Pneumatic Lining Valves

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Pneumatic Lining Valves

Product Model: ZMAPF46
Body Material: WCB, 304,316,316L
Connection: Flange, Threaded, Welded
Seat Forms: single-seat, double seat sleeve
Valve Cover Forms: Standard, Low Temperature, Heat Dissipation, Ripple The tube was sealed type
Pneumatic Actuator: multi-spring diaphragm actuator
Pneumatic Accessories: electropneumatic positioner, air filter regulator, Handwheel-up valve
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[Basic Information]       
Principle of operation: Lining valve by the lining of the valve body components and straight stroke pneumatic multi-spring film actuator. Pneumatic actuators have positive and negative forms of action, when the air pressure increases, the putter protruding into the film chamber is called the role of the valve body with the composition of the gas-type; when the gas pressure increases, put into the film chamber Of the reaction, and the valve body with the composition of air open type. How to Operate the Valve-Positioner: When the signal pressure is applied to the membrane chamber, a thrust is generated on the diaphragm, compressing the spring, moving the plunger, driving the valve stem, changing the flow area between the spool and the valve seat until The reaction of the spring and the signal pressure on the diaphragm of the thrust balance, so as to achieve the purpose of automatic adjustment of process parameters. 

[Technical Parameters]

Nominal diameter (DN)20253240506580100150
Seat Diameter (dn)20253240506580100150
Rated Flow Coefficient (KV)5.081220325070100240
Allowable Differential Pressure (MPa)3.83.23.02.01.81.51.41.00.6
Nominal Pressure (MPa)1.6, 2.5, 4.0, 6.4
Rated Travel (mm)16254060
Equipped With Actuator ModelZHA / B-22ZHA / B-23ZHA / B-34ZHA / B45
Spool FormSingle Seat Plunger Sprinkler Spool
Flow CharacteristicsQuick opening feature


[Valve Features]

, Good corrosion resistance: the valve body cavity, spool, seat, are covered with 3mm thick poly perfluoro-ethylene propylene, strong resistance to strong corrosive fluid.

, Good sealing performance: the use of polytetrafluoroethylene bellows and packing double seal.

, Leakage is small. As the spool, the valve seat with a soft seal to ensure that no leakage.

, High precision adjustment: the use of small pneumatic actuators and electric actuators, small size, light weight.


[Adaptation Conditions]
Pneumatic lining fluorine control valve, with the fluid contact with the valve body wall and valve components are used high-pressure injection molding process, lined with corrosion-resistant, anti-aging polyfluoroethylene propylene (F46), but also the use of PTFE Ethylene bellows seal. Widely used in acid, alkali and other corrosive media and toxic, volatile and other gases, liquid control.