Welch CRVPro 4 Rotary Vane Vacuum Pump

The Welch CRVPro family of vacuum pumps are two-stage, oil sealed rotary vane vacuum pumps that include all of the features you would expect in a direct drive rotary vane pump: a gas ballast, forced oil lubrication, anti-suckback mechanism, thermal overload protection, and more. The CRVPro series provides the latest technology in rotary vane vacuum pumps, operating at 10°C cooler than other direct drive oil sealed vacuum pumps. This allows for less reaction to the oil from contaminants and less oil consumption as well. The lower operating temperature keeps the oil more viscous, limiting oil mist from the exhaust.

The CRVPro series of pumps also feature a PTFE lined oil case and black oxide coated module for increased chemical resistance. Both coatings act to slow metal corrosion and when coupled with foreline traps, extend the service intervals. These pumps have a 40% larger oil capacity than comparable pumps, which dilutes aggressive chemicals more efficiently. The Welch CRVPro series of vacuum pumps can be used for applications such as freeze drying, vacuum ovens, schlenk lines, backing turbo molecular pumps, degassing, vessel/chamber evacuation, and more. With an exceptionally quiet noise level and the highest reliability for stable operation and long product lifespan, the Welch CRVPro series of pumps provide an excellent, economical starting point for labs looking tor each deep vacuum levels.

Welch CRVPro 4 Rotary Vane Vacuum Pump Specifications

Peak Pumping Speed	2.8 CFM (78 L/min) @ 60Hz
Ultimate Vacuum (Without Gas Ballast)	2x10^-3 mbar (1.5x10^-3 Torr)
Ultimate Vacuum (Without Gas Ballast Partial)	5x10^-4 mbar (4x10^-4 Torr)
Ultimate Vacuum (With Gas Ballast Total)	7x10^-2 mbar (5x10^-2 Torr)
Ambient Operating Temperature	10°C to 40°C
Motor Speed	1740 RPM @ 60Hz
Motor Power	0.4 kW @ 60Hz
Noise Level	50 dB (A)
Oil Capacity	1150 ml
Dimensions (L x W x H)	18.2 x 6.1 x 9.1 in. (46.3 x 15.7 x 23 cm)
Weight	46.3 lbs. (21 kg)
Electrical Requirements	115V, 60Hz, 1Ph

Comparison of Models

Specification	CRVPro 4	CRVPro 6	CRVPro 8
Peak Pumping Speed	2.8 CFM (78 L/min) @ 60Hz	4.2 CFM (118 L/min) @ 60Hz	5.6 CFM (158 L/min) @ 60Hz
Ultimate Vacuum (Without Gas Ballast)	2x10^-3 mbar (1.5x10^-3 Torr)	2x10^-3 mbar (1.5x10^-3 Torr)	2x10^-3 mbar (1.5x10^-3 Torr)
Ultimate Vacuum (With Gas Ballast Total)	7x10^-2 mbar (5x10^-2 Torr)	7x10^-2 mbar (5x10^-2 Torr)	7x10^-2 mbar (5x10^-2 Torr)
Ambient Operating Temperature	10°C to 40°C	10°C to 40°C	10°C to 40°C
Motor Speed	1740 RPM @ 60Hz	1740 RPM @ 60Hz	1740 RPM @ 60Hz
Motor Power	0.4 kW @ 60Hz	0.4 kW @ 60Hz	0.4 kW @ 60Hz
Oil Capacity	1150 ml	1150 ml	1000 ml
Electrical Requirements	115V, 60Hz, 1Ph	115V, 60Hz, 1Ph	115V, 60Hz, 1Ph