Product Description
Major Repair Kit for Welch DuoSeal Vacuum Pumps - OEM-Equivalent
OEM-Equivalent Welch Repair Kit from Vacuum Pump Supply
Part Number: WSK005 - OEM-Equivalent
Vacuum Pump Supply's OEM-equivalent Welch CRVpro 16 Major Kit for Welch DuoSeal Vacuum Pumps is built for service, maintenance, and repair of compatible Welch vacuum pumps. This kit helps restore pump performance, reduce downtime, and provide excellent value compared to purchasing individual components separately.
Compatible Pump Models
Compatibility is based on the Welch pump categories assigned to this product.
- Welch DuoSeal vacuum pumps assigned to this product category
What This Kit Includes
- Vanes
- Shaft seals and sealing components
- Gaskets
- O-rings
- Coupling components
When Should This Kit Be Used?
- Reduced vacuum performance
- Oil leaks or worn sealing components
- Scheduled maintenance or overhaul interval reached
- Worn vanes, gaskets, seals, or service components
- Preparing a Welch pump to return to reliable service
Complete Bill of Materials
| Part Number | Description | Qty |
|---|---|---|
| 400083 | Screw, M4x10 Lg, Philip Pan Head, Welch, CRVpro, Part# 400083 | 1 |
| 420071 | Washer, Lock, Tripod, Large, Welch, CRVpro, Part# 420071 | 1 |
| 310155 | Seal, Shaft, Mini, Welch, CRVpro, Part# 310155 | 1 |
| 26501032 | Coupling Element, Edwards, Welch, E1/E2M, CRVpro, Part# 26501032 | 1 |
| 310156 | Seal, Shaft, Double Lip- Welch CRVpro, Part# 310156 | 1 |
| 380053 | Plate, Valve, SS, Welch, CRVpro, Part# 380053 | 1 |
| 490082 | Spring, comp, CRVpro, Welch, CRVpro, Part# 490082 | 1 |
| 310157 | Seal, Shaft, Single Lip, Welch, CRVpro, CRVpro16, CRVpro24, CRVpro30, Part# 310157 | 1 |
| 490081 | Spring, Vane, CRVpro, Welch, CRVpro, Part# 490081 | 6 |
| 490080 | Spring, Compression, CRVpro, Welch, CRVpro, Part# 490080 | 1 |
| 230102G | Vane, GX, Large, CRVpro 16, Welch, CRVpro, Part# 230102G | 2 |
| 300220 | Formed O-ring, Welch CRVpro 16, 24, & 30 - Part# 300220 | 1 |
| 300219 | Gasket, Case, Welch, CRVpro, Part# 300219 | 1 |
| 410018 | Nut, Hex, M4x.7, Welch, CRVpro, Part# 410018 | 1 |
| 230099G | Vane, GX, Small, CRV Pro 16, 24, 30, Welch, CRVpro, Part# 230099G | 2 |
| 320182 | O-ring, 75 x 3.0 mm - Viton, Part# 320182 | 1 |
| 300221 | Gasket, Round, Rubber, CRV Pro 16, Welch, CRVpro, Part# 300221 | 1 |
| 320086 | O-ring, 14.5 x 1.5 mm - Viton, Part# 320086 | 1 |
| 91311690100 | O-ring, 14 x 3mm - Viton, Part# 91311690100 | 1 |
| 320540 | O-ring, 21 x 2.6 mm - FKM, Part# 320540 | 1 |
| 320541 | O-ring, 26 x 2.5 mm - FKM, Part# 320541 | 1 |
| 320114 | O-ring, 52 x 2.5 mm - Viton, Part# 320114 | 1 |
| 02124025 | O-ring, 28 x 5 mm - Viton, Part# 02124025 | 2 |
| 390027 | Valve, FKM, Top Hat, Welch, CRVpro, Part# 390027 | 1 |
| 300224 | Gasket, Ring, Welch, CRVpro, Part# 300224 | 1 |
| 390026 | Valve, Nib, FKM, Welch, CRVpro, Part# 390026 | 1 |
| 500030 | Sight Glass, Rect, CRV 16/24/30, Welch, CRVpro, Part# 500030 | 1 |
| 320539 | O-ring, Formed, Sight Glass, Part# 320539 | 1 |
Complete Welch Vacuum Pump Solutions
Whether you are rebuilding an existing pump or purchasing a replacement, Vacuum Pump Supply stocks Welch pumps, repair kits, oils, parts, and service products.
Need a New Welch Pump?
Recommended Oils & Service Products
Recommended Vacuum Pump Oil
Complete the Service with Fresh Oil
Fresh vacuum pump oil should be installed whenever servicing or rebuilding a Welch rotary vane vacuum pump. Clean oil helps protect new seals, vanes, gaskets, and internal components.
- UG19 Vacuum Pump Oil
- M68 Vacuum Pump Oil
- FF-005 Vacuum Pump Flush Fluid - useful when cleaning contaminated pumps before refill
- Vacuum Pump Oil Cross Reference Chart
Recommended Products
Why Buy from Vacuum Pump Supply?
- Vacuum pump specialists since 2006
- Over 15,000 vacuum pump parts and kits available
- OEM-equivalent replacement options
- Fast shipping on stocked products
- Technical support from vacuum pump specialists
- Trusted by manufacturers, laboratories, universities, service companies, and maintenance teams
Helpful Resources
- Vacuum Pump Oil Cross Reference Chart
- Vacuum Pump Schematics, Manuals & Repair Resources
- Rotary Vane Vacuum Pump Repair Kits & Parts
- Welch Vacuum Pump Parts & Kits
- Vacuum Pump Oil
Frequently Asked Questions
Is this an OEM-equivalent kit?
Yes. This kit is supplied under the Vacuum Pump Supply brand as an OEM-equivalent option for compatible Welch vacuum pumps.
What pump models is this compatible with?
This product is assigned to the compatible pump categories shown above: Welch DuoSeal Vacuum Pumps.
Does this kit include a BOM?
Yes. The complete bill of materials is listed above.
Should I change the oil during service?
Yes. Fresh vacuum pump oil is recommended whenever a Welch pump is serviced, resealed, or rebuilt.
Can Vacuum Pump Supply help confirm fit?
Yes. Contact Vacuum Pump Supply with your pump model and part number if you need help confirming compatibility.
