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 S201GH02C5EG5 – S20 Series Solenoid Valve, 2-Way NC, 3/4" NPT, Brass

    GC Valves S201GH02C5EG5 – S20 Series Solenoid Valve, 2-Way NC, 3/4" NPT, Brass

    $204.20
    $259.89 $204.20
    Body: Brass Size: 3/4" NPT Seal: EPDM Function: 2-Way NC
    Options
  • For Steam
    GC Valves S201GH02C5DG4 – S20 Series Solenoid Valve, 2-Way NC, 1/2" NPT, Brass

    GC Valves S201GH02C5DG4 – S20 Series Solenoid Valve, 2-Way NC, 1/2" NPT, Brass

    $186.97
    $237.97 $186.97
    Body: Brass Size: 1/2" NPT Seal: EPDM Function: 2-Way NC
    Options
  • For Steam
    GC Valves S201GH02C5CG4 – S20 Series Solenoid Valve, 2-Way NC, 3/8" NPT, Brass

    GC Valves S201GH02C5CG4 – S20 Series Solenoid Valve, 2-Way NC, 3/8" NPT, Brass

    $186.97
    $237.97 $186.97
    Body: Brass Size: 3/8" NPT Seal: EPDM Function: 2-Way NC
    Options
  • NSF Certified
    GC Valves NS202GH02CPEG5 – NS20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Reinforced Nylon

    GC Valves NS202GH02CPEG5 – NS20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Reinforced Nylon

    $263.66
    $335.56 $263.66
    Body: Reinforced Nylon Size: 3/4" NPT Seal: EPDM/Sant. Function: 2-Way NO
    Options
  • NSF Certified
    GC Valves NS202GH02CPDG4 – NS20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Reinforced Nylon

    GC Valves NS202GH02CPDG4 – NS20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Reinforced Nylon

    $260.43
    $331.46 $260.43
    Body: Reinforced Nylon Size: 1/2" NPT Seal: EPDM/Sant. Function: 2-Way NO
    Options
  • NSF Certified
    GC Valves NS202GH02CPCG4 – NS20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Reinforced Nylon

    GC Valves NS202GH02CPCG4 – NS20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Reinforced Nylon

    $260.43
    $331.46 $260.43
    Body: Reinforced Nylon Size: 3/8" NPT Seal: EPDM/Sant. Function: 2-Way NO
    Options
  • NSF Certified
    GC Valves NS202GH02C7EG5 – NS20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    GC Valves NS202GH02C7EG5 – NS20 Series Solenoid Valve, 2-Way NO, 3/4" NPT, Stainless Steel

    $560.59
    $713.48 $560.59
    Body: St. St. Size: 3/4" NPT Seal: EPDM/Sant. Function: 2-Way NO
    Options
  • NSF Certified
    GC Valves NS202GH02C7DG4 – NS20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    GC Valves NS202GH02C7DG4 – NS20 Series Solenoid Valve, 2-Way NO, 1/2" NPT, Stainless Steel

    $525.64
    $669.00 $525.64
    Body: St. St. Size: 1/2" NPT Seal: EPDM/Sant. Function: 2-Way NO
    Options
  • NSF Certified
    GC Valves NS202GH02C7CG4 – NS20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    GC Valves NS202GH02C7CG4 – NS20 Series Solenoid Valve, 2-Way NO, 3/8" NPT, Stainless Steel

    $525.64
    $669.00 $525.64
    Body: St. St. Size: 3/8" NPT Seal: EPDM/Sant. Function: 2-Way NO
    Options
  • GC Valves M205GH02V5EG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/4" NPT, Brass

    GC Valves M205GH02V5EG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/4" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/4" NPT Seal: FKM Function: 3-Way Diverting
    Options
  • GC Valves M205GH02V5DG5 – M20 Series Solenoid Valve, 3-Way Diverting, 1/2" NPT, Brass

    GC Valves M205GH02V5DG5 – M20 Series Solenoid Valve, 3-Way Diverting, 1/2" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 1/2" NPT Seal: FKM Function: 3-Way Diverting
    Options
  • GC Valves M205GH02V5CG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/8" NPT, Brass

    GC Valves M205GH02V5CG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/8" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/8" NPT Seal: FKM Function: 3-Way Diverting
    Options
  • GC Valves M205GH02N5EG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/4" NPT, Brass

    GC Valves M205GH02N5EG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/4" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/4" NPT Seal: Nitrile Function: 3-Way Diverting
    Options
  • GC Valves M205GH02N5DG5 – M20 Series Solenoid Valve, 3-Way Diverting, 1/2" NPT, Brass

    GC Valves M205GH02N5DG5 – M20 Series Solenoid Valve, 3-Way Diverting, 1/2" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 1/2" NPT Seal: Nitrile Function: 3-Way Diverting
    Options
  • GC Valves M205GH02N5CG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/8" NPT, Brass

    GC Valves M205GH02N5CG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/8" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/8" NPT Seal: Nitrile Function: 3-Way Diverting
    Options
  • For Steam
    GC Valves M205GH02C5EG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/4" NPT, Brass

    GC Valves M205GH02C5EG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/4" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/4" NPT Seal: EPDM Function: 3-Way Diverting
    Options
  • For Steam
    GC Valves M205GH02C5DG5 – M20 Series Solenoid Valve, 3-Way Diverting, 1/2" NPT, Brass

    GC Valves M205GH02C5DG5 – M20 Series Solenoid Valve, 3-Way Diverting, 1/2" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 1/2" NPT Seal: EPDM Function: 3-Way Diverting
    Options
  • For Steam
    GC Valves M205GH02C5CG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/8" NPT, Brass

    GC Valves M205GH02C5CG5 – M20 Series Solenoid Valve, 3-Way Diverting, 3/8" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/8" NPT Seal: EPDM Function: 3-Way Diverting
    Options
  • GC Valves M204GH02V5EG5 – M20 Series Solenoid Valve, 3-Way NO, 3/4" NPT, Brass

    GC Valves M204GH02V5EG5 – M20 Series Solenoid Valve, 3-Way NO, 3/4" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/4" NPT Seal: FKM Function: 3-Way NO
    Options
  • GC Valves M204GH02V5DG5 – M20 Series Solenoid Valve, 3-Way NO, 1/2" NPT, Brass

    GC Valves M204GH02V5DG5 – M20 Series Solenoid Valve, 3-Way NO, 1/2" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 1/2" NPT Seal: FKM Function: 3-Way NO
    Options
  • GC Valves M204GH02V5CG5 – M20 Series Solenoid Valve, 3-Way NO, 3/8" NPT, Brass

    GC Valves M204GH02V5CG5 – M20 Series Solenoid Valve, 3-Way NO, 3/8" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/8" NPT Seal: FKM Function: 3-Way NO
    Options
  • GC Valves M204GH02N5EG5 – M20 Series Solenoid Valve, 3-Way NO, 3/4" NPT, Brass

    GC Valves M204GH02N5EG5 – M20 Series Solenoid Valve, 3-Way NO, 3/4" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/4" NPT Seal: Nitrile Function: 3-Way NO
    Options
  • GC Valves M204GH02N5DG5 – M20 Series Solenoid Valve, 3-Way NO, 1/2" NPT, Brass

    GC Valves M204GH02N5DG5 – M20 Series Solenoid Valve, 3-Way NO, 1/2" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 1/2" NPT Seal: Nitrile Function: 3-Way NO
    Options
  • GC Valves M204GH02N5CG5 – M20 Series Solenoid Valve, 3-Way NO, 3/8" NPT, Brass

    GC Valves M204GH02N5CG5 – M20 Series Solenoid Valve, 3-Way NO, 3/8" NPT, Brass

    $514.83
    $655.24 $514.83
    Body: Brass Size: 3/8" NPT Seal: Nitrile Function: 3-Way NO
    Options