In HVAC and water system, ball valves are used as automatic control valves. lt has adjustable fow ratio, high reliability and long service life. lt uses graphite to strengthen the valve body sealing ring and double EPDM valve stem sealing ring. lt has integrated valve distribution butterfy inside and is not afraid of reverse pressure difference. lt has the characteristic of equal percentage fow. Its high turn-off pressure is 1.4MPa. The rated working pressure is PN20. The maximum working pressure difference is 0.35Mpa. lt has a manual actuator short-circuit push button. Working temperature is -5 to 121℃. lt is suitable for central air conditioning, hot and cold water supply system, steam humidifcation, etc.
LFZ-DQ Electrical Regulating Ball Valve
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General
Value
General
Value
Diameter range
DN15-DN150
Rotation angle
0-90°
Connection mode
DNI5-DNS50 (female head conmetion) DN65-DN150 (fanged connetion)
Installation position
vertical installation
Medium
Hot and cold water, unsaturated steam, 50% ethanol water, etc.
Flow characteristics
Equal percentage
Medium temperature range
-5℃-120℃
Bearing pressure of vale body
1.6Mpa flang 2.0Mpa screw thread
Adjustable ratio of valve
>100
Material of valve body
Forged brass (thread)nodular cast iron (flange)
Leakage rat
no leakage from the factory
Valve core material
304 stainless steel
Max. allowable pressure difference
0.35Mpa
Valve stem material
304 stainless steel
Max. cut off pressure difference
1.4Mpa
Sealing ring
EPDM
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