Product Description
Welch ChemStar 1402N with Explosion-Proof Motor Belt-Driven Vacuum Pump
Welch part number: 1402N-90
Factory configuration: 115 V / 60 Hz / 1-phase
Overview
The Welch ChemStar 1402N with Explosion-Proof Motor is a corrosion-resistant belt-driven rotary-vane pump for chemical-vapor applications. ChemStar wetted materials and lubricant requirements differ from standard DuoSeal service, so process chemistry and oil compatibility must be reviewed before the pump is quoted.
| 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 | 1402N-90 |
| Model | ChemStar 1402N with Explosion-Proof Motor |
| Electrical / factory configuration | 115 V / 60 Hz / 1-phase |
| Purchase status | Call for pricing and availability |
Hazardous-location note: Confirm motor classification, wiring, installation and local code requirements before ordering.
Chemical-service note: Provide the process chemistry and requested lubricant when asking for a quote.
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.
- ChemStar construction is intended for corrosive chemical-vapor service.
- Explosion-proof motor configuration requires application and code review.
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 | NW25 |
| 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 |
|---|---|---|
| 1402N-90 | 115 V / 60 Hz / 1-phase | This configuration |
| 1402N-01 | 115 V / 60 Hz / 1-phase | Call for pricing |
Maintenance, Oil & Filters
| Maintenance item | Recommended product or resource | Part number / notes |
|---|---|---|
| Vacuum pump oil | Welch Gold Oil or confirmed chemistry-compatible lubricant | Do not substitute standard mineral pump oil without reviewing the process chemistry. |
| Repair kit | 1402N ChemStar major repair kit | 1402K-10 |
| 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
Chemical-vapor service requiring both ChemStar materials and a factory explosion-proof motor after application review.
Resources
Need help confirming the correct Welch pump?
Have the required voltage, phase, frequency, inlet connection and process details ready. We will help verify the part number and application.
