Product Description
Minor Repair Kit with Buna Seal for Welch 1400 – OEM-Equivalent
Minor Repair Kit for Welch Vacuum Pumps
Part Number: 1400SB – OEM-Equivalent
Vacuum Pump Supply's OEM-equivalent Minor Repair Kit with Buna Seal for Welch 1400 is designed for light overhaul, resealing, and preventative maintenance service.
Compatible Pump Models
- Welch 1400
Kit Includes:
- Shaft seals and sealing components
- Gaskets
- O-rings
- Washers
- Springs
- Valve components
- Filter / felt components
When Should You Use This Kit?
- Oil leaks around seals or gaskets
- Routine light overhaul
- Preventative maintenance
- Pump being cleaned before return to service
- Worn sealing components
Complete Bill of Materials
The following components are included with this kit.
| Part Number | Description | Qty |
|---|---|---|
| 590021 | Machined Housing, Welch, DirecTorr, 8915A, 8920A, | 1 |
| 410643 | Shaft Seal Gasket, Fisher Scientific, | 1 |
| 619282A | O-ring, 7.65 x 1.78 mm - Viton, | 1 |
| 410056 | Seal Gasket, Welch, Duoseal, | 1 |
| 320083 | O-ring, 86 x 2.5 mm - Viton, | 1 |
| 619378 | O-ring, 82.22 x 2.62 mm - Viton, | 1 |
| 320106 | O-ring, 25.07 x 2.62 mm - Viton, | 1 |
| 410613 | Woodruff Key, Cut, Welch, Chemstar, Duoseal, | 2 |
| 410578 | Shaft Seal, Metal Case, Welch, Duoseal, Chemstar, | 1 |
| 410708 | V-Belt, Welch, Chemstar, Duoseal, 1400N, 1400, | 1 |
| 411266 | Washer, Tension, Welch, Duoseal, Models 1373, 1374, 1376, 1397, 1398, 1399, 1400, 1402, 1405, | 1 |
| 02120004 | O-ring, 6.1 x 1.6 mm - Buna, Part# 2120004 | 1 |
| 612159A | O-ring, 18.72 x 2.62 mm - Viton, | 1 |
| 400081 | SHCS,10-32 X 3/4 LG | 3 |
| 410624 | Woodruff Key, Cut, Fisher Scientific, Welch, | 1 |
| 411052 | Case Gasket, Beaded, Welch, Duoseal, 1399, 1400, | 1 |
| 2710040 | Brass Washer, #10, Welch, Chemstar, | 2 |
| 410890 | Air Filter, Welch, Chemstar, | 1 |
| 411063 | Spring Holder, Welch, Duoseal, Chemstar, | 2 |
| 410383 | Intake Cover Gasket, Welch, Duoseal, Chemstar, 1400, 1400N, | 1 |
| 411069 | Stud, Baffle, Welch, Duoseal, | 1 |
| 411304 | Spring, Welch, Duoseal, | 4 |
| 411239 | Exhaust Valve, Welch, Duoseal, Chemstar, 1399, 1400N, 1400, 1405, | 1 |
| 411150 | Retaining ring, Welch, | 1 |
| 411267 | Rubber Washer, Welch, Duoseal, | 1 |
| 310036 | Shaft Seal, Welch, DirecTorr, 8806, 8811, | 1 |
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.
