Image: Welch
- Motor power
- 2.2 kW
- Weight
- 99 kg
Headline ratings converted to common units for comparison; the table below shows each figure exactly as published.
Technical data
Source: Welch product page · retrieved 2026-10-02| As published | 50 Hz | 50 Hz; @ 50 Hz | Without gas ballast partial | Without gas ballast total | With gas ballast total | Value | 50 Hz; (50 Hz) | 60 Hz |
|---|---|---|---|---|---|---|---|---|
| Free Air Displacement @ 50 Hz | ||||||||
| Pumping speed @ 50 Hz Pumping speed | ||||||||
| Ultimate Pressure Without gas ballast partial Ultimate pressure | ||||||||
| Ultimate Pressure Without gas ballast total Ultimate pressure | ||||||||
| Ultimate Pressure With gas ballast total Ultimate pressure | ||||||||
| Connection flanges | ||||||||
| Ambient temperature | ||||||||
| Noise Level (50 Hz) Noise level | ||||||||
| Oil Capacity | ||||||||
| Motor speed Speed | ||||||||
| Motor power | ||||||||
| Weight |
Original extracted values are shown with their source and review status. Multiple values under the same condition remain separate for review.
R a min–max range as published, not a single rating
Explore the parts
CRVpro 48, pulled apart
This model’s parts, by where they sit
Our drawing of the machine type, with the CRVpro 48's own parts from Welch's lists. Side view along the shaft. Oil-free (dry) pumps have no exhaust box oil, sight glass or oil filter; their exhaust filter is a dust filter.
Reviewed operating performance · 60 Hz
Loading reviewed performance…
Documents
- c25120 gd crvpro 4865 flyer emea v7brochure · 2 pp
- manual crvpro 48 65 gm 6 16 2020manual · 48 pp
Documents open on the manufacturer’s site.
Service parts · 113
Lubrication9
- ADT40 fine vacuum adsorption trap. With a very high affinity to Hydrocarbons to eliminate oil back-streaming705185
- Labovac 13, PFPE oil, 1 liter800131-01
- Premium vacuum pump oil, 5 liter800995-05
- Premium vacuum pump oil, 20 liters800995-20
- Premium vacuum pump oil, 200 liters800995-200
- Oil Fill PlugS3056-99
- Oil Drain PlugS3062-99
- Oil casingS3473-99
- Oil windowS3478-99
Filtration6
- PT40 separator to prevent the suction of condensates. Large collection capacity with sight glass for level monitoring700146
- ASF70 dust filter – For non-chemical application only700436
- OME85/40 Exhaust oil mist filter – With surface treatment for corrosion resistance700623
- Coupling ElementS3414-99
- FeltS3419-99
- KF40 FilterS3426-99
Seals and gaskets6
Fittings and hardware25
- ScrewS3083-99
- ScrewS3085-99
- Elastic WasherS3087-99
- ScrewS3089-99
- Elastic WasherS3092-99
- ScrewS3093-99
- Flat KeyS3106-99
- Elastic WasherS3108-99
- ScrewS3117-99
- Flat WasherS3120-99
- Anti-Suck Back SpringS3166-99
- ScrewS3178-99
- Elastic WasherS3179-99
- ScrewS3180-99
- ScrewS3303-99
- SpringS3305-99
- paper washerS3413-99
- KF40Blank flangeS3429-99
- WasherS3433-99
- WasherS3436-99
- Vane springS3456-99
- Flat washerS3467-99
- NutS3469-99
- WasherS3479-99
- nutS3482-99
Rotating parts7
Valves8
Piston and diaphragm parts2
Housing and covers6
Other parts43
- SpacerS3297-99
- pressing plateS3301-99
- SФ4Steel ballS3304-99
- Red stripS3415-99
- Right side overlayS3416-99
- 3M adhesive tapeS3418-99
- TrestleS3421-99
- RingS3422-99
- Anti-suck back PlateS3423-99
- O-ring92()x3.5S3424-99
- Inlet PortS3425-99
- O-ring42()x5.3S3427-99
- Rubber sheetS3428-99
- KF40 HoopS3430-99
- Left side overlayS3431-99
- O-ring19.5()x1.6S3437-99
- BushS3438-99
- back-up ringS3440-99
- ScrewM5*25S3442-99
- O-ring75()x2S3445-99
- Fore CRVpro 48S3447-99
- Fore CRVpro 65S3448-99
- Limiting PlateS3450-99
- ScrewM5*12S3451-99
- Oil sealTC25*40*7S3452-99
- Pin8S3453-99
- Fore CRVpro 48S3454-99
- Fore CRVpro 65S3455-99
- Fore CRVpro 48S3457-99
- Fore CRVpro 65S3458-99
- Pin8S3459-99
- ScrewCRVpro-48:M10*270S3465-99
- ScrewCRVpro-65:M10*310S3466-99
- Elastic washer10S3468-99
- Pin10S3470-99
- FlapS3472-99
- Flat washer6S3474-99
- ScrewM6*30S3475-99
- GlassS3477-99
- Exhaust PortS3480-99
Part numbers from Welch’s parts lists, shop and instruction manuals. Open a part for its other models, replacements and suppliers.
Parts diagrams
Exploded views from Welch’s own documents, with each position and part number as printed. Select a part to see what it fits, who sells it and what replaces it.
Exploded view · manual crvpro 48 65 gm 6 16 2020, page 40104 positions
The positions on this drawing haven’t been placed yet: choose a position in the list for its part. Drag to move, pinch or Ctrl + scroll to zoom.
Select a part on the drawing or in the list to see its number, what it fits and where to get it. Turn on “select several” to build one quote for many parts.
| Pos. | Part number | Description | Qty |
|---|---|---|---|
| S3412-99 | Pump fan | ||
| S3413-99 | paper washer | ||
| S3414-99 | Coupling Element | ||
| S3415-99 | Red strip | ||
| S3178-99 | Screw | ||
| S3416-99 | Right side overlay | ||
| S3179-99 | Elastic Washer | ||
| S3083-99 | Screw | ||
| S3008-99 | Foot Pad | ||
| S3417-99 | Base | ||
| S3418-99 | 3M adhesive tape | ||
| S3419-99 | Felt | ||
| S3420-99 | O-ring | ||
| S3421-99 | Trestle | ||
| S3166-99 | Anti-Suck Back Spring | ||
| S3165-99 | Anti-Suck Back Piston | ||
| S3422-99 | Ring | ||
| S3117-99 | Screw | ||
| S3164-99 | Anti-Suck Back Cover | ||
| S3423-99 | Anti-suck back Plate | ||
| S3424-99 | O-ring92()x3.5 | ||
| S3425-99 | Inlet Port | ||
| S3426-99 | KF40 Filter | ||
| S3427-99 | O-ring42()x5.3 | ||
| S3428-99 | Rubber sheet | ||
| S3429-99 | KF40Blank flange | ||
| S3430-99 | KF40 Hoop | ||
| S3089-99 | Screw | ||
| S3093-99 | Screw | ||
| S3092-99 | Elastic Washer | ||
| S3015-99 | Gas Ballast Knob | ||
| S3163-99 | Gas Ballast Location Bush | ||
| S3014-99 | Gas Ballast Valve Ring | ||
| S3303-99 | Screw | ||
| S3304-99 | SФ4Steel ball | ||
| S3305-99 | Spring | ||
| S3085-99 | Screw | ||
| S3301-99 | pressing plate | ||
| S3300-99 | Gas ballast valve bush | ||
| S3431-99 | Left side overlay | ||
| S3297-99 | Spacer | ||
| S3298-99 | short gas ballast mouth | ||
| S3432-99 | Long gas ballast mouth | ||
| S3180-99 | Screw | ||
| S3108-99 | Elastic Washer | ||
| S3433-99 | Washer | ||
| S3435-99 | Coupling | ||
| S3436-99 | Washer | ||
| S3437-99 | O-ring19.5()x1.6 | ||
| S3438-99 | Bush | ||
| S3439-99 | Oil seal TC 25*45*11 | ||
| S3440-99 | back-up ring | ||
| S3441-99 | Pump Cover | ||
| S3442-99 | ScrewM5*25 | ||
| S3443-99 | Oil Pump Rotor(in) | ||
| S3444-99 | Oil Pump Rotor(out) | ||
| S3445-99 | O-ring75()x2 | ||
| S3446-99 | Gasket | ||
| S3447-99 | Fore CRVpro 48 | ||
| S3448-99 | Fore CRVpro 65 | ||
| S3449-99 | Exhaust Valve Plate | ||
| S3450-99 | Limiting Plate | ||
| S3451-99 | ScrewM5*12 | ||
| S3452-99 | Oil sealTC25*40*7 | ||
| S3453-99 | Pin8 | ||
| S3454-99 | Fore CRVpro 48 | ||
| S3455-99 | Fore CRVpro 65 | ||
| S3106-99 | Flat Key | ||
| S3456-99 | Vane spring | ||
| S3457-99 | Fore CRVpro 48 | ||
| S3458-99 | Fore CRVpro 65 | ||
| S3459-99 | Pin8 | ||
| S3460-99 | Back Pump Vane | ||
| S3461-99 | Oil-proofing cover | ||
| S3462-99 | Rear rotor | ||
| S3463-99 | Rear Vane | ||
| S3464-99 | Rear cover | ||
| S3465-99 | ScrewCRVpro-48:M10*270 | ||
| S3466-99 | ScrewCRVpro-65:M10*310 | ||
| S3467-99 | Flat washer | ||
| S3468-99 | Elastic washer10 | ||
| S3469-99 | Nut | ||
| S3470-99 | Pin10 | ||
| S3471-99 | Oil Pump Valve | ||
| S3472-99 | Flap | ||
| S3473-99 | Oil casing | ||
| S3474-99 | Flat washer6 | ||
| S3087-99 | Elastic Washer | ||
| S3475-99 | ScrewM6*30 | ||
| S3063-99 | O-Ring | ||
| S3062-99 | Oil Drain Plug | ||
| S3476-99 | O-ring | ||
| S3477-99 | Glass | ||
| S3478-99 | Oil window | ||
| S3018-99 | O-Ring | ||
| S3056-99 | Oil Fill Plug | ||
| S3479-99 | Washer | ||
| S3480-99 | Exhaust Port | ||
| S3481-99 | KF40Centre rest | ||
| S3482-99 | nut | ||
| S3483-99 | holder | ||
| S3484-99 | Exhaust diaphragm | ||
| S3120-99 | Flat Washer | ||
| S3485-99 | ScrewM5*10 |
Positions and part numbers as printed in Welch’s manual crvpro 48 65 gm 6 16 2020, page 40 · view the source document