Centrifugalpumper

The Welch CRVpro pumps are high-performance two-stage vacuum pumps. They impress with their long service life, high reliability and low maintenance requirements. The CRVpro series are the perfect partners for freeze dryers, vacuum concentrators, Schlenklines, glove boxes and vacuum ovens, as well as industrial applications.

• Cool running operation for less oil consumption
• Coated oil case to slow metal corrosion
• Extended oil change intervals for less maintenance costs
• Dual voltage

Scope of supply: Every pump is supplied complete with Directorr™ Premium vacuum pump oil, centering rings, clamping rings and motor overload protection.

Specifications
Ultimate pressure without gas ballast partial:	5 x 10-4 mbar
Ultimate pressure without gas ballast total:	2 x 10-3 mbar
Ultimate pressure with gas ballast total:	7 x 10-2 mbar
Connection:	DN 16 KF
Motor rating 50/60Hz:	0.37/0.4 kW
Nominal speed 50/60Hz:	1450/1740 rpm
Dimensions (L x W x H):	463 x 157 x 230 mm

Accessories Accessories for CRVpro 4/6/8/16/24/30 Accessories Vacuum gauge VMpro 2 Alternative Rotary vane pump CRVpro 16/24/30 Alternative Rotary vane pumps Complete packages Basic CRVpro 2/4/6/8 Alternative Rotary vane pump Complete packages Premium CRVpro 4/6 + VMpro 2

The Welch CRVpro pumps are high-performance two-stage vacuum pumps. They impress with their long service life, high reliability and low maintenance requirements. The CRVpro series are the perfect partners for freeze dryers, vacuum concentrators, Schlenklines, glove boxes and vacuum ovens, as well as industrial applications.

• Cool running operation for less oil consumption
• Coated oil case to slow metal corrosion
• Extended oil change intervals for less maintenance costs
• Dual voltage

Scope of supply: Every pump is supplied complete with Directorr™ Premium vacuum pump oil, centering rings, clamping rings and motor overload protection.

Specifications
Ultimate pressure without gas ballast partial:	3 x 10-4 mbar
Ultimate pressure without gas ballast total:	3 x 10-3mbar
Ultimate pressure with gas ballast total:	9 x 10-2mbar
Connection:	DN 16 KF
Motor rating 50/60Hz:	0.29/0.3 kW
Nominal speed 50/60Hz:	1440/1720 rpm
Dimensions (L x W x H):	384 x 138 x 211 mm
Weight:	15 kg

Accessories Accessories for CRVpro 4/6/8/16/24/30 Alternative Rotary vane pump CRVpro 4/6/8 Alternative Rotary vane pumps Complete packages Basic CRVpro 2/4/6/8

Piston pumps are a reliable partner for physical applications, notably with aqueous solutions. Being a vacuum pump and compressor, it can be used for a wide variety of applications such as filtration, gas sampling, vacuum drying, desiccation and automation technology. The integrated vacuum and pressure gauges and regulators allow the pressure to be continuously monitored and adjusted. For use with dry or aqueous vapor applications only.

• Oil free
• Easy to clean
• Easy maintenance
• Easy handling and control features
• Robust construction
• Pressure connection with exhaust silencer
• Suction/pressure connection: hose nozzle DN 8 for hose inner diameter 8 mm

Scope of delivery: vacuum pump, vacuum and pressure regulators with gauges, inlet water trap and muffler

Specifications
Suction/pressure connection:	DN 8
Ambient temperature:	10 ... 40 °C
Max. Operating gas temperature:	60 °C
Noise DIN EN ISO 2151:	56 dB (A)
IP code:	IP 20

Vacuubrand rotary vane pumps encompass one and two stage pumps with throughputs from 2 to 9 m³/h.
Typical rotary vane pump applications include, use as a backing pump for turbomolecular pumps but also serve in diverse chemical laboratory applications.
Features and important characteristics: high water vapour tolerance, vacuum tight pumping mechanism when switched off, high performance gas ballast mechanisms. These increase the overall performance potential of these pumps, the service life of mechanical parts, increase oil-change intervals and reduce maintenance overheads.

Accessories Oil for rotary vane pumps Accessories Accessories and spare parts for rotary vane pumps Alternative  Alternative Rotary vane pump RZ 6, two-stage Alternative Rotary vane pumps RZ 6, two stage, package 1 Alternative Rotary vane pump RZ 6, two-stage, package 2 Alternative Rotary vane pump RZ 6, two-stage, package 3 Alternative  Alternative  Alternative  Alternative  Alternative

Accessories Oil for rotary vane pumps

The Rotary Vane Vacuum Pump RC 6 has been designed to minimise the adverse effects of condensable and corrosive vapours. Its main components are a two-stage rotary-vane pump and a two-stage chemistry diaphragm for optimised corrosion resistance. The diaphragm pump continuously evacuates the oil reservoir of the rotary-vane pump in order to keep the partial pressures of solvent vapours, oxygen and corrosive gases at a low level and/or below their condensation point. The RC 6 is a low-maintenance pump for freeze-drying and other applications requiring an ultimate vacuum in the 10^-3 mbar range.

Scope of supply: Pump, overload circuit breaker and mains cable (2 m), centering and clamping ring for inlet, particulate filter, operating instructions, oil (bottle of 500 ml)

Specifications
Flow rate:	6.9 m3/h
Ultimate vacuum (partial) without gas ballast:	0.0004 mbar
Ultimate vacuum (total) without gas ballast:	0.002 mbar
Ultimate vacuum (total) with gas ballast:	0.01 mbar
Oil capacity (B-Oil):	min. 0.34 l; max. 0.53 l
Inlet connection: Outlet connection:	Small flange NW 16 Hose nozzle NW 8-10mm
Motor rating:	0.3 kW
Nominal speed 50/60Hz:	1500/1800 rpm
Dimensions (L x W x H):	526 x 302 x 226 mm
Weight:	25 kg
IP code:	IP 40

VARIO^® Chemistry Pumping Units offer all the advantages of modern control technology and provide excellent possibilities for solvent recovery. They attain an ultimate vacuum down to 0.6mbar. They are exceptionally quiet in operation and entirely oil-free. Inside the pump, vapours and gases only come into contact with fluoroplastics of optimum chemical resistance.
VARIO^® Chemistry Pumping Units provide vacuum control by adaptation of motor speed. This has clear advantages compared to even the best of two-point control systems. The vacuum is continuously adjusted to actual process requirements, irrespective of apparatus size and vapour volume. Process times are typically shortened by 30%. Solvent recovery next to 100% is supported through continuous evaporation.
All VARIO^® Chemistry Pumping Units include a chemistry diaphragm vacuum pump and an integrated vacuum controller with display and vacuum sensor.

Accessories Automatic Vacuum Controller CVC 3000 Alternative Chemistry Pumping Units VARIO® select

The Welch CRVpro pumps are high-performance two-stage vacuum pumps. They impress with their long service life, high reliability and low maintenance requirements. The CRVpro series are the perfect partners for freeze dryers, vacuum concentrators, Schlenklines, glove boxes and vacuum ovens, as well as industrial applications.

• Cool running operation for less oil consumption
• Coated oil case to slow metal corrosion
• Extended oil change intervals for less maintenance costs
• Dual voltage

Scope of supply: Every pump is supplied complete with Directorr™ Premium vacuum pump oil, centering rings, clamping rings and motor overload protection.
Scope of supply: CRVpro rotary vane pump, oil mist separator AKD 16, 2-way valve, hose connector, vacuum hose (1.5 m), oil drain kit

Accessories Accessories for CRVpro 4/6/8/16/24/30 Accessories Vacuum gauge VMpro 2 Alternative Rotary vane pump CRVpro 4/6/8 Alternative Rotary vane pump CRVpro 16/24/30 Alternative Rotary vane pump Complete packages Premium CRVpro 4/6 + VMpro 2

The Welch CRVpro pumps are high-performance two-stage rotary vane pumps. They impress with their long service life, high reliability and low maintenance requirements. The CRVpro series are the perfect partners for freeze dryers, vacuum concentrators, Schlenklines, glove boxes and vacuum ovens, as well as industrial applications.

• Cool running operation for less oil consumption
• Coated oil case to slow metal corrosion
• Large oil case to reduce the risk of chemical attacks
• Anti-suck back valve
• Dual voltage

Scope of supply: every pump is supplied completely with Directorr™ Premium vacuum pump oil, centering rings, clamping rings and motor overload protection

Specifications	CRVpro 16/24/30
Ultimate vacuum (partial) without gas ballast:	3 x 10-4 mbar
Ultimate vacuum (total) without gas ballast:	3 x 10-3 mbar
Ultimate vacuum (total) with gas ballast:	6 x 10-2 mbar
Connection:	Small flange NW 25
Motor rating:	0.37/0.4 kW
Nominal speed 50/60Hz:	1450/1750 rpm
Dimensions (L x W x H):	569 x 206 x 289 mm

Accessories Accessories for CRVpro 4/6/8/16/24/30 Accessories Vacuum gauge VMpro 2 Alternative Rotary vane pump CRVpro 4/6/8 Alternative Rotary vane pumps Complete packages Basic CRVpro 2/4/6/8 Alternative Rotary vane pump Complete packages Premium CRVpro 4/6 + VMpro 2

The Welch CRVpro pumps are high-performance two-stage vacuum pumps. They impress with their long service life, high reliability and low maintenance requirements. The CRVpro series are the perfect partners for freeze dryers, vacuum concentrators, Schlenklines, glove boxes and vacuum ovens, as well as industrial applications.

• Cool running operation for less oil consumption
• Coated oil case to slow metal corrosion
• Extended oil change intervals for less maintenance costs
• Dual voltage

Scope of supply: Every pump is supplied complete with Directorr™ Premium vacuum pump oil, centering rings, clamping rings and motor overload protection.
These complete packages offer the functions of the powerful, two-stage CRVpro vacuum pumps combined with the measuring accuracy of the chemistry-resistant vacuum gauge VMpro 2.

• The CRVpro 4 rotary vane pump with a flow rate of 63 l/min is particularly suitable for use with Schlenk technology and in conjunction with freeze dryers
• The CRVpro 6 rotary vane pump with a delivery rate of 85 l/min is particularly suitable for use with the Schlenk technique and in conjunction with freeze dryers and vacuum centrifuges
• The chemical-resistant vacuum gauge VMpro 2 combines Pirani technology with a ceramic capacitance diaphragm sensor and thus provides gas-type-independent, highly accurate values for reliable pressure measurement in the measuring range between 10 mbar and atmospheric pressure

Scope of supply: Rotary vane pump CRVpro 4 or CRVpro 6, Vacuum gauge VMpro 2, 2-way ball valve, oil mist filter AKD 16, T-piece, hose connector DN16KF-10/8, vacuum hose (2.5 m), oil drain kit

Accessories Vacuum gauge VMpro 2 Accessories Accessories for CRVpro 4/6/8/16/24/30 Alternative Rotary vane pump CRVpro 4/6/8 Alternative Rotary vane pumps Complete packages Basic CRVpro 2/4/6/8 Alternative Rotary vane pump CRVpro 16/24/30

The powerful rotary vane pumps are ideal for laboratory and process applications that require a very good ultimate vacuum at medium to increased gas flow rate. Typical applications are lyophilisation, fine vacuum distillation, and drying chambers.

• High flow rate even at vacuum levels approaching ultimate vacuum
• High water vapor tolerance due to efficient gas ballast
• Very good ultimate vacuum even with gas ballast
• Vacuum-tight at switch-off without suction nozzle valve
• Long oil change intervals due to large usable oil volume
• Easy maintenance due to telescopic design

Scope of supply: Rotary vane pump, manual

Successor Rotary vane pump RZ 6, two-stage, package 3 Alternative

The powerful rotary vane pumps are ideal for laboratory and process applications that require a very good ultimate vacuum at medium to increased gas flow rate. Typical applications are lyophilisation, fine vacuum distillation, and drying chambers.

• High flow rate even at vacuum levels approaching ultimate vacuum
• High water vapor tolerance due to efficient gas ballast
• Very good ultimate vacuum even with gas ballast
• Vacuum-tight at switch-off without suction nozzle valve
• Long oil change intervals due to large usable oil volume
• Easy maintenance due to telescopic design

Scope of supply: Rotary vane pump, oil mist filter FO, butterfly valve VS 16, manual

Successor  Alternative Rotary vane pump RZ 6, two-stage Alternative

The powerful rotary vane pumps are ideal for laboratory and process applications that require a very good ultimate vacuum at medium to increased gas flow rate. Typical applications are lyophilisation, fine vacuum distillation, and drying chambers.

• High flow rate even at vacuum levels approaching ultimate vacuum
• High water vapor tolerance due to efficient gas ballast
• Very good ultimate vacuum even with gas ballast
• Vacuum-tight at switch-off without suction nozzle valve
• Long oil change intervals due to large usable oil volume
• Easy maintenance due to telescopic design

Scope of supply: Rotary vane pump, oil mist filter FO, butterfly valve VS 16, vacuum gauge DCP 3000 with vacuum sensor VSP 3000, manual

Successor Rotary vane pumps RZ 6, two stage, package 1 Alternative Rotary vane pump RZ 6, two-stage Alternative

Alternative Piston pump, complete

The powerful rotary vane pumps are ideal for laboratory and process applications that require a very good ultimate vacuum at medium to increased gas flow rate. Typical applications are lyophilisation, fine vacuum distillation, and drying chambers.

• High flow rate even at vacuum levels approaching ultimate vacuum
• High water vapor tolerance due to efficient gas ballast
• Very good ultimate vacuum even with gas ballast
• Vacuum-tight at switch-off without suction nozzle valve
• Long oil change intervals due to large usable oil volume
• Easy maintenance due to telescopic design

Scope of supply: Rotary vane pump, oil mist filter FO, butterfly valve VS 16, vacuum gauge VACUU·VIEW extended, manual

Successor  Alternative  Alternative Rotary vane pump RZ 6, two-stage

Fully equipped vacuum controller with capacitive, gas type-independent absolute pressure measurement using an alumina-ceramic diaphragm. While the base unit Vacuum Controller VACUU·SELECT^®still requires a separate vacuum control valve as an accessory, there is the fully equipped Compact controller VACUU·SELECT^®as two-point vacuum regulator with chemical suction line valve.
With connected vacuum valve the VACUU·SELECT^® automatically detects the boiling point during solvent evaporation and switches to two-point control mode. The graphical user interface offers predefined vacuum processes for all common laboratory applications. Applications, such as desired vacuum and other parameters can also be put together and controlled individually.

• Interactive, graphic touch display for easy operation
• Touchscreen display can be operated with safety gloves
• Predefined vacuum processes for reproducible results and time savings in the laboratory
• Fully automatic evaporations at the touch of a button
• Easy-to-use application editor for creating your own processes
• Integrated help function
• Integrated ventilation valve also for inert gas
• Ethernet/USB (Type A) interface
• EX approval: II 3/- G IIC T4 X Internal Atm. Only

The fully equipped basic unit without vacuum control valve can be positioned freely. A matching range of accessories offers everything for fitting into a variety of laboratory applications.

Scope of delivery: Vacuum Controller VACUU·SELECTwith integrated ceramic vacuum sensor and venting valve, fold-out stand and power supply.

Please order suction line valves separately.

Specifications
Measuring range:	0,1 ... 1080 mbar
Accuracy:	<± 1 mbar / ±1 digit (after adjustment, constant temp.)
Housing:	Plastic, good chemical resistance
Connection venting valve:	Hose nozzle DN 4-5 mm
Vacuum connection (Compact controllers only):	Hose nozzle DN 6/10 mm
Ambient temperatue range:	10 ... 40 °C
Dimensions (W x D x H):	152 x 127 x 41 mm
Weight:	0.745 kg
Power supply:	100 ... 230 V, 50/60 Hz

Accessories Accessories for Vacuum Controller VACUU·SELECT and Measuring instrument DCP 3000 Alternative Compact Vacuum Controller VACUU·SELECT®