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

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 two-stage pump is designed for pumping and compressing gases and vapours and generate vacuum e.g. for rotary evaporators, vacuum ovens and vacuum filtration. Their electrical conductivity prevents electrostatic charging and minimizes the risk of the gas mixture igniting inside the pump.

• For tubes with ID = 8 mm
• Chemically resistant
• Resistant to aggressive solvents and acid vapours
• Elastomer diaphragms with PTFE layer
• Pump and connection heads are carbon fibre reinforced
• Integrated motor protection switch
• Vibration isolating feet

Scope of delivery: 2-head chemical diaphragm pump, external power supply and device connection cable with plug (EU, UK).

Specification
Pump speed 50 / 60 Hz:	16.7 / 18.3 l/min
Final vacuum (abs.):	< 8 mbar
Suction / pressure connection:	Hose nozzle DN 8
Noise:	< 44 dB(A)
Motor power:	60 W
Voltage / frequency:	230 V / 50/60 Hz
Dimensions (W x D x H):	225 x 195 x 147 mm
Weight:	6.5 kg
IP code:	IP 54

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

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

Alternative Piston pump, complete

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 three-stage pump is designed for pumping and compressing gases and vapours and generate vacuum e.g. for rotary evaporators, vacuum ovens and turbomolecular pumps. Their electrical conductivity prevents electrostatic charging and minimizes the risk of the gas mixture igniting inside the pump.

• For tubes with ID = 8 mm
• Chemically resistant
• Resistant to aggressive solvents and acid vapours
• Elastomer diaphragms with PTFE layer
• Pump and connection heads are carbon fibre reinforced
• Integrated motor protection switch
• Vibration isolating feet

Scope of delivery: 4-head chemical diaphragm pump, external power supply and device connection cable with plug (EU, UK).

Specification
Pump speed 50 / 60 Hz:	75.0 / 81.7 l/min
Final vacuum (abs.):	< 2 mbar
Suction / pressure connection:	Hose nozzle DN 8
Noise:	< 44 dB(A)
Motor power:	370 W
Voltage / frequency:	230 V / 50/60 Hz 230/400 V / 50/60 Hz
Dimensions (W x D x H):	380 x 230 x 170 mm
Weight:	18.3 kg
IP code:	IP 54

Measures and displays vacuum pressure both graphically and digitally from 1100 to 1 mbar. Controlling the pressure can be done in real-time. The durable, chemically resistant sensor built into the VCpro 601 vacuum controller is a ceramic thick film hybrid. The sensor reading is gas independent and gives an absolute pressure.

• Precise vacuum control with timed ramp capability
• Fully programmable modes to allow run repeatability
• Intuitive ICON-navigation of control screens
• Connectivity through LAN and RS232
• Built-in function for self-cleaning of diaphragm pump
• Security levels for administrators and users
• Log files on all pump activities for easy traceability
• High-Res display with dark and light screen modes
• Digital and analogue vacuum pressure display
• Automatic destillation control
• Can be used with diaphragm or piston pumps from any manufacturer

Specifications
Vacuum Pressure Control Range:	1 ... 1100 mbar
Pressure Reading Accuracy:	<± 0.3 % of full scale
Control Accuracy:	± 1 mbar
Power Consumption:	40 W
Operating Temperature Range:	15 ... 30 °C
Suction / pressure connection: Inert Gas Port to Release Valve:	DN8 (6,35 mm ID) DN4 (3,2 mm ID)
Dimensions (W x D x H):	195 x 178 x 105 mm
Weight:	1.5 kg
IP code:	IP 20

Designed especially for solvent distillation / evaporation applications, the LVS ecoflex+ systems comprise of a chemical duty diaphragm pump with VCpro digital vacuum controller, liquid separators and exhaust emissions condenser for optimal solvent recovery. Designed for chemical applications all wetted parts are made from high quality chemically resistant materials, with clear plastic coated glassware. The VCpro digital vacuum controller with ecoflex control philosophy continuously adjusts the pumping speed to match the vapour load produced by the evaporation process to give a fast and efficient process without bumping or foaming.

• Analytically pure, oil free vacuum
• Highly chemical resistant
• Ultra quiet operation - silent at equilibrium
• Precise vacuum control with timed ramp capability
• Fully programmable modes to allow run repeatability
• Ecoflex vacuum control for optimised evaporation and energy efficiency
• Intuitive ICON-navigation of control screens
• Connectivity through LAN and RS232
• Built-in self-cleaning function
• Security levels for administrators and users
• Log files on all pump activities for easy traceability
• High-Res display with dark and light screen modes
• Digital and analogue vacuum pressure display

Specifications
Pump speed 50/60 Hz:
Final vacuum (abs.):	2 mbar
Operating Temperature Range:	15 ... 30 °C
Suction / pressure connection: Inert Gas Port to Release Valve:	DN8 DN4
Noise:
IP code:	IP 20

The MPC 090 E diaphragm pump has been specially developed for vacuum filtration and solid phase extraction (SPE) and is used for single funnel filtrations and with multiple filtration devices and desiccators. A built-in vacuum fine adjustment valve and pressure gauge allow variable adjustment of the applied vacuum, while the built in catch pot prevents accidental ingestion of liquid into the pump.

• Chemically resistant to the common aggressive solvent and acid vapours in laboratories
• All parts in contact with gas are made of PTFE or PTFE compounds
• The pump and connection heads are carbon fibre-reinforced and electrically conductive
• Clean vacuum generation due to 100 % oil-free operation
• Ultra quiet operation
• Maintenance-free
• Suitable for field use with optional adapter

Scope of supply: Diaphragm pump, hose shaft DN 6, exhaust air damper, power adapter, connection adapter EU and UK

Specifications
Pump speed:	13 l/min
Ultimate vacuum:	100 mbar
Suction / pressure connection:	DN 6
Noise level:	<45 dB(A)
Dimensions (W x D x H):	144 x 198 x 244 mm
Weight:	2.7 kg
Power supply:	90 ... 260 V AC, 50/60 Hz, 18 V DC
IP code:	IP 44

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 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. The digital display ensures easy monitoring of the vacuum and shows the current measuring principle.

Scope of supply: Vacuum gauge VMpro 2, AC/DC power adapter with EU and UK plug adapters, connection cable

Specifications
Measuring range:	1500 ... 5 x 10-5 mbar
Accuracy:	5 x 10-4 ... 1 x 10-3 mbar ±50 % / 1 x 10-3 ... 100 mbar±15 % / 100 ...  950 mbar ±5 % / 950 ...1050 mbar ±2,5 %
Reproducibility:	1 x 10-3 ... 1100 mbar ±2 %
Max. pressure:	10 bar
Vacuum connection:	DN 16 KF
Permissible ambient temperature:	10 ... 50 °C
Max. ambient humidity:	65 %
Dimensions (W x D x H):	159 x 45 x 28 mm
Weight:	120 g
Power supply:	100 ... 240 V, 50/60 Hz