Colección: Bombas de vacío
Bombas de Vacío para Laboratorio en Venta — Nuevas y Reacondicionadas | mLab Supply
Las bombas de vacío de laboratorio soportan una amplia gama de aplicaciones que incluyen filtración, desgasificación, evaporación rotatoria y aspiración. mLab Supply suministra bombas de vacío de diafragma, rotativas de paletas e híbridas adecuadas para el laboratorio general y el soporte de instrumentos analíticos.
Casos de Uso Comunes
- Filtración al vacío y montajes de embudos Buchner
- Soporte para evaporadores rotatorios y concentradores
- Desgasificación de disolventes y tampones para HPLC
- Aplicaciones de secado en gel y colectores de vacío
Qué Buscar
- Tipo de bomba: Las bombas de diafragma son libres de aceite y de bajo mantenimiento; las bombas rotativas de paletas logran un vacío más profundo para aplicaciones exigentes
- Vacío final: El trabajo de laboratorio general requiere 10–100 mbar; las aplicaciones analíticas pueden necesitar <1 mbar
- Caudal: Adapte a su aplicación — la filtración necesita un caudal mayor que la desgasificación
- Resistencia química: Las bombas de diafragma recubiertas de PTFE manejan disolventes agresivos mejor que los modelos estándar
Marcas que Suministramos
Welch (CRVpro, DryFast) | Vacuubrand (MZ 2C, PC 3001) | Edwards (RV8, nXDS) | Thermo Fisher | Gast
Opciones de Condición
- ✅ Nuevas (modelos seleccionados disponibles para suministro)
- ✅ Reacondicionadas / Usadas — revisadas y probadas
- ✅ Excedentes / Tal cual — precio acorde
La disponibilidad y los precios están sujetos a cambios. Envíe una solicitud de presupuesto y le confirmaremos el stock actual, el tiempo de entrega y las opciones de configuración en 1-2 días hábiles.
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Pfeiffer Duo 2.5 Rotary Vane Vacuum Pump — Request a Quote
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Agilent IDP-3 Dry Scroll Vacuum Pump — Request a Quote
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Edwards RV8 Rotary Vane Vacuum Pump — Request a Quote
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KNF N 816 Laboratory Vacuum Pump — Request a Quote
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Vacuubrand MD 4C NT Chemistry Diaphragm Pump — Request a Quote
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Welch 2522 Dry Vacuum Pump — Request a Quote
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Agotado
<h2>How to Choose a Laboratory Vacuum Pump</h2>
<p>Selecting the right vacuum pump depends on your required vacuum level, application, and operating environment. Key considerations include:</p>
<ul>
<li><strong>Required vacuum level:</strong> Different applications require different ultimate vacuum levels. Confirm the vacuum level required for your workflow before selecting a pump type.</li>
<li><strong>Pumping speed:</strong> Pumping speed (flow rate) determines how quickly the pump can evacuate a system. Match pumping speed to your system volume and required evacuation time.</li>
<li><strong>Gas compatibility:</strong> Confirm that the pump materials are compatible with the gases you will be pumping. Corrosive or reactive gases require pumps with appropriate chemical resistance.</li>
<li><strong>Solvent and chemical exposure:</strong> Solvent vapors can damage oil-sealed pumps or contaminate pump oil. Diaphragm and dry scroll pumps are often preferred for solvent-heavy workflows.</li>
<li><strong>Oil-free vs. oil-sealed operation:</strong> Oil-free pumps (diaphragm, dry scroll) require less maintenance around oil changes and are preferred for clean vacuum applications. Oil-sealed rotary vane pumps can achieve deeper vacuum but require oil management.</li>
<li><strong>Noise:</strong> Vacuum pump noise levels vary by type and model. Confirm noise levels for your laboratory environment.</li>
<li><strong>Maintenance requirements:</strong> Oil-sealed pumps require periodic oil changes and maintenance. Oil-free pumps have different service profiles. Confirm maintenance requirements before purchase.</li>
<li><strong>Ultimate vacuum:</strong> Confirm the ultimate vacuum specification meets your application requirements. Rotary vane pumps typically achieve deeper ultimate vacuum than diaphragm pumps.</li>
<li><strong>Inlet and outlet connections:</strong> Confirm that inlet and outlet connection sizes and types are compatible with your system.</li>
<li><strong>Duty cycle:</strong> Confirm whether the pump is rated for continuous operation or intermittent use, depending on your workflow.</li>
<li><strong>Footprint:</strong> Confirm that the pump dimensions are compatible with your available bench or cabinet space.</li>
<li><strong>Electrical requirements:</strong> Confirm voltage, frequency, and amperage requirements match your facility before purchase.</li>
<li><strong>Intended application:</strong> Vacuum filtration, rotary evaporation, vacuum ovens, aspiration, degassing, and analytical instrument support each have different pump requirements. Match the pump to your primary application.</li>
</ul>
<h2>Laboratory Vacuum Pump Types</h2>
<h3>Rotary Vane Vacuum Pumps</h3>
<p>Rotary vane vacuum pumps use rotating vanes within an oil-sealed chamber to generate vacuum. They are capable of achieving deep ultimate vacuum levels and are widely used in analytical instrument support, vacuum ovens, and applications requiring high vacuum performance. Oil-sealed operation requires periodic oil changes and maintenance. Solvent vapors can contaminate pump oil, so cold traps or exhaust management may be required in solvent-heavy workflows. The Edwards RV8 and Pfeiffer Duo 2.5 are examples of rotary vane vacuum pumps in this collection.</p>
<h3>Diaphragm Vacuum Pumps</h3>
<p>Diaphragm vacuum pumps use a reciprocating diaphragm to generate vacuum without pump oil, making them oil-free and well-suited for solvent filtration, aspiration, and general laboratory workflows where clean vacuum is required. Chemical resistance depends on the pump head and diaphragm materials — confirm compatibility with your specific chemicals before purchase. Diaphragm pumps typically achieve moderate ultimate vacuum levels suitable for most general laboratory applications. The Vacuubrand MD 4C NT Chemistry Diaphragm Pump and KNF N 816 Laboratory Vacuum Pump are examples of diaphragm vacuum pumps in this collection.</p>
<h3>Dry Scroll Vacuum Pumps</h3>
<p>Dry scroll vacuum pumps use intermeshing spiral scrolls to compress and move gas without pump oil, providing clean, oil-free vacuum. They are well-suited for applications where oil contamination is not acceptable and where a cleaner vacuum environment is required. Dry scroll pumps have a different service and maintenance profile compared to oil-sealed pumps — service intervals and component replacement requirements vary by model. The Welch 2522 Dry Vacuum Pump and Agilent IDP-3 Dry Scroll Vacuum Pump are examples of dry scroll vacuum pumps in this collection.</p>
<h2>Popular Vacuum Pump Manufacturers and Models</h2>
<p>mLab Supply sources laboratory vacuum pumps from leading manufacturers including Welch, Vacuubrand, KNF, Edwards, Agilent, and Pfeiffer. Common models available through our sourcing program include:</p>
<div class="mlab-collection-model-grid">
<h3>Welch</h3>
<ul>
<li>Welch 2522 Dry Vacuum Pump</li>
</ul>
<h3>Vacuubrand</h3>
<ul>
<li>Vacuubrand MD 4C NT Chemistry Diaphragm Pump</li>
</ul>
<h3>KNF</h3>
<ul>
<li>KNF N 816 Laboratory Vacuum Pump</li>
</ul>
<h3>Edwards</h3>
<ul>
<li>Edwards RV8 Rotary Vane Vacuum Pump</li>
</ul>
<h3>Agilent</h3>
<ul>
<li>Agilent IDP-3 Dry Scroll Vacuum Pump</li>
</ul>
<h3>Pfeiffer</h3>
<ul>
<li>Pfeiffer Duo 2.5 Rotary Vane Vacuum Pump</li>
</ul>
</div>
<p>Model availability varies. <a href="/pages/request-a-quote">Request a quote</a> for current availability or to source a specific model not listed.</p>
<h2>Oil-Free vs. Oil-Sealed Vacuum Pumps</h2>
<p>The choice between oil-free and oil-sealed vacuum pumps depends on your application, required vacuum level, and maintenance preferences:</p>
<ul>
<li><strong>Oil-free pumps (diaphragm, dry scroll):</strong> Operate without pump oil, eliminating oil changes and reducing the risk of oil contamination in the vacuum system. Well-suited for solvent-heavy workflows, clean vacuum applications, and environments where oil mist exhaust is not acceptable. Ultimate vacuum levels are typically moderate compared to oil-sealed pumps.</li>
<li><strong>Oil-sealed pumps (rotary vane):</strong> Use pump oil to seal the vacuum chamber, enabling deeper ultimate vacuum levels. Often preferred for analytical instrument support, vacuum ovens, and applications requiring high vacuum performance. Require periodic oil changes, oil mist exhaust management, and may require cold traps when pumping solvent vapors to protect the oil.</li>
</ul>
<p>Neither type is universally superior. The best choice depends on your required vacuum level, chemical compatibility, maintenance tolerance, and application. <a href="/pages/request-a-quote">Contact us</a> to discuss which pump type is best suited for your workflow.</p>
<h2>Buying Used and Refurbished Vacuum Pumps</h2>
<p>Used and refurbished vacuum pumps can provide significant cost savings. When evaluating a used unit, consider:</p>
<ul>
<li><strong>Pump-down performance:</strong> Confirm the pump achieves adequate vacuum for your application. Where possible, request pump-down performance data.</li>
<li><strong>Noise and vibration:</strong> Unusual noise or vibration may indicate bearing wear, vane wear, or other mechanical issues.</li>
<li><strong>Oil condition (oil-sealed pumps):</strong> Inspect oil color and condition. Dark, contaminated, or emulsified oil may indicate solvent exposure or deferred maintenance.</li>
<li><strong>Seal condition:</strong> Worn or damaged seals can reduce vacuum performance. Ask about seal history and service records where available.</li>
<li><strong>Bearings:</strong> Bearing wear can cause noise, vibration, and reduced performance. Ask about bearing history where available.</li>
<li><strong>Inlet and outlet condition:</strong> Inspect inlet and outlet ports for damage, corrosion, or contamination.</li>
<li><strong>Motor condition:</strong> Confirm the motor powers on, runs smoothly, and does not exhibit unusual noise or overheating.</li>
<li><strong>Chemical contamination:</strong> Pumps previously used with corrosive or reactive chemicals may have internal damage not visible externally. Ask about prior use history where available.</li>
<li><strong>Service history:</strong> Where available, service records provide useful context on maintenance and repairs.</li>
<li><strong>Included fittings and accessories:</strong> Hoses, traps, fittings, gauges, and accessories vary by unit. Confirm what is included before purchase.</li>
<li><strong>Electrical requirements:</strong> Confirm voltage, frequency, and amperage requirements match your facility before purchase.</li>
</ul>
<p>mLab Supply sources used and refurbished vacuum pumps from research institutions, pharmaceutical companies, and surplus equipment programs. <a href="/pages/request-a-quote">Request a quote</a> for current availability.</p>
<h2>Vacuum Compatibility and Chemical Considerations</h2>
<p>Chemical compatibility is a critical consideration when selecting a laboratory vacuum pump. Key factors include:</p>
<ul>
<li><strong>Solvent vapors:</strong> Solvent vapors can damage oil-sealed pump oil and internal components. Oil-free pumps with chemically resistant materials are often preferred for solvent-heavy workflows.</li>
<li><strong>Corrosive gases:</strong> Corrosive gases require pumps with appropriate chemical resistance in pump heads, diaphragms, valves, and seals. Confirm material compatibility before purchase.</li>
<li><strong>Aqueous workflows:</strong> Water vapor can contaminate pump oil in oil-sealed pumps. Gas ballast valves can help manage water vapor in some rotary vane pumps.</li>
<li><strong>Pump material compatibility:</strong> Confirm that pump head materials, diaphragm materials, and seal materials are compatible with your specific chemicals and process gases.</li>
<li><strong>Cold traps:</strong> Cold traps placed between the vacuum system and the pump can condense solvent vapors before they reach the pump, protecting pump oil and internal components.</li>
<li><strong>Exhaust handling:</strong> Pump exhaust may contain solvent vapors, oil mist, or process gases. Confirm that exhaust handling meets your laboratory safety requirements.</li>
<li><strong>Contamination risk:</strong> Pumps previously used with incompatible chemicals may retain contamination. Confirm prior use history where possible.</li>
</ul>
<p>Buyers must verify chemical compatibility for their exact chemicals, process gases, and intended use. mLab Supply does not guarantee chemical compatibility for any specific application.</p>
<h2>Applications</h2>
<p>Laboratory vacuum pumps support a wide range of research and process workflows, including:</p>
<ul>
<li>Vacuum filtration for sample preparation and analytical workflows</li>
<li>Rotary evaporation for solvent removal and concentration</li>
<li>Vacuum ovens for drying, degassing, and curing applications</li>
<li>Aspiration for liquid removal in cell culture and laboratory workflows</li>
<li>Degassing of liquids and solutions</li>
<li>Solvent evaporation and concentration workflows</li>
<li>Lyophilizer backing pump support where appropriate for the system configuration</li>
<li>Analytical instrument support including mass spectrometry and other vacuum-dependent instruments</li>
<li>General laboratory vacuum supply for benchtop and manifold systems</li>
</ul>
<p>Not every pump in this collection is suitable for every application. Buyers are responsible for confirming that any pump meets their specific application, vacuum level, and chemical compatibility requirements.</p>
<h2>Vacuum Pump Accessories and System Components</h2>
<p>A complete vacuum system typically requires accessories and components beyond the pump itself. Key considerations:</p>
<ul>
<li><strong>Vacuum tubing:</strong> Confirm tubing material and diameter are compatible with your vacuum level and chemical environment.</li>
<li><strong>Fittings and connectors:</strong> Confirm fitting sizes and types match your pump inlet and system connections.</li>
<li><strong>Vacuum gauges:</strong> Gauges allow monitoring of system vacuum level. Confirm gauge range and connection compatibility.</li>
<li><strong>Vacuum regulators:</strong> Regulators allow control of vacuum level for sensitive applications.</li>
<li><strong>Cold traps:</strong> Cold traps protect the pump from solvent vapors and condensable gases. Confirm trap compatibility with your pump and application.</li>
<li><strong>Inlet filters:</strong> Inlet filters protect the pump from particulates. Confirm filter compatibility with your pump inlet.</li>
<li><strong>Exhaust accessories:</strong> Exhaust filters, mist eliminators, and exhaust lines manage pump exhaust in the laboratory environment.</li>
<li><strong>Oil mist filters (oil-sealed pumps):</strong> Oil mist filters reduce oil aerosol in pump exhaust. Confirm compatibility with your pump model.</li>
</ul>
<p>Exact included accessories must be confirmed before purchase. Hoses, traps, fittings, gauges, and accessories vary by unit. <a href="/pages/request-a-quote">Contact us</a> for details on a specific listing.</p>
<h2>Procurement Support</h2>
<p>mLab Supply supports institutional and commercial laboratory equipment procurement. Our team can assist with:</p>
<ul>
<li><strong>Formal quotations:</strong> Written quotes for institutional purchasing, vendor onboarding, and purchase order workflows.</li>
<li><strong>Sourcing specific models:</strong> If a specific vacuum pump model is not currently listed, contact us. We can often source it through our supplier network.</li>
<li><strong>Configuration checks:</strong> We can advise on pump type, connection compatibility, and accessory requirements for specific applications before purchase.</li>
<li><strong>Shipping coordination:</strong> We coordinate shipping logistics for qualified orders, including appropriate packaging for sensitive instruments.</li>
<li><strong>Availability requests:</strong> Contact us to request availability on specific models or configurations not currently listed.</li>
</ul>
<p><a href="/pages/request-a-quote">Request a quote</a> or contact us to discuss your procurement requirements.</p>
<h2>Related Laboratory Equipment</h2>
<p>Buyers sourcing vacuum pumps often also need complementary instruments. mLab Supply sources a broad range of laboratory instruments, including <a href="/collections/rotary-evaporators">Rotary Evaporators</a> that commonly require vacuum pump support. Browse our full <a href="/collections/labequipment">Lab Equipment</a> catalog, including <a href="/collections/agilent-technologies">Agilent Technologies Laboratory Equipment</a>. To <a href="/pages/sell-lab-equipment">sell surplus laboratory equipment</a>, we purchase used instruments from institutions and research facilities.</p>
<h2>Why Buy From mLab Supply?</h2>
<ul>
<li>New, refurbished, and surplus vacuum pumps sourced from research institutions and commercial facilities</li>
<li>Ability to source discontinued and hard-to-find models through our supplier network</li>
<li>Vendor and procurement support for institutional purchasing workflows</li>
<li>Net 30 available for qualified institutions</li>
<li>Nationwide shipping coordination</li>
<li>Equipment purchasing and trade-in programs for surplus vacuum pumps</li>
<li>Configuration and compatibility guidance on pump type, connections, and accessories</li>
</ul>
<div class="mlab-collection-faq">
<h2>Frequently Asked Questions</h2>
<details>
<summary>What type of vacuum pump do I need for a laboratory?</summary>
<p>The right vacuum pump depends on your application, required vacuum level, and chemical environment. Diaphragm pumps are well-suited for general laboratory workflows including filtration, aspiration, and solvent-compatible applications. Rotary vane pumps are preferred for deeper vacuum applications including analytical instrument support and vacuum ovens. Dry scroll pumps provide clean, oil-free vacuum for applications where oil contamination is not acceptable. <a href="/pages/request-a-quote">Contact us</a> to discuss your specific requirements.</p>
</details>
<details>
<summary>What is the difference between rotary vane, diaphragm, and dry scroll vacuum pumps?</summary>
<p>Rotary vane pumps use oil-sealed rotating vanes to generate deep vacuum — they require oil management and maintenance but achieve high vacuum performance. Diaphragm pumps use a reciprocating diaphragm without oil, providing clean vacuum suitable for general laboratory and solvent workflows at moderate vacuum levels. Dry scroll pumps use intermeshing scrolls without oil, providing clean vacuum at performance levels between diaphragm and rotary vane pumps, with a different service profile.</p>
</details>
<details>
<summary>What vacuum level do I need for my application?</summary>
<p>Required vacuum level varies by application. Vacuum filtration and aspiration typically require moderate vacuum. Rotary evaporation requires deeper vacuum depending on the solvent. Vacuum ovens and analytical instruments may require high vacuum. Confirm the vacuum level specification required for your specific application before selecting a pump. <a href="/pages/request-a-quote">Contact us</a> to discuss your requirements.</p>
</details>
<details>
<summary>Should I choose an oil-free or oil-sealed vacuum pump?</summary>
<p>Oil-free pumps (diaphragm, dry scroll) are preferred for solvent-heavy workflows, clean vacuum applications, and environments where oil mist exhaust is not acceptable. Oil-sealed rotary vane pumps are preferred for applications requiring deeper ultimate vacuum, such as analytical instrument support and vacuum ovens. The best choice depends on your required vacuum level, chemical compatibility, and maintenance tolerance.</p>
</details>
<details>
<summary>Can laboratory vacuum pumps handle solvents?</summary>
<p>Chemical compatibility depends on the pump type and materials. Diaphragm pumps with chemically resistant materials are commonly used in solvent workflows. Oil-sealed rotary vane pumps can be damaged by solvent vapors — cold traps are often used to protect the pump oil. Dry scroll pumps may also be used in solvent applications depending on materials and configuration. Buyers must verify compatibility for their specific solvents and process conditions. mLab Supply does not guarantee chemical compatibility for any specific application.</p>
</details>
<details>
<summary>What should I inspect before buying a used vacuum pump?</summary>
<p>Key inspection points include pump-down performance, noise and vibration, oil condition (for oil-sealed pumps), seal condition, bearing condition, inlet and outlet port condition, motor condition, and prior chemical exposure history. Service history where available provides additional context. Confirm included accessories before purchase.</p>
</details>
<details>
<summary>Are hoses, fittings, gauges, or traps included with used vacuum pumps?</summary>
<p>Included accessories vary by unit. Some used pumps are sold with a complement of original accessories; others may have partial or no accessories. Confirm what is included with any specific unit before purchase. <a href="/pages/request-a-quote">Contact us</a> for details on a specific listing.</p>
</details>
<details>
<summary>Can mLab Supply source a specific Welch, Vacuubrand, KNF, Edwards, Agilent, or Pfeiffer vacuum pump?</summary>
<p>Yes. If a specific model is not currently listed, our sourcing team can often locate it through our supplier and institutional network. <a href="/pages/request-a-quote">Submit a quote request</a> with the model number and your requirements and we will follow up on availability.</p>
</details>
<details>
<summary>Are refurbished vacuum pumps suitable for regulated laboratory applications?</summary>
<p>Suitability for regulated applications including GMP manufacturing, clinical diagnostics, or pharmaceutical processing depends on buyer qualification, validation, SOPs, documentation, quality-system requirements, chemical compatibility, and intended use. mLab Supply does not guarantee that any unit meets specific regulatory requirements. Buyers are responsible for confirming suitability for their application.</p>
</details>
<details>
<summary>Does mLab Supply purchase surplus vacuum pumps?</summary>
<p>Yes. We purchase used and surplus vacuum pumps from research institutions, pharmaceutical companies, and commercial facilities. Visit our <a href="/pages/sell-lab-equipment">Sell Lab Equipment</a> page to submit details about your surplus equipment.</p>
</details>
<details>
<summary>Does mLab Supply offer Net 30 terms?</summary>
<p>Net 30 payment terms are available for qualified institutions. <a href="/pages/request-a-quote">Contact us</a> to discuss payment terms for your organization.</p>
</details>
</div>
<p>Selecting the right vacuum pump depends on your required vacuum level, application, and operating environment. Key considerations include:</p>
<ul>
<li><strong>Required vacuum level:</strong> Different applications require different ultimate vacuum levels. Confirm the vacuum level required for your workflow before selecting a pump type.</li>
<li><strong>Pumping speed:</strong> Pumping speed (flow rate) determines how quickly the pump can evacuate a system. Match pumping speed to your system volume and required evacuation time.</li>
<li><strong>Gas compatibility:</strong> Confirm that the pump materials are compatible with the gases you will be pumping. Corrosive or reactive gases require pumps with appropriate chemical resistance.</li>
<li><strong>Solvent and chemical exposure:</strong> Solvent vapors can damage oil-sealed pumps or contaminate pump oil. Diaphragm and dry scroll pumps are often preferred for solvent-heavy workflows.</li>
<li><strong>Oil-free vs. oil-sealed operation:</strong> Oil-free pumps (diaphragm, dry scroll) require less maintenance around oil changes and are preferred for clean vacuum applications. Oil-sealed rotary vane pumps can achieve deeper vacuum but require oil management.</li>
<li><strong>Noise:</strong> Vacuum pump noise levels vary by type and model. Confirm noise levels for your laboratory environment.</li>
<li><strong>Maintenance requirements:</strong> Oil-sealed pumps require periodic oil changes and maintenance. Oil-free pumps have different service profiles. Confirm maintenance requirements before purchase.</li>
<li><strong>Ultimate vacuum:</strong> Confirm the ultimate vacuum specification meets your application requirements. Rotary vane pumps typically achieve deeper ultimate vacuum than diaphragm pumps.</li>
<li><strong>Inlet and outlet connections:</strong> Confirm that inlet and outlet connection sizes and types are compatible with your system.</li>
<li><strong>Duty cycle:</strong> Confirm whether the pump is rated for continuous operation or intermittent use, depending on your workflow.</li>
<li><strong>Footprint:</strong> Confirm that the pump dimensions are compatible with your available bench or cabinet space.</li>
<li><strong>Electrical requirements:</strong> Confirm voltage, frequency, and amperage requirements match your facility before purchase.</li>
<li><strong>Intended application:</strong> Vacuum filtration, rotary evaporation, vacuum ovens, aspiration, degassing, and analytical instrument support each have different pump requirements. Match the pump to your primary application.</li>
</ul>
<h2>Laboratory Vacuum Pump Types</h2>
<h3>Rotary Vane Vacuum Pumps</h3>
<p>Rotary vane vacuum pumps use rotating vanes within an oil-sealed chamber to generate vacuum. They are capable of achieving deep ultimate vacuum levels and are widely used in analytical instrument support, vacuum ovens, and applications requiring high vacuum performance. Oil-sealed operation requires periodic oil changes and maintenance. Solvent vapors can contaminate pump oil, so cold traps or exhaust management may be required in solvent-heavy workflows. The Edwards RV8 and Pfeiffer Duo 2.5 are examples of rotary vane vacuum pumps in this collection.</p>
<h3>Diaphragm Vacuum Pumps</h3>
<p>Diaphragm vacuum pumps use a reciprocating diaphragm to generate vacuum without pump oil, making them oil-free and well-suited for solvent filtration, aspiration, and general laboratory workflows where clean vacuum is required. Chemical resistance depends on the pump head and diaphragm materials — confirm compatibility with your specific chemicals before purchase. Diaphragm pumps typically achieve moderate ultimate vacuum levels suitable for most general laboratory applications. The Vacuubrand MD 4C NT Chemistry Diaphragm Pump and KNF N 816 Laboratory Vacuum Pump are examples of diaphragm vacuum pumps in this collection.</p>
<h3>Dry Scroll Vacuum Pumps</h3>
<p>Dry scroll vacuum pumps use intermeshing spiral scrolls to compress and move gas without pump oil, providing clean, oil-free vacuum. They are well-suited for applications where oil contamination is not acceptable and where a cleaner vacuum environment is required. Dry scroll pumps have a different service and maintenance profile compared to oil-sealed pumps — service intervals and component replacement requirements vary by model. The Welch 2522 Dry Vacuum Pump and Agilent IDP-3 Dry Scroll Vacuum Pump are examples of dry scroll vacuum pumps in this collection.</p>
<h2>Popular Vacuum Pump Manufacturers and Models</h2>
<p>mLab Supply sources laboratory vacuum pumps from leading manufacturers including Welch, Vacuubrand, KNF, Edwards, Agilent, and Pfeiffer. Common models available through our sourcing program include:</p>
<div class="mlab-collection-model-grid">
<h3>Welch</h3>
<ul>
<li>Welch 2522 Dry Vacuum Pump</li>
</ul>
<h3>Vacuubrand</h3>
<ul>
<li>Vacuubrand MD 4C NT Chemistry Diaphragm Pump</li>
</ul>
<h3>KNF</h3>
<ul>
<li>KNF N 816 Laboratory Vacuum Pump</li>
</ul>
<h3>Edwards</h3>
<ul>
<li>Edwards RV8 Rotary Vane Vacuum Pump</li>
</ul>
<h3>Agilent</h3>
<ul>
<li>Agilent IDP-3 Dry Scroll Vacuum Pump</li>
</ul>
<h3>Pfeiffer</h3>
<ul>
<li>Pfeiffer Duo 2.5 Rotary Vane Vacuum Pump</li>
</ul>
</div>
<p>Model availability varies. <a href="/pages/request-a-quote">Request a quote</a> for current availability or to source a specific model not listed.</p>
<h2>Oil-Free vs. Oil-Sealed Vacuum Pumps</h2>
<p>The choice between oil-free and oil-sealed vacuum pumps depends on your application, required vacuum level, and maintenance preferences:</p>
<ul>
<li><strong>Oil-free pumps (diaphragm, dry scroll):</strong> Operate without pump oil, eliminating oil changes and reducing the risk of oil contamination in the vacuum system. Well-suited for solvent-heavy workflows, clean vacuum applications, and environments where oil mist exhaust is not acceptable. Ultimate vacuum levels are typically moderate compared to oil-sealed pumps.</li>
<li><strong>Oil-sealed pumps (rotary vane):</strong> Use pump oil to seal the vacuum chamber, enabling deeper ultimate vacuum levels. Often preferred for analytical instrument support, vacuum ovens, and applications requiring high vacuum performance. Require periodic oil changes, oil mist exhaust management, and may require cold traps when pumping solvent vapors to protect the oil.</li>
</ul>
<p>Neither type is universally superior. The best choice depends on your required vacuum level, chemical compatibility, maintenance tolerance, and application. <a href="/pages/request-a-quote">Contact us</a> to discuss which pump type is best suited for your workflow.</p>
<h2>Buying Used and Refurbished Vacuum Pumps</h2>
<p>Used and refurbished vacuum pumps can provide significant cost savings. When evaluating a used unit, consider:</p>
<ul>
<li><strong>Pump-down performance:</strong> Confirm the pump achieves adequate vacuum for your application. Where possible, request pump-down performance data.</li>
<li><strong>Noise and vibration:</strong> Unusual noise or vibration may indicate bearing wear, vane wear, or other mechanical issues.</li>
<li><strong>Oil condition (oil-sealed pumps):</strong> Inspect oil color and condition. Dark, contaminated, or emulsified oil may indicate solvent exposure or deferred maintenance.</li>
<li><strong>Seal condition:</strong> Worn or damaged seals can reduce vacuum performance. Ask about seal history and service records where available.</li>
<li><strong>Bearings:</strong> Bearing wear can cause noise, vibration, and reduced performance. Ask about bearing history where available.</li>
<li><strong>Inlet and outlet condition:</strong> Inspect inlet and outlet ports for damage, corrosion, or contamination.</li>
<li><strong>Motor condition:</strong> Confirm the motor powers on, runs smoothly, and does not exhibit unusual noise or overheating.</li>
<li><strong>Chemical contamination:</strong> Pumps previously used with corrosive or reactive chemicals may have internal damage not visible externally. Ask about prior use history where available.</li>
<li><strong>Service history:</strong> Where available, service records provide useful context on maintenance and repairs.</li>
<li><strong>Included fittings and accessories:</strong> Hoses, traps, fittings, gauges, and accessories vary by unit. Confirm what is included before purchase.</li>
<li><strong>Electrical requirements:</strong> Confirm voltage, frequency, and amperage requirements match your facility before purchase.</li>
</ul>
<p>mLab Supply sources used and refurbished vacuum pumps from research institutions, pharmaceutical companies, and surplus equipment programs. <a href="/pages/request-a-quote">Request a quote</a> for current availability.</p>
<h2>Vacuum Compatibility and Chemical Considerations</h2>
<p>Chemical compatibility is a critical consideration when selecting a laboratory vacuum pump. Key factors include:</p>
<ul>
<li><strong>Solvent vapors:</strong> Solvent vapors can damage oil-sealed pump oil and internal components. Oil-free pumps with chemically resistant materials are often preferred for solvent-heavy workflows.</li>
<li><strong>Corrosive gases:</strong> Corrosive gases require pumps with appropriate chemical resistance in pump heads, diaphragms, valves, and seals. Confirm material compatibility before purchase.</li>
<li><strong>Aqueous workflows:</strong> Water vapor can contaminate pump oil in oil-sealed pumps. Gas ballast valves can help manage water vapor in some rotary vane pumps.</li>
<li><strong>Pump material compatibility:</strong> Confirm that pump head materials, diaphragm materials, and seal materials are compatible with your specific chemicals and process gases.</li>
<li><strong>Cold traps:</strong> Cold traps placed between the vacuum system and the pump can condense solvent vapors before they reach the pump, protecting pump oil and internal components.</li>
<li><strong>Exhaust handling:</strong> Pump exhaust may contain solvent vapors, oil mist, or process gases. Confirm that exhaust handling meets your laboratory safety requirements.</li>
<li><strong>Contamination risk:</strong> Pumps previously used with incompatible chemicals may retain contamination. Confirm prior use history where possible.</li>
</ul>
<p>Buyers must verify chemical compatibility for their exact chemicals, process gases, and intended use. mLab Supply does not guarantee chemical compatibility for any specific application.</p>
<h2>Applications</h2>
<p>Laboratory vacuum pumps support a wide range of research and process workflows, including:</p>
<ul>
<li>Vacuum filtration for sample preparation and analytical workflows</li>
<li>Rotary evaporation for solvent removal and concentration</li>
<li>Vacuum ovens for drying, degassing, and curing applications</li>
<li>Aspiration for liquid removal in cell culture and laboratory workflows</li>
<li>Degassing of liquids and solutions</li>
<li>Solvent evaporation and concentration workflows</li>
<li>Lyophilizer backing pump support where appropriate for the system configuration</li>
<li>Analytical instrument support including mass spectrometry and other vacuum-dependent instruments</li>
<li>General laboratory vacuum supply for benchtop and manifold systems</li>
</ul>
<p>Not every pump in this collection is suitable for every application. Buyers are responsible for confirming that any pump meets their specific application, vacuum level, and chemical compatibility requirements.</p>
<h2>Vacuum Pump Accessories and System Components</h2>
<p>A complete vacuum system typically requires accessories and components beyond the pump itself. Key considerations:</p>
<ul>
<li><strong>Vacuum tubing:</strong> Confirm tubing material and diameter are compatible with your vacuum level and chemical environment.</li>
<li><strong>Fittings and connectors:</strong> Confirm fitting sizes and types match your pump inlet and system connections.</li>
<li><strong>Vacuum gauges:</strong> Gauges allow monitoring of system vacuum level. Confirm gauge range and connection compatibility.</li>
<li><strong>Vacuum regulators:</strong> Regulators allow control of vacuum level for sensitive applications.</li>
<li><strong>Cold traps:</strong> Cold traps protect the pump from solvent vapors and condensable gases. Confirm trap compatibility with your pump and application.</li>
<li><strong>Inlet filters:</strong> Inlet filters protect the pump from particulates. Confirm filter compatibility with your pump inlet.</li>
<li><strong>Exhaust accessories:</strong> Exhaust filters, mist eliminators, and exhaust lines manage pump exhaust in the laboratory environment.</li>
<li><strong>Oil mist filters (oil-sealed pumps):</strong> Oil mist filters reduce oil aerosol in pump exhaust. Confirm compatibility with your pump model.</li>
</ul>
<p>Exact included accessories must be confirmed before purchase. Hoses, traps, fittings, gauges, and accessories vary by unit. <a href="/pages/request-a-quote">Contact us</a> for details on a specific listing.</p>
<h2>Procurement Support</h2>
<p>mLab Supply supports institutional and commercial laboratory equipment procurement. Our team can assist with:</p>
<ul>
<li><strong>Formal quotations:</strong> Written quotes for institutional purchasing, vendor onboarding, and purchase order workflows.</li>
<li><strong>Sourcing specific models:</strong> If a specific vacuum pump model is not currently listed, contact us. We can often source it through our supplier network.</li>
<li><strong>Configuration checks:</strong> We can advise on pump type, connection compatibility, and accessory requirements for specific applications before purchase.</li>
<li><strong>Shipping coordination:</strong> We coordinate shipping logistics for qualified orders, including appropriate packaging for sensitive instruments.</li>
<li><strong>Availability requests:</strong> Contact us to request availability on specific models or configurations not currently listed.</li>
</ul>
<p><a href="/pages/request-a-quote">Request a quote</a> or contact us to discuss your procurement requirements.</p>
<h2>Related Laboratory Equipment</h2>
<p>Buyers sourcing vacuum pumps often also need complementary instruments. mLab Supply sources a broad range of laboratory instruments, including <a href="/collections/rotary-evaporators">Rotary Evaporators</a> that commonly require vacuum pump support. Browse our full <a href="/collections/labequipment">Lab Equipment</a> catalog, including <a href="/collections/agilent-technologies">Agilent Technologies Laboratory Equipment</a>. To <a href="/pages/sell-lab-equipment">sell surplus laboratory equipment</a>, we purchase used instruments from institutions and research facilities.</p>
<h2>Why Buy From mLab Supply?</h2>
<ul>
<li>New, refurbished, and surplus vacuum pumps sourced from research institutions and commercial facilities</li>
<li>Ability to source discontinued and hard-to-find models through our supplier network</li>
<li>Vendor and procurement support for institutional purchasing workflows</li>
<li>Net 30 available for qualified institutions</li>
<li>Nationwide shipping coordination</li>
<li>Equipment purchasing and trade-in programs for surplus vacuum pumps</li>
<li>Configuration and compatibility guidance on pump type, connections, and accessories</li>
</ul>
<div class="mlab-collection-faq">
<h2>Frequently Asked Questions</h2>
<details>
<summary>What type of vacuum pump do I need for a laboratory?</summary>
<p>The right vacuum pump depends on your application, required vacuum level, and chemical environment. Diaphragm pumps are well-suited for general laboratory workflows including filtration, aspiration, and solvent-compatible applications. Rotary vane pumps are preferred for deeper vacuum applications including analytical instrument support and vacuum ovens. Dry scroll pumps provide clean, oil-free vacuum for applications where oil contamination is not acceptable. <a href="/pages/request-a-quote">Contact us</a> to discuss your specific requirements.</p>
</details>
<details>
<summary>What is the difference between rotary vane, diaphragm, and dry scroll vacuum pumps?</summary>
<p>Rotary vane pumps use oil-sealed rotating vanes to generate deep vacuum — they require oil management and maintenance but achieve high vacuum performance. Diaphragm pumps use a reciprocating diaphragm without oil, providing clean vacuum suitable for general laboratory and solvent workflows at moderate vacuum levels. Dry scroll pumps use intermeshing scrolls without oil, providing clean vacuum at performance levels between diaphragm and rotary vane pumps, with a different service profile.</p>
</details>
<details>
<summary>What vacuum level do I need for my application?</summary>
<p>Required vacuum level varies by application. Vacuum filtration and aspiration typically require moderate vacuum. Rotary evaporation requires deeper vacuum depending on the solvent. Vacuum ovens and analytical instruments may require high vacuum. Confirm the vacuum level specification required for your specific application before selecting a pump. <a href="/pages/request-a-quote">Contact us</a> to discuss your requirements.</p>
</details>
<details>
<summary>Should I choose an oil-free or oil-sealed vacuum pump?</summary>
<p>Oil-free pumps (diaphragm, dry scroll) are preferred for solvent-heavy workflows, clean vacuum applications, and environments where oil mist exhaust is not acceptable. Oil-sealed rotary vane pumps are preferred for applications requiring deeper ultimate vacuum, such as analytical instrument support and vacuum ovens. The best choice depends on your required vacuum level, chemical compatibility, and maintenance tolerance.</p>
</details>
<details>
<summary>Can laboratory vacuum pumps handle solvents?</summary>
<p>Chemical compatibility depends on the pump type and materials. Diaphragm pumps with chemically resistant materials are commonly used in solvent workflows. Oil-sealed rotary vane pumps can be damaged by solvent vapors — cold traps are often used to protect the pump oil. Dry scroll pumps may also be used in solvent applications depending on materials and configuration. Buyers must verify compatibility for their specific solvents and process conditions. mLab Supply does not guarantee chemical compatibility for any specific application.</p>
</details>
<details>
<summary>What should I inspect before buying a used vacuum pump?</summary>
<p>Key inspection points include pump-down performance, noise and vibration, oil condition (for oil-sealed pumps), seal condition, bearing condition, inlet and outlet port condition, motor condition, and prior chemical exposure history. Service history where available provides additional context. Confirm included accessories before purchase.</p>
</details>
<details>
<summary>Are hoses, fittings, gauges, or traps included with used vacuum pumps?</summary>
<p>Included accessories vary by unit. Some used pumps are sold with a complement of original accessories; others may have partial or no accessories. Confirm what is included with any specific unit before purchase. <a href="/pages/request-a-quote">Contact us</a> for details on a specific listing.</p>
</details>
<details>
<summary>Can mLab Supply source a specific Welch, Vacuubrand, KNF, Edwards, Agilent, or Pfeiffer vacuum pump?</summary>
<p>Yes. If a specific model is not currently listed, our sourcing team can often locate it through our supplier and institutional network. <a href="/pages/request-a-quote">Submit a quote request</a> with the model number and your requirements and we will follow up on availability.</p>
</details>
<details>
<summary>Are refurbished vacuum pumps suitable for regulated laboratory applications?</summary>
<p>Suitability for regulated applications including GMP manufacturing, clinical diagnostics, or pharmaceutical processing depends on buyer qualification, validation, SOPs, documentation, quality-system requirements, chemical compatibility, and intended use. mLab Supply does not guarantee that any unit meets specific regulatory requirements. Buyers are responsible for confirming suitability for their application.</p>
</details>
<details>
<summary>Does mLab Supply purchase surplus vacuum pumps?</summary>
<p>Yes. We purchase used and surplus vacuum pumps from research institutions, pharmaceutical companies, and commercial facilities. Visit our <a href="/pages/sell-lab-equipment">Sell Lab Equipment</a> page to submit details about your surplus equipment.</p>
</details>
<details>
<summary>Does mLab Supply offer Net 30 terms?</summary>
<p>Net 30 payment terms are available for qualified institutions. <a href="/pages/request-a-quote">Contact us</a> to discuss payment terms for your organization.</p>
</details>
</div>