Product Description
Welch DuoSeal 1402 Refrigeration Duty Belt-Driven Vacuum Pump
Welch part number: 1402B-46
Factory configuration: 115 V / 60 Hz / 1-phase; 3/4 in ID flare inlet
Overview
The Welch DuoSeal 1402 Refrigeration Duty is a factory refrigeration-service configuration of the 1402 belt-driven pump. It combines the familiar DuoSeal oil-sealed mechanism with a service connection selected for refrigeration and recovery work.
| Pumping speed | Ultimate pressure | Pump design | Oil capacity |
|---|---|---|---|
| 5.6 cfm / 160 L/min | 1 × 10⁻⁴ Torr | Two-stage | 2.1 L |
Configuration
| Field | This product |
|---|---|
| Welch part number | 1402B-46 |
| Model | DuoSeal 1402 Refrigeration Duty |
| Electrical / factory configuration | 115 V / 60 Hz / 1-phase; 3/4 in ID flare inlet |
| Purchase status | Call for pricing and availability |
Features
- Low-speed belt drive supports smooth operation and long service life.
- Oil-sealed rotary-vane mechanism provides dependable vacuum performance.
- Serviceable construction supports routine seal, vane and gasket replacement.
- Factory motor and inlet configuration is identified by the exact Welch part number.
- Refrigeration-duty inlet connection is supplied for recovery and service work.
Technical Specifications
| Specification | Value |
|---|---|
| Pump design | Two-stage |
| Free-air displacement | 5.6 cfm / 160 L/min |
| Ultimate pressure | 1 × 10⁻⁴ Torr |
| Pump speed | 525 rpm |
| Oil capacity | 2.1 L |
| Motor rating | 0.5 hp |
| Inlet connection | 3/4 in ID flare inlet |
| Approximate weight | 132 lb |
| Approximate dimensions (L × W × H) | 20 × 12 × 15 in |
Published performance is nominal and may vary with motor frequency, condition, lubricant, process gas and measurement method. Confirm the exact part number before ordering.
Available Configurations
| Welch part number | Electrical / factory configuration | Availability |
|---|---|---|
| 1402B-46 | 115 V / 60 Hz / 1-phase; 3/4 in ID flare inlet | This configuration |
Maintenance, Oil & Filters
| Maintenance item | Recommended product or resource | Part number / notes |
|---|---|---|
| Vacuum pump oil | Welch DuoSeal / Gold Oil or verified VPS equivalent | Verify viscosity, process and material compatibility before substituting oil. |
| Repair kit | 1402 major repair kit | 1402PI |
| Exhaust filtration | Disposable exhaust filter for 1402 / 1376 | VPSF-1402; confirm fit and connection before ordering |
| Resource Center | Welch Vacuum Pump Resource Center | VPS-owned cross references, parts and maintenance guidance. |
Applications
Refrigeration service, recovery equipment, evacuation and process support using the specified inlet connection.
Resources
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