Electric single-seat control valve is featured by good sealing and small leakage. But for the relatively big axial unbalance force of the valve plug, the work pressure shall not be over high.

Electric dual-seat control valve is featured by big rated flow rate, small axial balance force of valve plug, stable operation and big service pressure difference, etc., and so has been widely used. But its leakage is bigger than that of single-seat valve.

Electric sleeve control valve has better stability and resistance to cavitation than the abovementioned two valves.

 

Relative Parameters

Nominal diameter:  20—300mm

Nominal pressure:  1.6 Mpa,4 Mpa,6.4Mpa

Connection Type:Flange Connection

Valve body material: cast iron,cast steel,cast stainless steel

Connection way:  flange connection according to JB79-59

Operating temperature range:normal type: -20°C—+230°C;

                                              heat dissipation type:-60°C—+450°C

Function form: electric on-off 

Leakage:single-seat valve 0.01%×rated Kv

              double-seat valve 0.5%×rated Kv

              sleeve valve 0.5%×rated Kv

 

Type:ZAZP, ZAZN, ZAZM,BELLAZP,BELLAZN,BELLAZM

 

Application:automatic control, such as building material, metallurgy, chemical engineering and mine.