1/4 Inch High Purity Stainless Steel Pneumatic Diaphragm Valve - 31 MPa Pressure, 100K Cycle Life
High purity stainless steel pneumatic diaphragm valve designed for demanding industrial applications requiring superior leak-tight performance and corrosion resistance.
- Maximum working pressure up to 31 MPa (4500 psig)
- Fully wrapped valve seat design for superior anti-expansion and anti-contamination
- Nickel cobalt alloy diaphragm for enhanced durability and corrosion resistance
- Surface roughness options: Ra0.25μm (BA grade) or electropolished Ra0.13μm (EP grade)
- Helium test leakage rate < 1 × 10⁻⁹ std cm³/s
- Optional pneumatic actuator available
- Pneumatic valve service life up to 100,000 cycles
| Parameter | Value |
|---|---|
| Port Size | 1/4" |
| Discharge Coefficient (Cv) | 0.2 |
| Maximum Working Pressure - Manual | 310 bar (4500 psig) |
| Maximum Working Pressure - Pneumatic | 206 bar (3000 psig) |
| Working Pressure - Pneumatic Actuator | 4.2-6.2 bar (60-90 psig) |
| Working Temperature (PCTFE) | -23 to 65℃ (-10 to 150℉) |
| Leakage Rate (Helium) - Internal | ≤1×10⁻⁹ mbar l/s |
| Leakage Rate (Helium) - External | ≤1×10⁻⁹ mbar l/s |
| Pressure Drop | Air Flow (l/min) | Water Flow (l/min) |
|---|---|---|
| 0.68 bar (10 psig) | 64 | 2.4 |
| 3.4 bar (50 psig) | 170 | 5.4 |
| 6.8 bar (100 psig) | 300 | 7.6 |
All welded joints cleaned according to company standard specifications. No suffix required when ordering.
Specialized cleaning and packaging for oxygen environments. Meets ASTM G93C cleanliness requirements. Add -O2 suffix to order number.
Controlled surface finish with electropolishing Ra0.13μm. Deionized water ultrasonic cleaning. Add -EP suffix to order number.
| Component | Material |
|---|---|
| Handle | Aluminium |
| Actuator | Aluminium |
| Valve Stem | 304 Stainless Steel |
| Bonnet | S17400 Stainless Steel |
| Bonnet Nut | 316 Stainless Steel |
| Button | Brass |
| Diaphragm | Nickel Cobalt Alloy |
| Valve Seat | PCTFE |
| Valve Body | 316L Stainless Steel |
| Order Number | Port Type & Size | Dimensions (in/mm) |
|---|---|---|
| WV4H-6L-TW4- | 1/4" Tube-W | A: 0.44 (11.2), B: 0.30 (7.6), C: 1.12 (28.6), L: 1.81 (45.9) |
| WV4H-6L-FR4- | 1/4" FA-MCR | A: 0.44 (11.2), B: 0.86 (21.8), C: 1.12 (28.6), L: 2.85 (72.3) |
| WV4H-6L-MR4- | 1/4" MA-MCR1/4 | A: 0.44 (11.2), B: 0.58 (14.9), C: 1.12 (28.6), L: 2.85 (72.3) |
| WV4H-6L-TF4- | OD | A: 0.44 (11.2), B: 0.70 (17.9), C: 1.12 (28.6), L: 2.85 (72.3) |
Ideal for handling special gases used in CVD deposition, sputtering, and etching processes including silane, ammonia, phosphine, nitrous oxide, NF3, and high purity inert gases.
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