The Welch vacuum pump product line can meet the needs of many. Their product line includes oil lubricated rotary vane vacuum pumps, dry piston and diaphragm vacuum pumps. With these specialized pumps they can provide pump products for chemical and biological laboratories, high vacuum manufacturing and air conditioning / refrigeration companies.

Welch has a vacuum pump product line that can meet the needs of many. Their product line includes oil lubricated rotary vane vacuum pumps, dry piston and diaphragm vacuum pumps. With these specialized pumps they can provide pump products for chemical and biological laboratories, high vacuum manufacturing and air conditioning / refrigeration companies. There are many different ones to choose from.

Let’s take a look at some of the Chemical pumps that are offered:

PTFE Dry Pumps: This is a rotary evaporation / distillation system. Offers filtration and is used for pumping harsh vapors and gases.

Dry Fast Collegiate, Dryfast and Dryfast Ultra: This is small, lightweight, oil free and has low maintenance. It has a precision vacuum adjustment feature. It enables fume discharge to your hood.

Self-Cleaning Dry Vacuum System: It has rotary evaporators and vacuum concentrators. It has a gel dryer system and a drying apparatus. The PTFE is corrosion resistant. It is self-cleaning for a longer head life. It has a gas ballast reducing condensation.

Chemstar: It has a high contamination tolerance. It has a reduced frictional wear which makes for low wear and cool operation. It has accessories for corrosion protection. PTFE has coated oil case.

Now, let’s take a look at the oil-free pumps:

Standard Duty Dry Pump: This pump has several duties. It is filtration, aspiration, desiccation, replace water aspirator, vacuum drying and chamber roughing. It needs no water or oil. It is simple to adjust and monitor the vacuum level and delivery pressure. A float ball rises to sear off pump from accidental ingestion of water. The muffler makes it so it quiets the pump. It is one of the lower cost ones.

High Throughput Standard Duty Dry Pump: It has non-corrosive duties such as cell harvesting, centrifuge, filtration, aspiration and drying. It is a simple design. It is lightweight, compact and quiet. It has an oil-free continuous pumping.

GEMINI Go-Anywhere DC Vacuum Pumps: It is powerful, portable and economical. It is for lab or field usage. It has an advanced chemical resistance. The oil-free dry pump design provides top performance in an easy portable package.

Aspiration / Filtration Stations: This pumps non corrosive duties are things such as degassing, filtration, aspiration, desiccation, replace water aspirator, vacuum drying and chamber roughing. It features bleach resistant construction. It has an inline hydrophobic filter. It is portable and has a vacuum regulator.

PTFE Dry Vacuum Pumps: It has a filtration system. It is for pumping harsh vapors and gases. It has a rotary evaporation / distillation.

Dry Fast Ultra & Dry Fast Self-Cleaning Dry Vacuum Systems: It has rotary evaporators and vacuum concentrators. It has a concentrator / gel dryer system. It also has a drying apparatus. It has a PTFE for corrosion resistance. It self-cleans for a longer head life. There is a vacuum regulator. It has inlet and outlet separators. The gas ballast reduces condensation.

Gelmaster Gel Dryer Vacuum System: It is easy to use and very easy to maintain. It traps acidic vapors to minimize pollution. Gelmaster uses two pumps in one package to provide fast gel drying. A room temperature vapor pump condenses the hot vapors from the gel dryer and traps them from the rest of the vacuum system. This reduces the overall vapor load. It is as simple as connecting the vacuum line to the gel dryer and turn on the unit. The vapors are trapped in a reusable medium which eliminates pollution of lab air.

Dry Rotary Graphite Vane: This high throughput / portable vacuum is for glove box, desiccator, storage under vacuum, air sampling and material handling. It features a free air displacement and continuous duty operation.

Quiet Vacuum / Pressure Pumps: Due to its continuous duty it provides a long life. The sound insulation is built in to ensure whisper-quiet operation. There are no sliding parts so no lubrication is ever needed. The exhausted air is always clean and particle free. It is economically priced. It is ideal for environmental monitoring, air sampling and water aeration.

Now that we have taken a look at the chemical duty pumps and the oil free vacuum pumps that are offered by Welch let’s take a look at the high vacuum pumps:

Welch Direct Drive: This vacuum pump is compact, portable and is recommended for several different uses. Some of those uses are: Centrifugal concentrators, vacuum ovens, freeze dryers, SEM’s and annular spaces / transfer lines. The vacuum system has a cold trap that is recommended for use with harsh chemicals. The direct drive pumps are not recommended for filtration, aspiration or drying electrophoresis gels.

Chemstar Vacuum Pump: This is for pumping corrosive gases. It has accessories for corrosion protection. It’s vital parts are corrosion resistant. PTFE coated oil case. It has a fluoroelastomer gaskets and seals. It has nitrogen purge which degases and cools oil. It has a high contamination tolerance which means that it has a large oil capacity that dilutes contaminants.

DUOSEAL Belt Drive High Vacuum Pumps: It features a low RPM. It is low maintenance and has a long life. It has a large oil reservoir that dilutes contaminants. Some of the ways it can be used if for freeze drying, distillation, vacuum drying, neon tube manufacturing and degassing.

GEM Vacuum Pump & Systems: It has a rotary evaporation and filtration package. It also has a rugged gear pump. There are two different types. One of them is a rotary evaporation system that is for boiling points for under 130 degrees. The other one is a filtration vacuum pump system.

Compact Freeze Dryer Vacuum System: This one withstands harsh chemicals. It includes continuous acid neutralization and oil filtration. It is portable and has a quiet direct drive pump. It is effective for freeze drying samples containing harsh chemicals such as TFA, acetonitrile, HBr and others. This defends against chemical attacks through the use of integrated oil maintenance, large oil system capacity and Welch gold oil.

As you can see Welch vacuum pumps come in several different types and can meet the needs of anyone.