ZQDF Zero Differential Pressure Steam 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.
ZQDF Zero Differential Pressure Steam 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
ZQDF Zero Differential Pressure Steam Solenoid Valve is specially designed for steam pipeline control. It features zero pressure difference opening function, applicable to low-pressure and no-pressure steam working conditions.
With reliable piston structure and high temperature resistant parts, it runs steadily in high temperature environment. Widely used in heating system, boiler equipment, industrial steam pipeline and other automatic on-off control fields.
General Specifications
| Parameter | Specification | Remarks |
|---|---|---|
| Model | ZQDF Series (Step-by-Step Direct-Acting) | 2/2 way |
| Operation Type | Step-by-Step Direct-Acting (pilot + direct combined) | Zero differential pressure start – unaffected by condensate |
| Control Type | Normally Closed (standard) / Normally Open (optional) | Customizable |
| Body Material | Stainless Steel SUS304 / Brass / Cast Iron | Corrosion resistant option |
| Sealing Material | PTFE (Polytetrafluoroethylene) | High temperature resistance |
| Suitable Media | Saturated steam (≤180℃), superheated steam (≤220℃), high-temperature gas, air, water, light oil (≤4°E) | |
| Nominal Pressure | 1.6 MPa (16 bar) | |
| Working Pressure Differential (DN15-50) | 0 ~ 1.6 MPa (0-16 bar) | Zero differential start |
| Working Pressure Differential (DN65-100) | 0.05 ~ 1.6 MPa | Minimum differential required for larger sizes |
| Media Temperature | -5℃ ~ +220℃ (depending on model) | ZQDF-2: ≤180℃ (saturated steam); ZQDF-3: ≤220℃ (superheated steam) |
| Ambient Temperature | -40℃ ~ +60℃ | |
| Port Size Range | DN15 (1/2") ~ DN100 (4") | |
| Connection Type | Threaded (G) / Flanged | |
| Operating Voltage | AC220V, DC24V (standard); AC110V, AC380V, AC24V, DC12V available | |
| Power Consumption | AC ≤70VA / DC ≤60W | |
| Protection Rating | IP54 (standard) / IP65 (optional) | Iron shell coil protection |
| Insulation Class | Class H | High heat resistance |
| Explosion-Proof Rating | dIIBT4 (optional) | Explosion-proof version available |
| Leakage Rate | Per JB/T7352-94 standard | Zero leakage under rated conditions |
| Service Life | Per JB/T7352-94 standard | |
| Special Feature | Condensate-resistant design | Unaffected by steam condensate |
Dimensions – Threaded Connection
| Model | Connection | DN | L (mm) | H (mm) | Cv Value |
|---|---|---|---|---|---|
| ZQDF-15 | G1/2" | 15 | 82 | 150 | 3.73 |
| ZQDF-20 | G3/4" | 20 | 101 | 192 | 7 |
| ZQDF-25 | G1" | 25 | 110 | 195 | 11.1 |
| ZQDF-32 | G1¼" | 32 | 118 | 206 | 14 |
| ZQDF-40 | G1½" | 40 | 125 | 209 | 24.5 |
| ZQDF-50 | G2" | 50 | 128 | 225 | 35 |
Temperature Rating by Sub-Model
| Model | Media Type | Temperature Range |
|---|---|---|
| ZQDF-1 | Gas, Air | ≤60℃ |
| ZQDF-2 | Saturated Steam | ≤180℃ |
| ZQDF-3 | Superheated Steam / High-Temp Gas | ≤220℃ |
| ZQDF-1Y | Water, Oil Liquid | ≤60℃ |
| ZQDF-2Y | Hot Water | ≤180℃ |
| ZQDF-3Y | High-Temp Water, Oil | ≤220℃ |
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:
✅Zero pressure start design, can open normally with no pressure difference.
✅Excellent high temperature resistance, stable for steam medium.
✅Precise high-temperature sealing, tight closure and no leakage.
✅Optimized flow channel, large flow rate and smooth circulation.
✅High temperature resistant coil, good heat dissipation, long service life.
✅Simple structure, easy installation, stable and low failure rate. |
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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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