Electric four eccentric butterfly valve
閥門型號：D944H，D974HValve models: D944H, D974H
Diameter specification: DN50~DN1200
Structural form: Four eccentric hard seal (clamp type, flange)
Valve body material: cast steel WCB, stainless steel 304, stainless steel 316
Nominal pressure: PN10, PN16, PN25, PN40
Applicable temperature: -40 ℃~450 ℃
Application scope: Gas, water, gas, oil and corrosive media
Product features: Long service life, frictionless opening and closing, wide range of use, can be used for high temperature and high pressure
電動四偏心蝶閥is an innovative valve further upgraded on the basis of the three eccentric butterfly valve, combined with electric actuators to achieve precise control. Its core characteristics and applications are as follows:
1、 Structural principle
Four eccentric design
Axial/radial composite eccentricity: In addition to the traditional three eccentricities (valve stem deviation from the center of the butterfly plate, valve body center, and sealing surface cone angle deviation), a fourth eccentricity (such as a dynamic floating valve shaft structure) is added to achieve self-adjusting sealing contact force when the butterfly plate is closed, reducing friction and wear.
Sealing enhancement: The four eccentric structure upgrades the butterfly plate and valve seat from linear sealing to surface contact sealing, maintaining uniform force under high pressure and achieving a leakage level of VI (ANSI standard).
Electric actuator
Equipped with intelligent adjustable actuators (such as angular displacement electric devices), supporting 4-20mA signal feedback, with a control accuracy of ± 0.5 °.
The protection level reaches IP67/IP68, suitable for harsh working conditions such as flammability and humidity.
2、 Performance advantages
Characteristic description
Sealing reliability: Metal hard seal (stainless steel+alloy overlay) can withstand high temperatures of ≤ 600 ℃ and has a lifespan of>100000 opening and closing cycles.
When the flow resistance control is fully open, the flow resistance coefficient is ≤ 0.1, and the flow regulation range is wide (15 ° -70 ° opening is linearly controllable).
Maintain the cost of valve shaft bushings to prevent particle intrusion and reduce jamming; When the seal fails, the valve seat can be replaced online.
