Product Description
Major Repair Kit with Phenolic Vanes for Welch 1400 – OEM-Equivalent
Major Repair Kit for Welch Vacuum Pumps
Part Number: 1400PP – OEM-Equivalent
Vacuum Pump Supply's OEM-equivalent Major Repair Kit with Phenolic Vanes for Welch 1400 is built for complete pump overhaul service. This kit helps restore vacuum performance, reduce downtime, and extend service life while offering a cost-effective alternative to OEM replacement parts.
Compatible Pump Models
- Welch 1400
Major Kit Includes:
- Replacement vanes
- Shaft seals and sealing components
- Gaskets
- O-rings
- Washers
- Springs
- Valve components
When Should You Rebuild This Pump?
- Reduced vacuum performance
- Slow pump-down times
- Oil leaks around seals or gaskets
- Worn or damaged vanes
- Noise, vibration, or rough operation
- Scheduled preventative maintenance interval reached
Complete Bill of Materials
The following components are included with this kit.
| Part Number | Description | Qty |
|---|---|---|
| 411056 | Washer, Welch, Duoseal, 1374, 1397, 1400, | 8 |
| 411059 | Vane, 1st Stage - Phenolic, Welch, Duoseal, | 4 |
| 411052 | Case Gasket, Beaded, Welch, Duoseal, 1399, 1400, | 1 |
| 410708 | V-Belt, Welch, Chemstar, Duoseal, 1400N, 1400, | 1 |
| 320083 | O-ring, 86 x 2.5 mm - Viton, | 1 |
| 410624 | Woodruff Key, Cut, Fisher Scientific, Welch, | 1 |
| 410613 | Woodruff Key, Cut, Welch, Chemstar, Duoseal, | 2 |
| 410578 | Shaft Seal, Metal Case, Welch, Duoseal, Chemstar, | 1 |
| 410383 | Intake Cover Gasket, Welch, Duoseal, Chemstar, 1400, 1400N, | 1 |
| 410056 | Seal Gasket, Welch, Duoseal, | 1 |
| 40010 | O-ring, 82.22 x 2.62 mm - Viton, | 1 |
| 320106 | O-ring, 25.07 x 2.62 mm - Viton, | 1 |
| 411266 | Washer, Tension, Welch, Duoseal, Models 1373, 1374, 1376, 1397, 1398, 1399, 1400, 1402, 1405, | 1 |
| 411267 | Rubber Washer, Welch, Duoseal, | 1 |
| 411304 | Spring, Welch, Duoseal, | 4 |
| 411401E-01 | Shaft Seal Kit for Welch Vacuum Pumps - 0.625" | 1 |
| 411239 | Exhaust Valve, Welch, Duoseal, Chemstar, 1399, 1400N, 1400, 1405, | 1 |
| 411150 | Retaining ring, Welch, | 1 |
| 411137 | Washer-Welch Duoseal, | 3 |
| 411063 | Spring Holder, Welch, Duoseal, Chemstar, | 2 |
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.
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 product?
Yes. This kit is supplied under the Vacuum Pump Supply brand as an OEM-equivalent option for Welch 1400.
What pump models is this compatible with?
This product is assigned to Welch 1400 based on the product categories selected for this item.
Does this kit include everything shown in the BOM?
Yes. The components listed in the bill of materials are included with this kit.
Should I change the oil during service?
Yes. Fresh vacuum pump oil is recommended whenever servicing or rebuilding a Welch rotary vane pump.
Can Vacuum Pump Supply help identify related parts?
Yes. Contact Vacuum Pump Supply with your pump model and part number if you need help confirming fit or finding related service components.
