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Two-stage rotary vane pumps

Welch’s two-stage rotary vane pumps are always an option when an ultimate pressure level from 0.5 mbar to 1x10-4 mbar is required. Depending on the pump model the pumping speed range lies between 1.8 m³/h and 60 m³/h.

CRVpro Series:

The new product series CRVpro provides highest reliability for stable operation and long product lifespan. Customers benefit from a reduced risk of chemical attacks and oil breakdown by diluting aggressive chemicals with a larger oil chamber. Its cool running characteristic also slows down any corrosion process. Additionally a chemical resistant coating protects the stationary components.

Furthermore the CRVpro also enables extended oil change intervals for less maintenance costs. Less oil consumption is a result of the cool running operation and the extended usability of oil based on a high dilution effect because of a larger oil chamber. Moreover, the low weight, flexible handle and compact design of the pump makes the rotary vane pump a portable and flexible partner in laboratories and industrial applications. With its low sound level the CRVpro series ensures that users work in a calm surrounding.

The wide range of accessories, such as separator and oil mist filter allows the customer to design their own pump based on individual needs. Welch also offers pre-defined accessory packages for different kinds of applications based on long term application experience. When it comes to services like oil exchanges, users benefit from a smart pump design which allows for a simple disassembly and reassembly of the pump.

Additional to the standard pump models, Welch offers customized rotary vane pumps if specific solutions are needed.

P-Z Series:

These pumps are characterized by their high water vapor tolerance and reliability. Due to their design they withstand large amounts of water vapor in the vacuum pump’s inlet vapor stream. This “water vapor tolerance” is the maximum inlet pressure point at which the pump is able to operate with pure water/fluids and at the same time prevents them of condensing inside the pump. Moreover, the low weight, flexible handle and compact design of the pump makes the rotary vane pump a portable and flexible partner in laboratories and industrial applications. With its low sound level the P-Z series ensure that users work in a calm surrounding. 

All two-stage rotary vane pumps from Welch are delivered ready to work with an anti-suck back valve, oil charging, gas ballast valve, centering ring and clamping ring for easy installation on your application and motor overload protection.

Applications: Vacuum oven, Backing pump for high vacuum systems, Industrial Applications, Vacuum manifold (Schlenk line), Freeze drying (Lyophilisation), Glove boxes, Vacuum Concentrator, HVAC

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