Product Description
OEM-Equivalent 1402 Welch Adapter ,Kf25,S/S for Welch DuoSeal 1402 / Welch DuoSeal 1376 / Welch 1402 Chemstar Vacuum Pumps - 8111029
OEM-Equivalent Welch DuoSeal Replacement Part
Part Number: 8111029
This OEM-equivalent Welch DuoSeal replacement part is supplied by Vacuum Pump Supply for service, repair, and maintenance of compatible Welch vacuum pumps. It is designed to help restore performance, reduce downtime, and support reliable pump operation.
Compatible Pump Models
Compatibility is based on the pump categories assigned to this product.
- Welch DuoSeal 1402
- Welch DuoSeal 1376
- Welch 1402 Chemstar
What's Included
- 1402 Welch Adapter ,Kf25,S/S
- OEM-equivalent replacement component
- Designed for Welch vacuum pump service
Product Information
| Part Number | 8111029 |
| Description | 1402 Welch Adapter ,Kf25,S/S |
| Brand | Vacuum Pump Supply |
| Type | OEM-Equivalent Replacement Part |
When Should This Part Be Replaced?
- During routine vacuum pump service
- When the original component is worn, damaged, leaking, or missing
- When rebuilding or resealing the compatible Welch pump model
- As part of preventative maintenance before returning a pump to service
Recommended Vacuum Pump Oil
Complete the Service with Fresh Oil
Fresh vacuum pump oil should be installed whenever servicing, resealing, or rebuilding a Welch DuoSeal pump. Contaminated oil can shorten the life of new seals, vanes, gaskets, and internal pump components.
- M68 Vacuum Pump Oil - Common mineral oil choice for Welch DuoSeal belt-drive vacuum pumps
- Ultragrade 19 Vacuum Pump Oil - OEM-style oil option for Welch DuoSeal pumps
- Vacuum Pump Oil Cross Reference Chart - Match OEM oil to VPS equivalents
Recommended Products
Why Buy from Vacuum Pump Supply?
- Vacuum pump specialists since 2006
- Over 15,000 vacuum pump parts and kits available
- OEM and OEM-equivalent options
- Fast shipping on stocked products
- Technical support from vacuum pump specialists
- Trusted by laboratories, universities, manufacturers, 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 product?
Yes. This is an OEM-equivalent Welch DuoSeal product supplied by Vacuum Pump Supply.
What pumps is this used on?
This product is listed for the compatible pump model categories shown above. Always confirm your pump model and part number before ordering.
Should I change the oil during service?
Yes. Fresh vacuum pump oil is recommended whenever a pump is serviced, resealed, or rebuilt.
