Zero Pressure Differential

Zero pressure differential solenoid valves, 3/8” to 2" NPT, for air, water, light oils, and steam. S20, S30, and S27 series with UL, CSA, CE, NEMA 4/4X, NEMA 7/9 explosion proof and NSF-61 approved for drinking water with options in normally closed and normally open versions, in 316 stainless steel, brass, and Nylon 6. Approvals vary by model

Direct-acting and piloted piston solenoid valves can operate at pressures as low as 0 psi in smaller sizes. For larger flows, Solenoid Valves Mart offers GC Valves high-flow models up to 2" pipe size for pressure differentials under 5 psi. Typical applications include:

  • Atmospheric and gravity-fed tank drains
  • Closed-loop cooling systems
  • Low-pressure gas, including UL Safety Rated valves
  • Irrigation systems.

Let us know if you need assistance finding your specific model number.

862 products

  • For Steam
    GC Valves S202GH02E7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    GC Valves S202GH02E7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    $509.49
    $648.43 $509.49
    Body: St. St. Size: 3/8" NPT Seal: EPDM Function: 2-Way NO
    Options
  • GC Valves S202GH02CPEG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Reinforced Nylon

    GC Valves S202GH02CPEG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Reinforced Nylon

    $229.26
    $291.79 $229.26
    Body: Reinforced Nylon Size: 3/4" NPT Seal: EPDM Function: 2-Way NO
    Options
  • GC Valves S202GH02CPDG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Reinforced Nylon

    GC Valves S202GH02CPDG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Reinforced Nylon

    $226.44
    $288.21 $226.44
    Body: Reinforced Nylon Size: 1/2" NPT Seal: EPDM Function: 2-Way NO
    Options
  • GC Valves S202GH02CPCG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Reinforced Nylon

    GC Valves S202GH02CPCG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Reinforced Nylon

    $226.44
    $288.21 $226.44
    Body: Reinforced Nylon Size: 3/8" NPT Seal: EPDM Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02C7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    GC Valves S202GH02C7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    $519.07
    $660.63 $519.07
    Body: St. St. Size: 3/4" NPT Seal: EPDM Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02C7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    GC Valves S202GH02C7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    $486.71
    $619.45 $486.71
    Body: St. St. Size: 1/2" NPT Seal: EPDM Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02C7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    GC Valves S202GH02C7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    $486.71
    $619.45 $486.71
    Body: St. St. Size: 3/8" NPT Seal: EPDM Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02C5EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Brass

    GC Valves S202GH02C5EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Brass

    $318.11
    $404.88 $318.11
    Body: Brass Size: 3/4" NPT Seal: EPDM Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02C5DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Brass

    GC Valves S202GH02C5DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Brass

    $313.47
    $398.96 $313.47
    Body: Brass Size: 1/2" NPT Seal: EPDM Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02C5CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Brass

    GC Valves S202GH02C5CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Brass

    $313.47
    $398.96 $313.47
    Body: Brass Size: 3/8" NPT Seal: EPDM Function: 2-Way NO
    Options
  • GC Valves S201GH02VPFG9 – S20 Series Solenoid Valve, 2-Way NC, 1" NPT, Reinforced Nylon

    GC Valves S201GH02VPFG9 – S20 Series Solenoid Valve, 2-Way NC, 1" NPT, Reinforced Nylon

    $252.50
    $321.37 $252.50
    Body: Reinforced Nylon Size: 1" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02VPEG5 – S20 Series Solenoid Valve, 2-Way NC, 3/4" NPT, Reinforced Nylon

    GC Valves S201GH02VPEG5 – S20 Series Solenoid Valve, 2-Way NC, 3/4" NPT, Reinforced Nylon

    $171.03
    $217.68 $171.03
    Body: Reinforced Nylon Size: 3/4" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02VPDG4 – S20 Series Solenoid Valve, 2-Way NC, 1/2" NPT, Reinforced Nylon

    GC Valves S201GH02VPDG4 – S20 Series Solenoid Valve, 2-Way NC, 1/2" NPT, Reinforced Nylon

    $158.80
    $202.11 $158.80
    Body: Reinforced Nylon Size: 1/2" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02VPCG4 – S20 Series Solenoid Valve, 2-Way NC, 3/8" NPT, Reinforced Nylon

    GC Valves S201GH02VPCG4 – S20 Series Solenoid Valve, 2-Way NC, 3/8" NPT, Reinforced Nylon

    $158.80
    $202.11 $158.80
    Body: Reinforced Nylon Size: 3/8" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V7HJ2 – S20 Series Solenoid Valve, 2-Way NC, 1 1/2" NPT, Stainless Steel

    GC Valves S201GH02V7HJ2 – S20 Series Solenoid Valve, 2-Way NC, 1 1/2" NPT, Stainless Steel

    $1,261.91
    $1,606.07 $1,261.91
    Body: St. St. Size: 1 1/2" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V7GJ2 – S20 Series Solenoid Valve, 2-Way NC, 1 1/4" NPT, Stainless Steel

    GC Valves S201GH02V7GJ2 – S20 Series Solenoid Valve, 2-Way NC, 1 1/4" NPT, Stainless Steel

    $1,232.06
    $1,568.07 $1,232.06
    Body: St. St. Size: 1 1/4" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V7FG9 – S20 Series Solenoid Valve, 2-Way NC, 1" NPT, Stainless Steel

    GC Valves S201GH02V7FG9 – S20 Series Solenoid Valve, 2-Way NC, 1" NPT, Stainless Steel

    $1,036.90
    $1,319.69 $1,036.90
    Body: St. St. Size: 1" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V7EG5 – S20 Series Solenoid Valve, 2-Way NC, 3/4" NPT, Stainless Steel

    GC Valves S201GH02V7EG5 – S20 Series Solenoid Valve, 2-Way NC, 3/4" NPT, Stainless Steel

    $442.09
    $562.66 $442.09
    Body: St. St. Size: 3/4" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V7DG4 – S20 Series Solenoid Valve, 2-Way NC, 1/2" NPT, Stainless Steel

    GC Valves S201GH02V7DG4 – S20 Series Solenoid Valve, 2-Way NC, 1/2" NPT, Stainless Steel

    $407.49
    $518.61 $407.49
    Body: St. St. Size: 1/2" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V7CG4 – S20 Series Solenoid Valve, 2-Way NC, 3/8" NPT, Stainless Steel

    GC Valves S201GH02V7CG4 – S20 Series Solenoid Valve, 2-Way NC, 3/8" NPT, Stainless Steel

    $407.49
    $518.61 $407.49
    Body: St. St. Size: 3/8" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V5HJ2 – S20 Series Solenoid Valve, 2-Way NC, 1 1/2" NPT, Brass

    GC Valves S201GH02V5HJ2 – S20 Series Solenoid Valve, 2-Way NC, 1 1/2" NPT, Brass

    $566.94
    $721.56 $566.94
    Body: Brass Size: 1 1/2" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V5GJ2 – S20 Series Solenoid Valve, 2-Way NC, 1 1/4" NPT, Brass

    GC Valves S201GH02V5GJ2 – S20 Series Solenoid Valve, 2-Way NC, 1 1/4" NPT, Brass

    $558.60
    $710.95 $558.60
    Body: Brass Size: 1 1/4" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V5FG9 – S20 Series Solenoid Valve, 2-Way NC, 1" NPT, Brass

    GC Valves S201GH02V5FG9 – S20 Series Solenoid Valve, 2-Way NC, 1" NPT, Brass

    $387.17
    $492.77 $387.17
    Body: Brass Size: 1" NPT Seal: FKM Function: 2-Way NC
    Options
  • GC Valves S201GH02V5EG5 – S20 Series Solenoid Valve, 2-Way NC, 3/4" NPT, Brass

    GC Valves S201GH02V5EG5 – S20 Series Solenoid Valve, 2-Way NC, 3/4" NPT, Brass

    $241.49
    $307.34 $241.49
    Body: Brass Size: 3/4" NPT Seal: FKM Function: 2-Way NC
    Options