N series pneumatic double-seat control valve
The N series new pneumatic diaphragm double-seat control valve adopts a double-guided structure and is equipped with a multi-spring actuator. It has the advantages of compact structure, light weight, sensitive action, large valve capacity, precise flow characteristics and convenient disassembly and assembly. It is widely applied to precisely control media such as gases, liquids and steam, and keep process parameters like pressure, flow rate, temperature and liquid level at the set values. It is particularly suitable for occasions where the pressure difference is large and the allowable leakage is also large, and the medium is not very clean. It is widely applied in the automatic regulation and remote control of industrial production processes such as chemical engineering, petroleum, metallurgy, power stations, light textile, papermaking and pharmaceuticals.
Nominal diameter | DN50~DN400 |
Nominal pressure | PN1.0~PN10.0 Class150~Class600 |
Working temperature range | -196℃~565℃ |
Connection method | Flanged type, welded type |
Valve body material | WCB CF8 CF8M CF3M TA C-276 2205 |
Material of the valve internals | 304 304+STL 316 316+STL 316L 316L+STL 17-4PH C-276 |
Valve cover form | Standard type, heat dissipation type, elongated type, bellows seal type, bellows seal heat dissipation type |
Flow characteristics | Equal percentage, straight line |
Leakage grade | Hard seal Grade IV, Soft seal Grade VI (Standard ANSIB16.104) |
Thin-film actuator | PZM200 PZM280 PZM400 PZM600 PZM1000 PZM1600 |
Spring range and air source | 40-200KPa (0.25MPa for air source) 80-240KPa (0.3MPa for air source) |
Input signal | 4-20mA.DC |
【 Product Features 】
1.The top and bottom double-guided structure is adopted, which enhances the stability of the valves of the entire machine.
2. The unbalanced force it experiences is small; Determined by the characteristics of the valve, the hydrostatic pressure acts simultaneously on the two valve cores, causing them to cancel each other out. Therefore, the unbalanced force it experiences is small, allowing the pressure difference to increase. The thrust required by the actuator was reduced.
3. Large circulation capacity; Compared with other control valves of the same diameter, the double-seat valve can carry more fluid. The flow capacity of the double-seat valve of the same diameter is approximately 20-50% greater than that of the single-seat valve.
