Product Description
Major Repair Kit for Welch 1405 OLD Style - 1405PI - OEM Equivalent
Repair Kit for Welch - OEM Equivalent
OEM-equivalent replacement, not manufactured by Welch, supplied by Vacuum Pump Supply.
Compatible Pump Models
- 1405 OLD Style
- 1405
When Should You Rebuild or Service the Pump?
- Reduced vacuum performance
- Slow pump-down times
- Oil leaks or worn sealing components
- Excessive exhaust smoke or oil mist
- Worn or damaged internal components
- Scheduled preventative maintenance interval reached
Complete Welch Vacuum Pump Solutions
Vacuum Pump Supply stocks OEM-equivalent Welch repair kits, filters, vanes, gaskets, seals, bearings, and service parts for pump maintenance and rebuild work.
Welch Parts & Resources
Recommended Service Products
Why Buy from Vacuum Pump Supply?
- Vacuum pump specialists since 2006
- Over 15,000 vacuum pump parts and kits available
- OEM-equivalent replacement parts for hard-to-find vacuum pump models
- Fast shipping on stocked products
- Technical support from vacuum pump specialists
- Trusted by manufacturers, laboratories, universities, service companies, and maintenance teams
Frequently Asked Questions
Is this an OEM Welch product?
No. This is an OEM-equivalent product supplied by Vacuum Pump Supply.
What is the part number?
The part number is 1405PI.
Can Vacuum Pump Supply help identify the correct part?
Yes. If you are unsure whether this is the correct product for your pump, contact Vacuum Pump Supply with your pump model and any existing part numbers.
Kit Includes
Vanes
- Vane, 2nd Stage - Cast Iron, Welch, Duoseal, Part# 411294IRON — Qty 4
Gaskets
- Center Plate Cover Gasket, Welch, Duoseal, Part# 411178 — Qty 1
- Chamber Gasket- Welch, Duoseal, Part# 411308 — Qty 2
O-Rings & Seals
- Rubber Washer, Welch, Duoseal, Part# 411267 — Qty 2
- Tension Washer, Welch Duoseal 1373, 1374, 1376, 1397, 1398, 1399, 1400, 1402, 1405, Part# 411266 — Qty 2
- Exhaust Valve, Welch, Duoseal, Chemstar, 1399, 1400N, 1400, 1405, Part# 411239 — Qty 1
- Woodruff Key, Cut, Welch, Chemstar, Duoseal, Part# 410613 — Qty 2
- V-Belt, Welch, Duoseal, 1373, 1405, Part# 410710 — Qty 1
- Washer, Welch, Duoseal, Part# 411165 — Qty 2
- Spring Holder, Welch, Duoseal, Part# 411303 — Qty 2
- Spring, Welch Duoseal, Part# 411304 — Qty 4
- Shaft Seal Kit for Welch Vacuum Pumps - 0.625" — Qty 1
Springs & Clips
- Retaining ring, Welch, Part# 411150 — Qty 1
Drive & Mechanical
- Woodruff Key, Cut, Fisher Scientific, Welch, Part# 410624 — Qty 2
Complete Bill of Materials
| Part Number | Description | Qty |
|---|---|---|
| 411267 | Rubber Washer, Welch, Duoseal, Part# 411267 | 2 |
| 411294IRON | Vane, 2nd Stage - Cast Iron, Welch, Duoseal, Part# 411294IRON | 4 |
| 411266 | Tension Washer, Welch Duoseal 1373, 1374, 1376, 1397, 1398, 1399, 1400, 1402, 1405, Part# 411266 | 2 |
| 411239 | Exhaust Valve, Welch, Duoseal, Chemstar, 1399, 1400N, 1400, 1405, Part# 411239 | 1 |
| 410613 | Woodruff Key, Cut, Welch, Chemstar, Duoseal, Part# 410613 | 2 |
| 410624 | Woodruff Key, Cut, Fisher Scientific, Welch, Part# 410624 | 2 |
| 410710 | V-Belt, Welch, Duoseal, 1373, 1405, Part# 410710 | 1 |
| 411150 | Retaining ring, Welch, Part# 411150 | 1 |
| 411165 | Washer, Welch, Duoseal, Part# 411165 | 2 |
| 411178 | Center Plate Cover Gasket, Welch, Duoseal, Part# 411178 | 1 |
| 411303 | Spring Holder, Welch, Duoseal, Part# 411303 | 2 |
| 411304 | Spring, Welch Duoseal, Part# 411304 | 4 |
| 411308 | Chamber Gasket- Welch, Duoseal, Part# 411308 | 2 |
| 411401E-01 | Shaft Seal Kit for Welch Vacuum Pumps - 0.625" | 1 |
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