Gland Form: Bolt pressing type
Plug Form: Single seat valve
Size: 3/4″~8″
Nominal Pressure: PN1.6, 2.5, 4.0, 6.4MPa
Sealing Packing: V type PTFE packing
Using Medium: Steam, water, oil, gas
Temperature Control Range: 0 ~ 250°C
The series of pneumatic piston cut-off valves produced by the company belong to the execution unit in the combination instrument. The valve receives the signal from the regulating instrument and controls the cut-off and connection of the fluid in the process pipeline. This series of valves have the advantages of novel design, small flow resistance, large rated flow coefficient, large allowable pressure difference, good sealing performance, etc. Therefore, this product is widely used in the automatic control and remote control system of production process of petroleum, chemical industry, metallurgy, electric power, light textile and other industrial sectors.
| Z | Actuator |
| Z series shut-off valve | H: Pneumatic piston actuator J: Pneumatic film actuator R: Electric 3410L actuator D: Electric PSL actuator |
| H | Structural Style |
| Q Shut-off valve | P: Standard single seat shut-off valve PF: Soft seal single seat shut-off valve PG: Single seat shut-off valve with heat dissipation PV: Bellows type single seat shut-off valve PD: Low temperature single seat shut-off valve M: Standard type sleeve cut-off valve MF: Soft seal sleeve cut-off valve MG: Sleeve shut-off valve with heat dissipation MV: Bellows type sleeve cut-off valve MD: Low temperature sleeve shut-off valve |
| Component | Material |
| Body | HT200, QT450, WCB, 304, 316, 316L |
| Plug | 304, 316, 316L |
| Seat | 304, 316, 316L |
| Stem | 304, 316, 316L |
| Actuator Material | ZG230-450 (WCB) |
| Packing | PTFE, Flexible Graphite |
| Piston | ZAISi12 |
Note: The conventional material is carbon steel and stainless steel, and the special material requlating valve products can be customized according to the user’s work conditions.
| DN (mm) / NPS (in) | 20 / 3/4″ | 25 / 1″ | 32 / 1-1/4″ | 40 / 1-1/2″ | 50 / 2″ | 65 / 2-1/2″ | 80 / 3″ | 100 / 4″ | 125 / 5″ | 150 / 6″ | 200 / 8″ | |
| Nominal Pressure (MPa) | PN1.6, 2.5, 4.0, 6.4 | |||||||||||
| Rated flow coeffcient | Single Seat (Kv) | 7 | 11 | 20 | 30 | 48 | 75 | 120 | 190 | 300 | 480 | 760 |
| Sleeve (Kv) | 8 | 11 | 20 | 30 | 48 | 75 | 120 | 190 | 300 | 480 | 760 | |
| Tee (Kv) | 8 | 12 | 17 | 29 | 43 | 70 | 110 | 165 | 275 | 440 | 690 | |
| Rated Travel (mm) | 8 | 12 | 20 | 25 | 40 | 60 | ||||||
| Effective Piston Area (cm²) | 150 | 175 | 305 | 700 | 1245 | |||||||
| Allowable Leakage | Hard Seal | General: 10⁻⁴ valve rated capacity; seal type: single seat: 1.2×10⁻⁷ | ||||||||||
| Soft Seal | VI Class | |||||||||||
| Allowable Differential Pressure (MPa) | Positive Effect | 5.09 | 2.91 | 1.85 | 2.18 | 1.33 | 1.52 | 0.99 | 0.62 | 0.6 | 0.69 | 0.39 |
| Counter Action | 6.4 | 3.88 | 2.47 | 2.91 | 1.77 | 2.03 | 1.32 | 0.83 | 0.8 | 0.92 | 0.52 | |
| Signal Pressure (kPa) | 0 or 400–600 | |||||||||||
| Bonnet Form | The standard type (-17~+250°C), high temperature (+250~+450°C), low temperature (-40~–196°C), bellows seal type (-40~+350°C) | |||||||||||
| Gland Type | Bolt compression type | |||||||||||
| Sealing Packing | V type PTFE packing, impregnated PTFE packing, asbestos braided packing, flexible graphite | |||||||||||
| Plug Form | Single seat cone valve, sleeve double seat valve core and three-way structure | |||||||||||
| Flow Characteristics | Quick opening characteristic | |||||||||||
| Optional Accessories | Hand-wheel mechanism, limit switch, solenoid valve, valve position transmitter, pneumatic accelerator lock up valve, other | |||||||||||
| Nominal Diameter (mm/in) | 20 / 3/4″ | 25 / 1″ | 32 / 1-1/4″ | 40 / 1-1/2″ | 50 / 2″ | 65 / 2-1/2″ | 80 / 3″ | 100 / 4″ | 125 / 5″ | 150 / 6″ | 200 / 8″ | |
| A | 125 | 160 | 200 | 250 | 320 | |||||||
| L | PN16 | 150 | 160 | 180 | 200 | 230 | 290 | 310 | 350 | 400 | 480 | 600 |
| H | 53 | 58 | 70 | 75 | 83 | 93 | 100 | 110 | 125 | 143 | 170 | |
| H1 | 220 | 220 | 235 | 235 | 240 | 250 | 260 | 265 | 350 | 400 | 500 | |
| H2 | 120 | 120 | 120 | 155 | 155 | 200 | 200 | 200 | 230 | 230 | 230 | |
| Nominal Diameter (mm/in) | 20 / 3/4″ | 25 / 1″ | 32 / 1-1/4″ | 40 / 1-1/2″ | 50 / 2″ | 65 / 2-1/2″ | 80 / 3″ | 100 / 4″ | 125 / 5″ | 150 / 6″ | 200 / 8″ | |
| A | 125 | 160 | 200 | 250 | 320 | |||||||
| L | PN16 | 150 | 160 | 180 | 200 | 230 | 290 | 310 | 350 | 400 | 480 | 600 |
| H | 80 | 80 | 80 | 75 | 95 | 105 | 105 | 105 | 150 | 195 | 250 | |
| H1 | 220 | 220 | 235 | 235 | 240 | 250 | 260 | 265 | 350 | 400 | 500 | |
| H2 | 120 | 120 | 120 | 155 | 155 | 200 | 200 | 200 | 230 | 230 | 230 | |
Note: 1.The dimensions in the table are standard data without accessories. The dimensions of accessories are calculated according to the actual configuration. 2. Due to the technical innovation and improvement of the product, the size may change. Please contact the technical department of the Company for the latest information.
The Pneumatic Piston Cutoff Valve is ideal for use in industries such as oil and gas, chemical processing, power generation, and water treatment. It is designed for precise control and reliable shut-off in high-pressure and high-temperature systems. The valve is particularly suitable for processes requiring quick response, durability, and high sealing performance. Its balanced design reduces operational wear, ensuring long-term efficiency in handling liquids, gases, and steam. With flexible actuation options, it is a critical component in automated and remote-controlled systems for ensuring safety and operational efficiency.
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