Across International

<h2>What are Vacuubrand vacuum pumps?</h2>
&nbsp;
Vacuubrand is a German manufacturer specializing in laboratory vacuum pumps and vacuum control systems. It is best known for PTFE-wetted diaphragm pumps, chemistry vacuum systems that combine pumps with electronic controllers, and VARIO speed-regulated technology that automatically adjusts vacuum conditions during solvent evaporation.
&nbsp;
<h2 data-path-to-node="0">What You Will Find:</h2>
&nbsp;
<ul data-path-to-node="1">
<li>
Self-adjusting vacuum systems featuring variable motor speeds that automatically adapt to vapor loads for highly efficient, optimization-free distillations.
</li>
<li>
Compact, oil-free chemistry diaphragm pumps delivering 0.9 CFM flow rates alongside exceptional chemical resistance for clean, low-maintenance laboratory vacuums.
</li>
<li>
High-capacity three-stage chemistry diaphragm pumps providing a robust 2.2 CFM flow rate and deep ultimate vacuum levels for demanding solvent evaporations.
</li>
</ul>
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<h2>How to choose a Vacuubrand vacuum pump</h2>
&nbsp;
Choose the ME series for a standalone PTFE diaphragm pump
The ME series includes single-stage (ME 1) and two-stage (ME 2) PTFE diaphragm pumps. ME 1 is suitable for filtration and basic concentration (~70&ndash;100 mbar), while ME 2 achieves deeper vacuum (~7 mbar) for rotary evaporation and SpeedVac applications.
Choose the PC series for an integrated pump and vacuum controller
The PC series combines a PTFE diaphragm pump with an electronic controller that regulates and displays vacuum levels. This allows precise set-point control for reproducible rotary evaporation without manual adjustment.
Choose VARIO technology for automatic evaporation optimization
VARIO technology automatically adjusts pump speed based on solvent evaporation behavior, optimizing evaporation rate while preventing bumping. It removes the need for manual vacuum control during operation.
Confirm chemical resistance for your application
Vacuubrand diaphragm pumps use PTFE-wetted components, providing broad resistance to organic solvents, acids, and corrosive vapors. Compatibility should still be checked against manufacturer chemical resistance data.
Consider a full chemistry vacuum system for rotary evaporation
Integrated systems (pump + controller + accessories) simplify setup and provide automated vacuum control, reducing the need for individual component selection and calibration.
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<h2>Specifications context</h2>
&nbsp;
Vacuubrand VARIO technology uses speed-controlled pumping to adjust vacuum dynamically during evaporation, tracking solvent boiling behavior as composition changes. This improves efficiency and reduces bumping in rotary evaporation workflows.
As of 2026, Vacuubrand CVC 3000 and VARIO systems remain widely used automated vacuum control solutions in synthetic chemistry and research laboratories.
<a href="https://mbpinc.net/contact-us">Conatct team at MBP</a> for a quick quote.

Vacuubrand Pumps

Vacuubrand VARIO PC 3001 SELECT 1.2 CFM Self-Adjust Pump 110V

The PC 3001 VARIO select pumping unit offers precise vacuum control for optimal process performance, ideal for high-boiling point solvents. It features an integrated VACUUSELECT controller with an intuitive interface, allowing manual, automated, or custom applications. With a self-adjusting system, this oil-free pump minimizes bumping and foaming, ensuring safety during solvent evaporation. It operates quietly, has a long service life, and includes a built-in solvent recovery system, eliminating the need for cold traps. The pump’s corrosion-resistant design and efficient vapor capture make it environmentally friendly and cost-effective.\n\n\n\n

Manufacturer

<h2>What are pressing dies?</h2>
&nbsp;
Pressing dies are the precision-machined tooling inserted into a laboratory press that define the size and shape of a pressed pellet or disc, typically consisting of a cylindrical barrel, a bottom punch or anvil, a top punch, and sometimes an evacuable port. The die determines the pellet diameter, the achievable pressure per unit area at a given press force, and the surface finish quality of the pressed pellet. Standard die sizes are 13 mm for FTIR KBr pellets and 25, 32, or 40 mm for XRF pressed powder pellets, with stainless steel for most applications and tungsten carbide for trace element work where steel contamination must be avoided.
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<h2>What you will find:</h2>
&nbsp;
<ul>
<li>Square Easy Retrieve Dry Pressing Die Set</li>
<li>Cylindrical Easy Retrieve Dry Pressing Die Set</li>
<li>Evacuable Pellet Die Set</li>
<li>Mini Pellet Press Die Set</li>
<li>Hydraulic Press Die Accessories</li>
<li>Pellet Pressing Die Components</li>
</ul>
&nbsp;
<h2>How to choose pressing dies</h2>
&nbsp;
Match die diameter to your analytical instrument's sample holder
The 13 mm die is standard for FTIR spectrometers where the 13 mm pellet fills the aperture of the sample holder, while XRF instruments use 25, 32, or 40 mm diameter cups depending on the specific spectrometer model and cup type. Confirming the required pellet diameter from your instrument's user manual or sample cup dimensions prevents ordering the wrong die size.
Choose evacuable dies for cleaner FTIR pellets in humid environments
An evacuable die includes a vacuum port and o-ring sealed barrel that allows the die contents to be evacuated with a vacuum pump before and during pressing, removing air and moisture from the KBr-sample mixture. This produces pellets with reduced water absorption backgrounds in the FTIR spectrum, important for trace amount analysis where water vapor bands could obscure analyte peaks.
Choose tungsten carbide (WC) dies for trace element XRF analysis
Stainless steel dies contain iron, chromium, and nickel that can contaminate pressed pellets at trace levels detectable by XRF, while tungsten carbide dies introduce only tungsten and carbon, which are not typically analytes in environmental or geological XRF work. For trace element XRF analysis, WC dies are required to avoid systematic contamination of pressed pellet surfaces from the die.
Confirm die compatibility with your press model
Die sets must be compatible with the bore dimensions and plate geometry of the specific press. Confirm that the die outer diameter matches the press die seat before purchase, since dies and presses from different manufacturers may not be interchangeable.
Maintain dies correctly to preserve pellet surface quality
Scratches or pitting on die surfaces transfer defects to pressed pellets, reducing optical quality for FTIR or surface flatness for XRF. Regular gentle cleaning and periodic polishing with fine alumina paste on punch faces maintains die surface quality.
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<h2>Specifications context</h2>
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The pressure applied to the sample equals press force divided by die area: a 10-ton press through a 13 mm die produces approximately 700 MPa, while the same force through a 40 mm die produces approximately 75 MPa. Producing the same pellet density in a larger die therefore requires proportionally more force, and a press adequate for 13 mm FTIR pellets may not deliver sufficient compaction for 40 mm XRF dies.
<a href="https://mbpinc.net/contact-us">Request a quote today from the expert team at Molecular Biology Products Inc. (MBP)</a> to find the right pressing dies for your lab.

Pressing Dies

Vacuum Dry Pressing Die Set Specifications

Vacuum Dry Pressing Die Set

A set of hardened steel Vacuum dry pressing die set for pellet presses, are ready for you to make cylinder-shape pellets in a vacuum condition. These pressing die sets are available in different sizes ranging from 6mm to 50mm diameter.\r\n\r\n

6mm Diameter ID Vacuum Dry Pressing Die Set

13mm Diameter ID Vacuum Dry Pressing Die Set

25mm Diameter ID Vacuum Dry Pressing Die Set

50mm Diameter ID Vacuum Dry Pressing Die Set

<h2>What are Welch vacuum pumps?</h2>
&nbsp;
Across International is an American laboratory vacuum pump brand offering oil-free diaphragm and corrosion-resistant pumps for routine laboratory vacuum applications. Its specialized series is the flagship line, designed for chemical resistance and reliable performance in standard lab workflows.
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<h2>What you will find: </h2>
&nbsp;
<ul>
<li data-path-to-node="1,0,0">Corrosion-resistant, two-stage belt-driven systems specifically engineered to handle aggressive chemical vapors and highly corrosive gases.</li>
<li data-path-to-node="1,1,0">Heavy-duty vacuum systems equipped with explosion-proof motors to ensure safe operation in hazardous environments containing flammable vapors.</li>
<li data-path-to-node="1,2,0">Fully chemical-resistant, four-head diaphragm configurations designed to provide high-flow, oil-free vacuum performance for harsh solvent evaporations.</li>
<li data-path-to-node="1,3,0">Rugged, dual-stage oil-sealed pumps utilizing a reliable belt-drive mechanism to deliver deep, stable high-vacuum levels.</li>
<li data-path-to-node="1,4,0">Original equipment service kits packed with essential replacement parts to maintain optimum sealing and extend diaphragm operational life.</li>
<li data-path-to-node="1,5,0">Air-cooled diffusion systems engineered to boost vacuum throughput and achieve ultra-high vacuum ranges for specialized industrial or physics applications.</li>
<li data-path-to-node="1,6,0">Two-head, oil-free chemical duty pumps utilizing advanced dry technology to ensure clean, low-maintenance laboratory vacuums.</li>
</ul>
&nbsp;
<h2>How to choose a Welch vacuum pump</h2>
&nbsp;
Choose the Dryfast ULTRA series for oil-free chemical vacuum
The Dryfast ULTRA series provides PTFE-wetted, oil-free vacuum pumps suitable for routine chemistry and biology applications. Single-stage models are used for filtration, while two-stage models support deeper vacuum for rotary evaporation and concentration.
Choose the CRV Pro series for aggressive chemical resistance
The CRV Pro series is designed for highly corrosive environments, including strong acids and halogenated solvents, offering enhanced material resistance compared with standard diaphragm pump construction.
Confirm ultimate vacuum requirements
Single-stage Welch pumps typically reach ~50&ndash;100 mbar for filtration, while two-stage models achieve ~3&ndash;7 mbar for rotary evaporation and SpeedVac applications. Model selection should match the required vacuum level.
Consider control requirements
Most Welch pumps are used as standalone systems, but they can also be paired with external vacuum controllers for set-point regulation when more precise control is required.
Check noise and installation requirements
Noise levels vary by model, so specifications should be reviewed for bench placement or enclosed operation. Exhaust routing and ventilation should also be considered during setup.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
Welch Dryfast pumps are designed for continuous operation with thermal protection that shuts down the motor under overheating conditions and restarts after cooling. They are widely used in North American laboratories due to their balance of cost, reliability, and chemical resistance.
As of 2026, Welch Dryfast ULTRA pumps remain a standard choice for oil-free diaphragm vacuum applications in research and analytical labs.
The MBP team is here to help&mdash;<a href="https://mbpinc.net/contact-us">reach out today for a personalized quote</a>.

Welch Pumps

Welch 1400 DuoSeal belt drive rotary vane dual stage pump

Welch 1400 DuoSeal Standard Package

Welch 1400 DuoSeal 0.9 cfm 0.1 Micron Belt Drive Dual-Stage Pump

The Welch 1400 DuoSeal belt drive rotary vane is a durable vacuum pump with a superior vapor handling capability. It offers an excellent ultimate pressure of 1x10-4 torr. These pumps are commonly used for vacuum furnace evacuation, backing turbomolecular pumps, backing diffusion pumps, rotary evaporation, refrigeration system evacuation, epoxy degassing, vacuum sterilization, backing mass spectrometers, freeze drying, vacuum centrifugal applications, vacuum distillation, space research, and other vacuum processes. These Welch 1400 DuoSeal Belt Drive Pumps have a pumping speed displacement of 0.9 CFM.\r\n\r\n

Model

Electrical requirements

 Type

Application

Pumping rate

Oil capacity

Ult. vacuum pressure

Motor speed

Intake ID (vacuum connection)

Intake/exhaust thread size

Adjustable vac./gas ballast

Pump weight

Compliance

Vacuum Pump

<h2>What are laboratory vacuum pumps?</h2>
&nbsp;
Laboratory vacuum pumps are instruments that remove gas from a connected vessel or system to create sub-atmospheric pressure for applications including rotary evaporation of solvents, vacuum filtration through B&uuml;chner funnels and membranes, SpeedVac centrifugal concentration, gel drying, lyophilization rough vacuum, and degassing of solvents and solutions. MBP carries vacuum pumps from Vacuubrand, Welch, and ULVAC, which together cover the full range of laboratory vacuum needs from moderate filtration vacuum to deep vacuum for turbomolecular backing, available in oil-free diaphragm and oil-sealed rotary vane configurations.
&nbsp;
<h2>What you will find:</h2>
&nbsp;
<ul style="list-style-type: disc;">
<li dir="ltr"><a href="https://mbpinc.net/equipments/sample-processing/pumps/vaccum-pumps/edwards-pumps" style="color: #236fa1;">Edwards Pumps: </a>Reliability at its best &ndash; with strong vacuum pumps that are made to work for high-performing industrial and research purposes.</li>
<li dir="ltr"><a href="https://mbpinc.net/equipments/sample-processing/pumps/vaccum-pumps/agilent-pumps" style="color: #236fa1;">Agilent Pumps: </a>Get the most out of high vacuum pumps engineered for mass spectrometry, leak testing, and other advanced lab methods.</li>
<li dir="ltr"><a href="https://mbpinc.net/equipments/sample-processing/pumps/vaccum-pumps/vacuubrand-pumps">Vacuubrand Pumps: </a>Take advantage of German-engineered diaphragm pumps and vacuum control devices that are resistant to chemical agents and easy to maintain.</li>
<li dir="ltr"><a href="https://mbpinc.net/equipments/sample-processing/pumps/vaccum-pumps/welch-pumps">Welch Pumps: </a>Perfect for all your routine lab procedures using vacuum pumps made with quality materials for durability and versatility.</li>
<li dir="ltr"><a href="https://mbpinc.net/equipments/sample-processing/pumps/vaccum-pumps/ulvac-pumps" style="color: #236fa1;">ULVAC Pumps:</a> Use proven Japanese vacuum technology renowned for reliable and effective operations in manufacturing and thin-film production.</li>
<li dir="ltr"><a href="https://mbpinc.net/equipments/sample-processing/pumps/vaccum-pumps/vaccum-pump-accessories" style="color: #236fa1;">Vacuum Pump Accessories:</a> Boost your system&rsquo;s capabilities with oil mist filters, traps, and other accessories to optimize pump performance.</li>
</ul>
&nbsp;
<h2>How to choose between vacuum pump brands and types</h2>
&nbsp;
Choose Vacuubrand for premium PTFE diaphragm and chemistry vacuum systems
Vacuubrand diaphragm pumps are known for their high-quality PTFE-wetted construction, precise chemistry vacuum control systems with automatic set-point regulation, and a broad range of configurations from single-stage to two-stage models, making them the preferred brand for demanding rotary evaporation and concentration applications where reproducible vacuum control is important.
Choose Welch for reliable, cost-effective diaphragm and corrosion-resistant vacuum
Welch (by Gardner Denver) diaphragm pumps offer solid performance for routine filtration and moderate vacuum applications at a competitive price point, with the Dryfast ULTRA series as their flagship oil-free, chemically resistant product line covering most common laboratory vacuum needs.
Choose ULVAC for applications requiring deeper vacuum
ULVAC rotary vane oil-sealed pumps achieve deeper ultimate vacuum levels than oil-free diaphragm pumps, making them appropriate for applications like thin-film deposition, high-vacuum instruments, manifold vacuum systems, or backing turbomolecular pumps, where vacuum levels below 1 mbar are required.
Check the accessories catalog for vacuum tubing, traps, and gauges
Accessories include cold traps and chemical traps to protect pumps from solvent and corrosive vapors, vacuum tubing (rubber, silicone, or PTFE), and vacuum gauges and controllers for monitoring and regulating applied vacuum.
Match ultimate vacuum and pumping speed to your application requirements
Ultimate vacuum determines the lowest pressure achievable, while pumping speed determines how quickly the system reaches and maintains that vacuum. Both must be matched to system volume and gas load from evaporation, filtration, or outgassing.
&nbsp;
<h2>Specifications context</h2>
&nbsp;
The choice between oil-free diaphragm and oil-sealed rotary vane pumps is primarily determined by required ultimate vacuum and chemical exposure. Diaphragm pumps provide oil-free, low-maintenance vacuum suitable for most chemistry and biology applications above ~1&ndash;5 mbar, while rotary vane pumps achieve deeper vacuum but require oil changes and carry contamination risk.
As of 2026, oil-free diaphragm pumps from Vacuubrand and Welch cover most standard molecular biology and chemistry vacuum applications, while ULVAC rotary vane and dry pumps serve specialized deep-vacuum requirements.
Do you need any assistance figuring out your displacement or pressure requirements? Our experts at MBP are here to help. <a href="https://mbpinc.net/contact-us">Contact us for a customized quote.</a>

Vaccum Pump

Welch 1417 Oil Mist Exhaust Filter for 1400 DuoSeal Vacuum Pumps

The 1417 by Welch is a 0.3-micron oil mist exhaust filter for the Welch 1400 DuoSeal belt-driven rotary vane vacuum pump series. It installs with a screw-in design and sealing gasket, captures oil aerosol from the pump exhaust, and reduces pump noise. Replacement elements (1417G/1417L) are available separately. Supplied by MBP Inc. to research and industrial accounts across the USA and Canada.

Manufacture

Welch 1417F KF25 Exhaust Oil Mist Filter with Drainback Feature

1417F by Welch Vacuum is a KF25 (NW25) exhaust oil mist filter with a 0.3 micron filtration rating and integrated drainback feature that returns coalesced pump oil to the reservoir, reducing oil consumption. Compatible with Welch CRVpro 16/24/30, 1402N, and 1376N rotary vane pumps; replacement element is Welch 1417H-01.

Welch 2052 Diaphragm Vacuum Pump Service Kit Standard Package

Welch 2052 Diaphragm Vacuum Pump Service Kit

This service kit will keep your Welch 2052 diaphragm pumps run at top performance.\r\n\r

Product Literature

Welch CRVPro Direct Drive Rotary Vane Vacuum Pump

Welch CRVPro Direct Drive Rotary Vane Vacuum Pump Series

The CRVpro series by Welch Vacuum is a seven-model line of direct-drive two-stage rotary vane pumps (CRVpro 2 through 30) covering 1.8–21 CFM at a 2×10⁻³ mbar ultimate pressure. Direct-drive construction eliminates belt maintenance; the enlarged oil reservoir (40% larger than comparable pumps) extends oil life by diluting contaminants. Each pump ships with 1L of Welch premium oil, a KF16 adapter, and a manual. Contact MBP to specify the model CFM rating you need and request institutional pricing.

Welch 5.6 CFM CRVPro 8 Direct Drive Rotary Vane Vacuum Pump

Welch 12.8 CFM CRVPro 16 Direct Drive Rotary Vane Vacuum Pump

Welch 22 CFM CRVPro 30 Direct Drive Rotary Vane Vacuum Pump

Welch 39 CFM CRVPro 48 Direct Drive Rotary Vane Vacuum Pump

Welch 53 CFM CRVPro 65 Direct Drive Rotary Vane Vacuum Pump

Welch CRVpro Series Rotary Vane Vacuum Pumps

Welch CRVPro Series Explosion Proof Rotary Vane Vacuum Pump

Motor Wiring Diagram (should be on motor)

Fastening Kit (4x Fastening Screws, 1x Ground Screw, 4x Lock Washers) | Located inside Junction Box

Welch CRVpro Explosion Proof Rotary Vane Vacuum Pumps

The CRVpro-EX series by Welch are explosion-proof two-stage rotary vane vacuum pumps (2.8–12.8 CFM) with an ultimate vacuum of 1.5 × 10⁻³ Torr, cUL listed (E485334). Designed for hazardous locations where flammable vapors are present, these units require professional conduit wiring and ship without cord or plug. Available through MBP Inc. for research and industrial procurement across the USA and Canada.

Welch 5.6 CFM CRVpro8 Explosion Proof Rotary Vane Vacuum Pump

Welch 12.8 CFM CRVpro16 Explosion Proof Rotary Vane Vacuum Pump

Welch ChemStar 1400N DuoSeal belt drive rotary vane dual-stage pump

Power Cord with plug (may be hardwired to the unit)

Welch ChemStar 1400N DuoSeal Standard Package

Welch ChemStar 1400N 0.9 cfm 0.1 Micron Belt Drive 2-Stage Pump

The Welch 1400N ChemStar belt drive rotary vane is a durable vacuum pump with a superior vapor handling capability. It offers an excellent ultimate pressure of 1x10-4 torr. These pumps are commonly used for vacuum furnace evacuation, backing turbomolecular pumps, backing diffusion pumps, rotary evaporation, refrigeration system evacuation, epoxy degassing, vacuum sterilization, backing mass spectrometers, freeze drying, vacuum centrifugal applications, vacuum distillation, space research, and other vacuum processes. These Welch 1400N ChemStar Belt Drive Pumps have a pumping speed displacement of 0.9 CFM.\r\n\r\n

Type

 Intake/exhaust thread size

Shipping dimensions (LxWxH)

Welch 2085 6.9 CFM Diaphragm Pump with Explosion Proof Motor

Fastening Kit (4x Fastening Screws, 1x Ground Screws, 4x Lock Washers) | Located inside Junction Box

Welch 2085 6.9 CFM Diaphragm Pump with Explosion Proof Motor Standard Package

Welch 2090 4.5 CFM Diaphragm Pump with Explosion Proof Motor

Welch 2090 4.5 CFM Diaphragm Pump with Explosion Proof Motor Standard Package

Welch Diaphragm Pump with Explosion Proof Motor

Welch DryFast 2-Head Diaphragm Chemical Duty Pump

Vacuum Filtration

Welch 2034 chemical-resistant oil-free diaphragm pump

White premium food-grade silicone vacuum hose

Welch 2034 Chemical-Resistant Oil-Free Diaphragm Pump Standard Package

Welch 2047 chemical-resistant oil-free diaphragm pump

White premium food grade silicone vacuum hose

Welch 2047 Chemical-Resistant Oil-Free Diaphragm Pump Standard Package

Welch DryFast PTFE Diaphragm Vacuum Pumps enable precise vacuum control for organic evaporations with exclusive Advanced Vapor Management (AVM). Oil-Free, portable, chemical resistant, 2 head diaphragm design simplifies maintenance. Economical DryFast vacuum pumps are perfect for tough lab applications.

Welch 2034 0.9 cfm DryFast 2-Head Diaphragm Chemical Duty Pump

Welch 2047 2.5 cfm DryFast 2-Head Diaphragm Chemical Duty Pump

Vacuum Pump 1

Vacuum Pump 2

Welch 2052 2.3 cfm full chemical-resistant oil-free diaphragm pump

White premium food grade silicone vacuum hose (3 ft)

Welch 2052 Chemical-Resistant Oil-Free Diaphragm Pump Standard Package

12 mm diameter EDPM O-ring (Welch PN 829217-3)

Welch 2163 8-Head Diaphragm Pump Standard Package

Welch Full Chemical-Resistant 4-Head Diaphragm Pump

The Welch 2052 and Welch 2163 are high-performance, full chemical-resistant, oil-free dry diaphragm vacuum pumps, designed for demanding laboratory applications. Both models feature all-PTFE contact surfaces (Welch 2052) and all-aluminum contact surfaces (Welch 2163), ensuring excellent chemical resistance and deep vacuum capability. These pumps are portable, require less maintenance, and eliminate the need for frequent and costly oil changes, preventing cross-contamination.