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Inert Diaphragm Poppet Liquid Valves

New Proportional iDP Valve – 390 and 391 Series

The Humphrey iDP Series of aggressive media solenoid valves has expanded with the addition of the 390 and 391 proportional valves. A variable input current to its solenoid delivers a corresponding variable output to control the flow of difficult gases, chemicals and cleaning fluids.

The flexing diaphragm-poppet design isolates the solenoid element from media penetration, while the inert body material ensures compatibility, long life and sustained performance. The rugged encapsulated coil is constructed to perform in harsh and wet environments as well.

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Inert Diaphragm Poppet Liquid Valves

Humphrey iDP Diaphragm Valve Series

The 390 joins the 350 2-port and 370 3-port ON/OFF iDP valves as a complete offering to control hazardous gas and liquid applications, and constructed with common materials suitable for: 

  • Bodily fluids
  • Aggressive chemicals
  • Cleaning fluids
  • Elevated liquid temperatures

iDP Valves are field-tested and supported by years of experience in applications like kidney dialysis, analytical chemistry and hematology.

390 Series Proportional Valve Features

As the first of its kind in proportional control, the 390 and 391 uses the same diaphragm and seat arrangement as used in the field proven 2-way 350 Series.

Clients using the 390 Series can more precisely control liquid chemical flow under varying pressure conditions. Chemical dilution amounts when mixing with water can be more precise as well.

Select 390 2-port inline, direct piping type or the 391 2-port manifold mount for subbase piping.

iDP Proportional Valve Product Specs

  • Flow output proportional to current input
  • Radel body and EPDM or Viton GF® wetted materials provide broad chemical compatibility
  • Calibrated supply port pressure settings of 10, 20 and 40 PSI are standard
  • Flow rates (40 psi valves):  0-80 SLPM air or 0-1.5 SLPM water
  • Encapsulated coil for operation in wet environments
  • Fluid temperature capable – up to 203°F (95°C)

Our Online Catalog provides easy navigation to over 5,000 valve selections, each with solid model CAD files, product specifications, and support information.

Find more information on the Proportional iDP 390 Series and explore our other iDP valves here.

Our application and engineering staff will readily answer your questions, provide valve selection assistance, or discuss special modifications needed for specific applications. Call 800-477-8707 or fill out our technical services contact form for assistance

Complimentary Test & Evaluation valve samples are available for qualifying applications.