2-way Pilot Operated Diaphragm Solenoid Valves


These 2-way general-purpose solenoid valves are piloted diaphragm construction and are available in normally closed and normally open operating modes. They are available in a variety of pipe connections from 3/8″ to 2 ” NPT and are available with an extensive range of options. This series is widely used in various industrial applications. For special applications, contact the scientific department at Valcor Engineering.


The SV321 & SV421 series are suitable for a broad range of industrial applications. Typical applications include:

  • Commercial water filtration and utilities systems
  • Hot water / steam systems
  • Process control and production piping
  • General on-off control of water, oil, and gas
  • Gas and liquid distribution systems
  • Economical choice for OEM applications


  • Minimum operating pressures required
  • Wide selection of construction materials allow for use on a variety of fluids
  • AC and DC solenoid coils in a wide range of standard voltages
  • NEMA4 as standard coil enclosure, NEMA7 Explosion proof and others available
  • Pressures rating of up to 250 psi
  • Mountable in any position
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