Can I use these pumps for chemical applications?

Yes, but use the ADT40 trap to prevent oil back-streaming and select PFPE oil if chemical resistance is required.

Is hard wiring required?

Yes. These pumps come with 3-phase motors and must be hard-wired before use.

What oil is recommended?

Directorr™ Premium vacuum pump oil is included. PFPE oil is available for chemically aggressive environments.

Where can I get service kits?

Service kits include vanes, springs, O-rings, gaskets, and shaft seals. Order using part numbers S3405-99 (CRVpro 48) or S3406-99 (CRVpro 65).

CRVpro 48 & 65 Brochure

Rotary Vane Vacuum Pumps for Demanding Industrial Applications

If you're working with sensitive biotech samples, freeze drying processes, or thin film evaporation, you need vacuum pumps that deliver consistent performance under pressure. The Welch CRVpro 48 and CRVpro 65 are built for exactly that. These two-stage rotary vane pumps are designed to handle industrial workloads with high displacement, low ultimate pressure, and quiet operation.

Key Features

High Free Air Displacement
- CRVpro 48: 55.7 m³/h (928 l/min) @ 50 Hz
- CRVpro 65: 74.3 m³/h (1238 l/min) @ 50 Hz
Low Ultimate Pressure
- Down to 3×10⁻⁴ mbar (2×10⁻⁴ Torr) without gas ballast
Quiet Operation
- ≤58 dB(A) at 50 Hz
Robust Build
- Steel frame trolley available for roots pump systems
- Weight: ~100 kg
- Dimensions: 796 × 262 × 369 mm
Ready to Use
- Ships with Directorr™ Premium vacuum pump oil, centering rings, and clamping rings

Applications

Industrial Freeze Drying
Vacuum Coating
Thin Film Evaporation
Refrigeration & HVAC
Space Simulation

Accessories

Inlet Options

PT40 Separator (700146): Prevents condensate suction
ADT40 Trap (705185): Eliminates oil back-streaming
ASF70 Dust Filter (700436): For non-chemical use

Exhaust Options

OME85/40 Mist Filter (700623): Corrosion-resistant surface

General

Oil Drain Kit (340011)
Premium Vacuum Pump Oil: Available in 5L, 20L, 200L
PFPE Oil (Labovac 13): 1L (800131-01)

Ordering Information

Model	Standard Version	PFPE Version	Service Kit
CRVpro 48	3487T-01	—	S3405-99
CRVpro 65	3657T-01	3657T-01-03	S3406-99

Performance Insights

Both models offer optimized pumping curves for rapid evacuation. When paired with roots pumps, they reach speeds up to 400 m³/h. The motors run at 1460/1760 rpm (50/60 Hz) with 2.2 kW power, making them suitable for continuous-duty industrial use.

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FAQs

The CRVpro 65 offers higher displacement and pumping speed, making it better suited for larger systems or faster evacuation needs.

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