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

  • GC Valves S202GH02V7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    GC Valves S202GH02V7DG4 – 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: FKM Function: 2-Way NO
    Options
  • GC Valves S202GH02V7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    GC Valves S202GH02V7CG4 – 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: FKM Function: 2-Way NO
    Options
  • GC Valves S202GH02V5EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Brass

    GC Valves S202GH02V5EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Brass

    $318.11
    $404.88 $318.11
    Body: Brass Size: 3/4" NPT Seal: FKM Function: 2-Way NO
    Options
  • GC Valves S202GH02V5DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Brass

    GC Valves S202GH02V5DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Brass

    $313.47
    $398.96 $313.47
    Body: Brass Size: 1/2" NPT Seal: FKM Function: 2-Way NO
    Options
  • GC Valves S202GH02V5CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Brass

    GC Valves S202GH02V5CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Brass

    $313.47
    $398.96 $313.47
    Body: Brass Size: 3/8" NPT Seal: FKM Function: 2-Way NO
    Options
  • GC Valves S202GH02NPEG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Reinforced Nylon

    GC Valves S202GH02NPEG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Reinforced Nylon

    $192.30
    $244.75 $192.30
    Body: Reinforced Nylon Size: 3/4" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02NPDG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Reinforced Nylon

    GC Valves S202GH02NPDG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Reinforced Nylon

    $189.51
    $241.19 $189.51
    Body: Reinforced Nylon Size: 1/2" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02NPCG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Reinforced Nylon

    GC Valves S202GH02NPCG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Reinforced Nylon

    $189.51
    $241.19 $189.51
    Body: Reinforced Nylon Size: 3/8" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02N7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    GC Valves S202GH02N7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    $487.70
    $620.71 $487.70
    Body: St. St. Size: 3/4" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02N7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    GC Valves S202GH02N7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    $456.89
    $581.49 $456.89
    Body: St. St. Size: 1/2" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02N7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    GC Valves S202GH02N7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    $456.89
    $581.49 $456.89
    Body: St. St. Size: 3/8" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02N5EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Brass

    GC Valves S202GH02N5EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Brass

    $295.00
    $375.46 $295.00
    Body: Brass Size: 3/4" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02N5DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Brass

    GC Valves S202GH02N5DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Brass

    $274.97
    $349.96 $274.97
    Body: Brass Size: 1/2" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02N5CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Brass

    GC Valves S202GH02N5CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Brass

    $274.97
    $349.96 $274.97
    Body: Brass Size: 3/8" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02L7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    GC Valves S202GH02L7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    $541.67
    $689.41 $541.67
    Body: St. St. Size: 3/4" NPT Seal: FKM Function: 2-Way NO
    Options
  • GC Valves S202GH02L7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    GC Valves S202GH02L7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    $509.49
    $648.43 $509.49
    Body: St. St. Size: 1/2" NPT Seal: FKM Function: 2-Way NO
    Options
  • GC Valves S202GH02L7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    GC Valves S202GH02L7CG4 – 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: FKM Function: 2-Way NO
    Options
  • GC Valves S202GH02J7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    GC Valves S202GH02J7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    $510.46
    $649.67 $510.46
    Body: St. St. Size: 3/4" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02J7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    GC Valves S202GH02J7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    $479.80
    $610.66 $479.80
    Body: St. St. Size: 1/2" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • GC Valves S202GH02J7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    GC Valves S202GH02J7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    $479.80
    $610.66 $479.80
    Body: St. St. Size: 3/8" NPT Seal: Nitrile Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02G7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    GC Valves S202GH02G7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    $509.49
    $648.43 $509.49
    Body: St. St. Size: 1/2" NPT Seal: GFLT Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02G7CG4 – S20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    GC Valves S202GH02G7CG4 – 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: GFLT Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02E7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    GC Valves S202GH02E7EG5 – S20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    $541.67
    $689.41 $541.67
    Body: St. St. Size: 3/4" NPT Seal: EPDM Function: 2-Way NO
    Options
  • For Steam
    GC Valves S202GH02E7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    GC Valves S202GH02E7DG4 – S20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    $509.49
    $648.43 $509.49
    Body: St. St. Size: 1/2" NPT Seal: EPDM Function: 2-Way NO
    Options