SV320 & SV420 2-way Zero Differential Solenoid Valves


These 2-way piloted diaphragm solenoid valves are designed to operate at zero differential pressure. These sturdy construction valves are capable of handling a wide range of fluids with an operating pressure range of 0 to 200 PSI. For special applications, contact your Valcor Scientific customer service representative.


The SV320 & SV420 series are suitable for a broad range of industrial applications. Typical applications include:

  • Tank drain valves
  • Process control and production piping
  • General on-off control of water, oil, and gas
  • Gas and liquid distribution systems
  • Economical choice for OEM applications


  • Zero differential pilot operated construction
  • Differential pressures down to zero PSI
  • Wide selection of construction materials allow for use on a variety of fluids
  • Interchangeable 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 200 psi
  • Mountable in any position


  • Operating Mode Normally Closed: Open when energized, closed when de-energized
  • Normally Open : Closed when energized, open when de-energized.
  • Port Size (in.) 3/8, 1/2, 3/4, 1, 1 1/4, 1 1/2
  • Temperature Ratings Ambient Temp.-40°F to 150°F max. with Class F Coil
  • 175°F max. with Class H Coil.
  • Fluid Temp. See specifications, next page
  • Mounting Position Mounts in any position (Best position is solenoid upright and vertical)
  • Agency Listings UL Listed, CSA Approved by order
  • Options Manual override, mounting bracket, neon lamp, surge suppressor
  • Body Brass, 303 stainless steel
  • Seals PKM, Buna N, Ethylene propylene
  • Internal Metal Parts 303 and 430F stainless steel
  • Standard Voltages AC 24V 60Hz
  • AC 110V 50Hz AC 120V 60Hz
  • AC 220V 50Hz AC 240V 60Hz
  • DC 12V, DC 24V
  • Voltage Tolerance +10% to -15% of applicable voltage
  • Standard Coil Housings Standard: Watertight NEMA 4
  • Options : Explosion proof NEMA 7, DIN, conduit, grommet, open frame, junction box
  • Coil Class F and H
  • Lead Length 24 inch

*Consult the factory for specifications other than those listed above

Category: Scientific and General Purpose Solenoid Valves