STH31 Water Inlet Brass High Pressure Solenoid Valve
We Mainly do Pneumatic Cylinder, solenoid valve, pneumatic valve, air treatment units, quick connection fittings and PU tube . Our 4V. 3V.2V.2p .solenoid valve ,and 4A.3A Pneumatic valve sell so hot in Asia, Europe,and Middle East. We are popular in pneumatic and Hydraulic market. Our accessories taked from the same supplier as Airtac.
STH31 Water Inlet Brass High Pressure Solenoid Valve
Basic Info:
We Mainly do Pneumatic Cylinder, solenoid valve, pneumatic valve, air treatment units, quick connection fittings and PU tube .
Our 4V. 3V.2V.2p .solenoid valve ,and 4A.3A Pneumatic valve sell so hot in Asia, Europe,and Middle East.
We are popular in pneumatic and Hydraulic market. Our accessories taked from the same supplier as Airtac.
Product Overview
STH31 Water Inlet Brass High Pressure Solenoid Valve is dedicated to high pressure water inlet control. It boasts outstanding pressure resistance and stable performance, adapting to various harsh pipeline environments.
It is widely applied in water supply systems, industrial equipment, plumbing facilities and water treatment devices for automatic on-off control of inlet water.
General Specifications
| Parameter | Specification | Remarks |
|---|---|---|
| Model | STH31 Series | For water inlet / medium-high pressure pipelines |
| Principle | Pilot-operated piston | Requires min differential pressure |
| Valve Function | 2/2-way | Normally closed as standard |
| Body Material | Brass | Cost-effective & corrosion resistant |
| Piston Material | Brass / Stainless Steel | Wear-resistant, suitable for high frequency |
| Seal Material | NBR / EPDM / FKM / PTFE | NBR/EPDM recommended for water |
| Media | Water, air, light oil | Suitable for tap water, hydraulic oil |
| Working Pressure | 0.05 ~ 1.6 MPa (0.5-16 bar) | Requires minimum start pressure |
| Flow Orifice Size | 15mm / 20mm / 25mm | Covers DN15 to DN25 |
| Connection Thread | G1/2" / G3/4" / G1" (NPT optional) | Standard pipe threads |
| Media Temperature | -20℃ ~ +180℃ (dependent on seal) | PTFE seals for high temperature |
| Operating Voltage | AC220V / DC24V | Other voltages available |
| Protection Rating | IP65 (DIN junction box) | Dustproof & waterproof |
| Installation | Coil vertically upward | Recommended for proper operation |
Dimensions & Specifications by Size
| Connection (G/NPT) | DN | Valve Dimensions (L×W×H mm) | Cv Value | Max Pressure |
|---|---|---|---|---|
| 1/2" | 15 | 68 × 48 × 125 | 4.5 | 0.03~7.5MPa |
| 3/4" | 15 | 68 × 48 × 125 | 4.5 | 0.03~7.5MPa |
| 1" | 25 | 96 × 70 × 145 | 12 | 0.03~7.5MPa |
| 1¼" | 32 | 150 × 135 × 170 | 25 | 0.03~7.5MPa |
| 1½" | 40 | 160 × 145 × 180 | 31 | 0.03~7.5MPa |
| 2" | 50 | 185 × 155 × 210 | 50 | 0.03~7.5MPa |
Temperature Ratings by Seal Material
| Sealing Material | Temperature Range | Suitable Media |
|---|---|---|
| NBR | -20℃ ~ +80℃ | Air, water, natural gas |
| EPDM | -40℃ ~ +120℃ | Hot water |
| VITON / PTFE | -50℃ ~ +260℃ | Oil, hot water, low-pressure steam |
Specification Selection Table (G1/8" Connection)
| Orifice (mm) | Kv Value (m³/h) | Max Pressure - AC (bar) | Max Pressure - DC (bar) | Brass Model |
|---|---|---|---|---|
| 1.5 | 0.07 | 13 | 11 | STGV1-A3-11X |
| 2.0 | 0.14 | 11 | 9 | STGV1-02-11X |
| 2.5 | 0.21 | 9 | 7 | STGV1-A4-11X |
| 3.0 | 0.25 | 6 | 4 | STGV1-03-11X |
| 4.0 | 0.35 | 3.5 | 2 | STGV1-04-11X |
(X = Seal code: N=NBR, E=EPDM, V=FKM, F=Special material)
Sealing Materials & Temperature Range
| Seal Code | Sealing Material | Fluid Temperature | Suitable Media |
|---|---|---|---|
| X=N | NBR | -20℃ ~ 80℃ | Air, water, natural gas |
| X=E | EPDM | -20℃ ~ 135℃ | Hot water |
| X=V | VITON | -10℃ ~ 155℃ | Hot oil, hot water |
Model & Specification Table (G/NPT Thread Connections)
| Port Size | Orifice (mm) | Flow (Cv) | Pressure Rating |
|---|---|---|---|
| 1/2" | 15 | 4.5 | 0.3~16 Bar |
| 3/4" | 20 | 7.6 | 0.3~16 Bar |
| 1" | 25 | 12 | 0.3~16 Bar |
| 1½" | 40 | 19.2 | 0.3~16 Bar |
| 2" | 50 | 24 | 0.3~16 Bar |
Electrical Specifications
| Voltage | Coil Power | Operating Current | Coil Model | Connection Type |
|---|---|---|---|---|
| AC220V | 9VA | 0.04A | BA11 | Junction box |
| DC24V | 8W | 0.35A | BA11 | Junction box |
| AC110V | 9VA | 0.82A | BA11 | Junction box |
| DC12V | 8W | 1.68A | BA11 | Junction box |
| AC24V | 9VA | 0.375A | BA12 | 300mm lead wires |
| AC36V | 9VA | 0.25A | BA12 | 300mm lead wires |
Quick Selection Guide
| Nominal Diameter | Pipe Size | Recommended Model |
|---|---|---|
| DN10 | 3/8" | 2W-15-31X |
| DN15 | 1/2" | 2W-15-41X |
| DN20 | 3/4" | 2W-20-51X |
| DN25 | 1" | 2W-25-61X |
| DN32 | 1-1/4" | 2W-32-71X |
| DN40 | 1-1/2" | 2W-40-81X |
| DN50 | 2" | 2W-50-91X |
Media & Seal Material Selection
|
Selection Tips
1, Voltage Matching: AC220V is for standard mains power; DC24V/12V are better for industrial control, vehicle, and low-voltage systems. Always confirm the coil voltage to avoid burnout. 2,Temperature Limits: The seal material determines the maximum operating temperature. For example, NBR (80°C max) is not suitable for continuous use in hot water above 80°C, as it will degrade and leak. 3,Media Compatibility: Oily media requires VITON seals, as NBR will swell and fail in oil. Steam applications should use VITON or higher-grade seals. 4,Size Consistency: Always match the valve size to your pipe's nominal diameter. Using a smaller valve will restrict flow and shorten its lifespan.
Supplementary Key Points (3 Points Summary)
✅PTFE Seal UpgradePTFE sealing is newly upgraded, with temperature resistance up to 260℃, excellent resistance to strong acid, alkali and organic solvents, ideal for chemical and high-temperature steam working conditions.
✅Dual Power OptionsIt provides dual power specifications: 22VA/30VA for AC and 17W/24W for DC, matching different coil types and adaptable to customers' various power load requirements.
✅Model Code RuleThe letter X in the model stands for sealing material code: N=NBR, E=EPDM, V=VITON; just replace it directly when ordering.
Our Advantages:
✅Premium brass valve body, sturdy, pressure-resistant and anti-aging
✅Reinforced internal structure, stable operation under high water pressure
✅High-performance sealing elements, effectively prevent water leakage
✅Quick response and smooth switching, suitable for frequent use
✅Reliable insulated coil, continuous operation with long service life
✅Standard thread interface, easy installation and convenient maintenance |
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When selecting a stainless steel pneumatic air gripper cylinder, consider factors such as gripping force, stroke length, operating pressure, compatibility with the object size and weight, and the specific environmental conditions of your application. It is advisable to consult the manufacturer's specifications and guidelines to ensure the proper selection, installation, and operation of the gripper cylinder for your specific requirements.
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