CEM Evaporator W-303B

3-Way Mixing Valve and Evaporator

  • Accurately controlled gas/liquid mixture
  • Fast response
  • High reproducibility
  • Very stable vapor flow
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CEM EvaporatorW-303B

3-way Mixing Valve and Evaporator

Bronkhorst® model W-303B CEM 3-way Mixing Valve and Evaporator is suited for precise vapor flow delivery, composed by mixing up to 1200 g/h H2O (3200 g/h IPA) with max. 100 ln/min of carrier gas at operating pressures between vacuum and 100 bar. The temperature controlled mixing device is used in combination with  a (thermal or Coriolis) liquid flow meter and an MFC for carrier gas, together forming a Controlled Evaporation and Mixing (CEM) System.

Technical specifications

Measurement / control system
Max. heating temperature200 °C
Heater capacity1000 W
Max. Kv-value6,6 x 10-2
Mechanical parts
Material (wetted parts)Stainless steel 316L or comparable
Pressure rating (PN)100 bar a
Max. ΔP5 ... 40 bar d
(depends on Kv-value; contact your distributor for details)
Process connectionsGas and liquid inlet: compression type or face seal couplings;
Vapour outlet: 1/4" tube (other options on request);
Purge connection: 1/8" OD or 1/8" face seal
Protection classIP40
PlungerKalrez®; other on request
ConnectorAmphenol 6-pin male
Electrical properties
Power supplyMixing valve: +/-15…24 Vdc;
Heater: 110-120 Vac or 220-240 Vac
Max. power consumptionMixing valve: 4 W (max.);
Heater: 1375 W (nominal)
Electrical connection
Control valve options
External actuator options to be connected to the controller
Certification for hazardous areas
Approvals / certificates

Technical specifications subject to change without notice.

For dimensional drawings and hook-up diagrams please visit the product page on our website


CEM brochure
Manual CEM Controlled Evaporator and Mixer
Hook-up diagrams
Dimensional drawings
Dimensional Drawing W303B
Dimensions CEM Outlet Adapters