VK4 ... series, adjustable flow ratio, high reliability, high life, the use of graphite reinforced PTFE valve seals, valve stem seals double EPDM. Built-one assignment butterfly, afraid of reverse pressure. Equal percentage flow characteristic. High Off strength 1.4MPa. Rated working pressure PN40. Maximum working pressure 0.35Mpa. With manual actuator shorted button. -5 To 121 ° C operating temperature. Suitable for central air-conditioning, heating system, hot and cold water, steam humidification.
Features and performance:

1, VK4 ... series electric control valve, wide application, full-featured

l DN15 to DN50, BSP pipe thread

l two-way or three, merge or split

l Built-one rectifier dispatch

l equal percentage flow characteristic

l adjustable flow regulator valve than

l poppet and stem are made of stainless steel

l drives with different torque selector

l controlled by a switch, the floating-point control, continuous adjustment or three control modes 
2, VK4 ... series electric control valve design working pressure is high, almost to meet all needs of HVAC system working pressure:

l design working pressure: 4.0Mpa

l off pressure: 1.4MPa

l Maximum working pressure: 0.35Mpa

l Quiet maximum working pressure: 0.25MPa 
3, VK4 ... series electric control valve, adjustable flow ratio is extremely high, under any load conditions can be precisely controlled flow of security

l Built-in integration of high-strength material rectification dispatch, the risk of non-shedding 
4, VK4 ... series control valve, stainless steel ball valve and valve apply to all HVAC applications:

l suitable operating temperature -5 to 121 oC

l is applicable to an aqueous solution of 50% ethylene glycol

l applicable to saturated steam at 100 kPa 
5, VK4 ... series control valve, electric actuator selection easier, several actuators and fittings to meet all application requirements:

NOTE: Actuator wiring corresponding reference VK1 series damper actuator wiring diagram