Welch CRVpro Rotary Vane Vacuum Pumps

Product Code WELCH-3061-01

AvailabilityIn stock

$3,160.00 - $7,225.00
Unit price
Shipping calculated at checkout.
Most Orders Arrive in Four Days or less.
View Shipping Info Below.
The new CRVpro family of direct drive vacuum pumps offers increased reliability and longer service interval vs. other direct drive rotary vane vacuum pumps. The CRVpro family consumes up to 36% less oil than comparable pumps. Three features drive these benefits:
  • Runs 10°C cooler than comparable pumps. Slows corrosion.
  • Has a 40% larger oil capacity than comparable pumps. Dilutes aggressive chemicals.
  • Has a chemical resistant coating in the oil case and pump module. Protects non-moving parts.

The CRVpro family includes all the features you'd expect in a direct drive rotary vane pump: gas ballast, forced oil lubrication, anti-suckback mechanism and thermal overload protection.

Suitable applications include freeze drying, degassing, vacuum ovens and concentrators.
Direct drive pumps are not recommended for filtration, aspiration, drying electrophoresis gels, or other applications requiring sustained operation above 30 torr.

Manuals and Documents

CRVpro 4-6-8 Manual
CRVpro 30 Manual
CRVpro Series Datasheet




CRVpro 4

CRVpro 6

CRVpro 8

CRVpro 30

Free air displacement


m3/h (l/min)

4 (67)

6 (10o)

8 (133)

33.1 (551)


CFM (l/min)

2.8 (78)

4.2 (118)

5.6 (158)

22.1 (627)

ultimate pressure

- Without gas ballast partial

mbar (Torr)



- Without gas ballast total

mbar (Torr)



- With gas ballast total

mbar (Torr)



Connection flanges




Hose connection, inlet*

ID Tubing

5/8"- 3/4" (16-19 mm)

3/4" (19 mm)

Ambient temperature


Noise level (50 Hz)

dB (A)



oil capacity





Motor speed

rpm 50/60Hz



Motor power

kW 50/60Hz




kg (Ibs.)

21 (46.3)

22 (48.5)

22.5 (49.6)

39.5 (87)

Dimensions, LxWxH

mm (inch)

463/157/230 (18.2/6.1/9.1)

569/206/289 (22.4/8.1/11.4)

Local Delivery

We offer delivery services for large orders to customers from Central California all the way to San Diego. Please call our sales team for more information on weekly, bi-weekly, or monthly deliveries and pricing. 626.332.7744


Shipping Time

Our main warehouse is located near Los Angeles, you can use the map below to estimate delivery time. Most orders ship one business day after the order is placed, then the transit days will follow. Below the map you will find exceptions to these rules for certain products.

HFS Shipping T

Some items we sell may be warehoused in Amazon's warehouses across the US. If the item you order happens to be in on of their warehouses it will generally arrive in 3 days. If you need to know about a specific item please feel free to contact us and we'll let you know.

Larger and heavier items have to be shipped via LTL Freight. LTL shipments tend to take longer to arrive, but they have the benefit of being much safer for heavy and delicate items. If your order has to be shipped by LTL Freight we will contact you to find out if the delivery address is a residential or commercial address, and whether a loading dock or forklift is available. The freight company will call you to arrange a delivery appointment, usually a day before.


Shipping Costs

The cost of shipping varies based on where you live, how much the order weighs, and the value of the order. We've outline our shipping guidelines below:

To Contiguous US:

Item Weight

Shipping Costs

0-50 lbs

Orders over $100 ship free;
Orders $99.99 and under are a $10 flat fee.

Over 50 lbs

The shipping cost will be automatically calculated by the system based on the weight of your items and the delivery address provided.


To Alaska, Hawaii, and other US Territories:

 Cost will be calculated by weight at time of checkout.

To Other Countries:
We currently can offer shipping service internationally.
Please contact us for international shipping cost: info@hfsusa.com

Welch CRVpro Rotary Vane Vacuum Pumps

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