Product Description
Welch CRVpro 8 Two-Stage Rotary Vane Vacuum Pump
Welch part number: 3086E-01
Factory configuration: 115/208–230 V / 60 Hz / 1-phase explosion-proof motor
Overview
The Welch CRVpro 8 combines two-stage direct-drive rotary-vane performance with a factory explosion-proof motor. Suitability depends on the complete installation, electrical classification and local code requirements.
| Free-air displacement | Ultimate pressure | Pump design | Oil capacity |
|---|---|---|---|
| 5.6 cfm / 158 L/min | 0.0015 Torr | Two-stage direct drive | 1.0 L |
Configuration
| Field | This product |
|---|---|
| Welch part number | 3086E-01 |
| Model | CRVpro 8 |
| Electrical / factory configuration | 115/208–230 V / 60 Hz / 1-phase explosion-proof motor |
| Purchase status | Call for Pricing |
Electrical-installation note: Conduit wiring is required. Have a qualified electrician confirm voltage, motor protection, classification and local code requirements.
Features
- Two-stage direct-drive rotary-vane design provides deep vacuum in a compact footprint.
- Forced oil lubrication supports stable operation and dependable pump-module protection.
- Built-in anti-suckback protection helps prevent oil migration after power loss.
- Gas ballast supports vapor handling and routine process use.
- Protective internal coatings and a large oil capacity help reduce contamination effects.
- Explosion-proof motor is rated for Class I, Groups C & D and Class II, Groups E, F & G; the complete application must be reviewed.
Technical Specifications
| Specification | Value |
|---|---|
| Pump design | Two-stage, oil-sealed, direct-drive rotary vane |
| Free-air displacement at 60 Hz | 5.6 cfm / 158 L/min |
| Ultimate pressure | 0.0015 Torr |
| Pump speed at 60 Hz | 1740 rpm |
| Noise level | 50 dBA |
| Oil capacity | 1.0 L |
| Inlet / exhaust flange | NW16 |
| Recommended tubing ID | 5/8–3/4 in ID |
| Approximate weight | 49.6 lb |
| Approximate dimensions (L × W × H) | 18.2 × 6.1 × 9.2 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 |
|---|---|---|
| 3081-01 | 115 V / 60 Hz / 1-phase | Call for Pricing |
| 3082-01 | 230 V / 50–60 Hz / 1-phase | Call for Pricing |
| 3081-02 | 115 V / 60 Hz / 1-phase; 3/4 in flare fitting | Call for Pricing |
| 3087T-01 | 208–230/460 V / 60 Hz / 3-phase | Call for Pricing |
| 3086E-01 | 115/208–230 V / 60 Hz / 1-phase explosion-proof motor | This configuration |
| 3082-80 | 220 V / 50 Hz / 1-phase chemical-duty package | Call for Pricing |
Maintenance, Oil & Filters
| Maintenance item | Recommended product or resource | Part number / notes |
|---|---|---|
| Vacuum pump oil | Welch Premium Oil or verified VPS equivalent | Confirm viscosity, process gas and material compatibility before substituting oil. |
| Repair kit | CRVpro 8 major repair kit | WSK004 |
| Exhaust / oil filtration | Email us to confirm the correct filter | 1417P-8 standard exhaust filter; 1417E drainback option; confirm flange and installation before ordering. |
| Resource Center | Welch Vacuum Pump Resource Center | VPS-owned cross references, repair parts and maintenance guidance. |
Applications
Freeze drying, vacuum ovens, Schlenk lines, vacuum concentration, backing turbomolecular pumps, degassing and vessel or chamber evacuation. Direct-drive pumps are not recommended for sustained operation above 30 Torr.
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.
