The structural configuration of pneumatic high-pressure regulating valves features either a high-pressure two-stage cage structure or an axial flow labyrinth structure. Suitable for high differential pressure conditions, the valve plug incorporates nitrided heads or carbide inserts to resist erosion and cavitation under high pressure differentials, thereby extending service life. Due to the high differential pressure, the medium exerts significant unbalanced forces on the valve plug. Consequently, actuators with high rigidity are selected during design, typically paired with valve positioners. The operation of pneumatic high-pressure control valves originates from the thrust generated by the signal pressure on the diaphragm. This thrust drives the push rod to move the valve plug accordingly, thereby adjusting the valve stroke. Changes in stroke alter the valve's flow area, regulating process parameters such as pressure, temperature, flow rate, and liquid level.
| Nominal Diameter(DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seat diameter(dn) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Rated Flow Coefficient(KV) | Single-seat | 6.9 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 630 | 875 | 1250 |
| Cage-type | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 155 | 250 | 370 | 580 | 900 | 1300 | |
| Permissible pressure differential(MPa) | ≤ Nominal Pressure | |||||||||||||
| Nominal Pressure(MPa) | 10.0, 16.0, 25.0, 32.0, 45.0 | |||||||||||||
| Rated stroke(mm) | 16 | 25 | 40 | 60 | 100 | |||||||||
| Valve bonnet type | Standard Type (-17°C to +250°C), High-Temperature Type (+250°C to +450°C) | |||||||||||||
| Capping method | Bolt-clamping type | |||||||||||||
| Sealing Packing | V-shaped PTFE packing, V-shaped flexible graphite packing | |||||||||||||
| Valve Core Type | High-pressure single-seat type, high-pressure cage type, two-stage cage type | |||||||||||||
| Flow Characteristics | Equal percentage | |||||||||||||
Tianjin Yibiao Valves Main Products: