Welch Belt-drive vacuum pumps are known for their ruggedness world-wide in the most demanding applications.
Rugged oil seal pumps for a wide variety of vacuum needs, including Schlenk drying lines, freeze drying, degassing, concentrations, distillations, and more. Pull drive enables low rpm operation by reducing friction, oil temperature, and oil degradation. Its large oil reservoir minimizes contamination effects and extends maintenance intervals. Single stage pumps should not operate continuously above 50 torr. Two stage pumps should not operate continuously above 10 torr.
Key features making these pumps so reliable and durable:
Low pump rpm to reduce frictional wear while minimizing reservoir temperature to lessen chemical activity
High oil feed to pump models leads to cleanest oil lubricating the internal pump module
Large oil reservoirs dilute contaminants ingested into the pump
Belt-drive vacuum pump are available in three types: DUOSEAL, CHEMSTAR and CAPTURE.
DUOSEAL vacuum pumps are used in most common lab and industrial applications. DUOSEAL pumps are available in 6 models of two-stage vacuum pumps and 2 models of one-stage pumps.
CHEMSTAR pumps are designed to tolerate harsh chemical contamination with vital parts corrosion resistant and uses Welch Gold oil, a synthetic pump oil designed to resist chemical attack.
CAPTURE pump is used for refrigerant recovery and transfer.
On special requests, both DUOSEAL and CHEMSTAR vacuum pumps can be fomblinized for oxygen service.
Welch vacuum pump oil is specifically formulated for the unique needs of vacuum pumps. Use of non-Welch vacuum pump oil voids any performance claims and product warranties.
- In Duoseal belt driven rotary vane pumps, use Welch Duoseal or Welch Gold Oil
- In CRVpro rotary vane pumps use Welch premium or Welch gold oil
- In Chemstar belt driven rotary vane pumps use Welch gold oil
Applications: Schlenk lines, freeze dryers, glove boxes, degassing, vacuum ovens, high boiling point distillations, HVAC service.
