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High Pressure Solenoid Valves
DELCO High Pressure Solenoid Valves are engineered to withstand extreme operating conditions up to hundreds of bars. With reinforced bodies and special seals, these heavy-duty electromagnetic valves provide secure isolation in hydraulic systems, car washes, and compressed gas lines.
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DKKB High Pressure Solenoid Valve 250 Bar for Fluid & Gas Control
Size Range: DN08-DN50
Pressure Range: 0-400Bar
Max Temperature: 180℃
Voltage: AC/DC 12V/24V110V/220V
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DKKB Series Direct Acting High Pressure Solenoid Valve
Size Range: DN08-DN15
Pressure Range: 0-100Bar
Max Temperature: 180℃
Voltage: AC/DC 12V/24V110V/220V
High-Pressure Solenoid Valve: Extreme 300-Bar (4,350 PSI) Hydraulic & Gas Containment
Engineered for high-pressure gas test benches, compressed natural gas (CNG) dispensing skids, industrial hydraulic power units, and autoclave charging systems, the Delco high-pressure solenoid valve series provides bubble-tight shutoff under extreme hydrostatic and pneumatic stresses up to 30.0 MPa (300 bar / 4,350 psi). Utilizing forged AISI 316L stainless steel or carbon steel bodies, anti-extrusion PEEK/PCTFE seating, and pressure-balanced pilot pistons, these valves guarantee fast sub-50ms switching without seat deformation or coil burnout.
Technical Merits: High-Pressure Mechanical & Sealing Integrity
Precision CNC-machined from solid forged 316L bar stock or closed-die forgings, completely eliminating casting porosity, micro-cracks, and explosive decompression risks.
Standard rubber seals fail via gap extrusion under high differential pressure. Delco utilizes reinforced virgin PEEK and PCTFE (Kel-F) to prevent seal cold-flow and seat blowout.
Internal equalization passages cancel massive hydraulic closing forces across the piston, allowing standard low-wattage coils to actuate the valve smoothly without oversized magnets.
Certified explosion-proof coil options (Ex-d IIC T4/T6) ensure safe operation in hazardous Zone 1/2 gas areas, mandatory for CNG dispensers, hydrogen manifolds, and refinery skids.
Engineered magnetic flux circuits and high-rate return springs snap the valve closed in 20 to 50 milliseconds, protecting downstream instrumentation from pressure shocks.
Every high-pressure valve body is individually hydro-tested to 1.5 times rated working pressure (up to 45.0 MPa / 6,525 psi) to guarantee zero structural defect or shell rupture.
Technical Specifications Matrix
| Parameter | Direct Micro-Orifice | Pilot Piston Industrial | CNG Dispensing Class | Extreme 300-Bar Class |
|---|---|---|---|---|
| Nominal Bore Size | DN1 – DN6 (1/8" – 1/4") | DN10 – DN50 (3/8" – 2") | DN10 – DN25 (3/8" – 1") | DN6 – DN32 (1/4" – 1-1/4") |
| Working Pressure | 0 – 10.0 MPa (0 – 100 Bar) | 0.5 – 25.0 MPa (5 – 250 Bar) | 0.5 – 25.0 MPa (5 – 250 Bar) | 0.1 – 30.0 MPa (Up to 300 Bar) |
| Body Construction | Forged 316L / Brass CW617N | Forged Steel A105 / 316 SS | Forged AISI 316L Stainless | Forged 316L / Inconel 718 |
| Seat Sealing Material | PEEK / Synthetic Ruby / FKM | PEEK / PCTFE / Metal-to-Metal | Virgin Carbon-Filled PEEK | PCTFE / Solid Tungsten Carbide |
| Operating Temp Range | -30°C to +120°C (-22°F to 248°F) | -20°C to +150°C (-4°F to 302°F) | -40°C to +85°C (-40°F to 185°F) | -50°C to +150°C (-58°F to 302°F) |
| Min Differential (ΔP) | 0 Bar (Zero ΔP Required) | 0.5 Bar (Pilot Lift Assist) | 0.5 Bar (Pilot Operated) | 0.2 Bar (High-Force Pilot) |
| End Connections | Female NPT / G Threaded | NPT / SAE Flange / Butt Weld | Female NPT (ASME B1.20.1) | Autoclave HP Coned / NPT / Socket |
| Electrical Specifications | 24VDC, 110VAC, 220VAC (High-Power Inrush); IP65 DIN 43650 Form A; ATEX/IECEx Ex-d IIC T6 Gb; Class H (180°C) | |||
Frequently Asked Questions: High-Pressure Solenoid Valves
Q1: Why do standard elastomeric seals fail in 100+ bar high-pressure solenoid valves?
Soft rubber elastomers (NBR, EPDM, Silicone) have low shear modulus. Under differential pressures exceeding 50 to 100 bar, the elastomeric material is forced into the clearance gap between the valve seat and orifice (gap extrusion), resulting in torn, shredded seals within dozens of cycles. Delco eliminates this failure mode by utilizing high-rigidity PEEK or PCTFE polymers that resist extrusion up to 300 bar.
Q2: What is the minimum operating pressure (ΔP) required for pilot-piston high-pressure valves?
Large-orifice high-pressure valves rely on a pilot-piston mechanism. The solenoid coil opens a tiny pilot vent, and the line differential pressure pushes the main piston open. For this to occur, a minimum line differential pressure of 0.5 bar (7 psi) is required. If your line starts at complete atmospheric zero and you need high flow, a direct-acting or kick-pilot valve must be selected.
Q3: How does Delco ensure valve safety against explosive decompression in high-pressure gas service?
In high-pressure gas applications (such as CNG or hydrogen at 250 bar), gas molecules permeate into internal polymer voids. When the valve vents rapidly, trapped gas expands violently, rupturing standard O-rings (explosive decompression). Delco utilizes specialized AED (Anti-Explosive Decompression) rated FKM or solid PEEK backup rings certified to ISO 23936-2 and NORSOK M-710.
Q4: Can high-pressure solenoid valves handle hydraulic water-hammer shockwaves?
Yes. Rapid shutoff in high-pressure fluid lines can produce hydraulic water hammer peaks reaching twice the working pressure. Delco’s forged 316L and A105 valve bodies feature thick pressure-retaining wall dimensions hydrostatically rated to 1.5x design pressure (45.0 MPa / 6,525 psi proof pressure), and utilize progressive closing pilot channels to cushion hydraulic deceleration.
Direct Factory Supply: 300-Bar Industrial High-Pressure Solenoid Valves
Direct manufacturer inventory of forged 316L and carbon steel high-pressure solenoid valves. 100% factory hydrostatic shell tested to 45 MPa, helium leak checked, and certified to ATEX Ex-d IIC T6 for rapid CNG, hydraulic, and gas skid integration.