TZD series multistage depressurized sleeve regulating valve

Products Mode: TZD
Internal parts characteristics: Sleeve guide, balanced internal structure, fast-disassemble structure
Valve body type: Straightway type, angle type
Bonnet type: Standard type, heat dissipation type, low temperature type
Flow characteristic: Equal percentage, linearity, fast-open
Aperture range: DN40 -500(1.5" ~20")
Pressure level: PN 16/25/40/63/100, ANSI Class 150Lb/300Lb/600Lb
Leakage level: ASME 616.104 IV、V(standard metal valve seat), ASMEB16104VI(cut-off soft valve seat)
Pipeline connection type: Flange, Butt weld
Suitable temperature range: -196 ~ 280℃(high-performance sealing ring); 280 ~ 566℃(flexible graphite sealing ring)
Actuator type: Pneumatic diaphragm actuator, pneumatic piston actuator, electric actuator

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Description

TZD series multistage depressurized sleeve regulating valve applies sleeve guiding, pressure balanced valve spool. It designs a multistage depressurizing internal with several different depressurized cages according to the different specifications. Based on different conditions, the specially designed cage can avoid valve’s flashing and cavitation. Medium is throttled when contacting the first cage, and the high differential pressure is gradually reduced by several throttling, so it ensures that medium’s pressure is always higher than its saturated vapor pressure when it flows inside valve. By this means, the possibility of flashing and cavitation is eliminated, and the life-time of regulating valve in severe condition is prolonged. This type of regulating valve is mainly applied in conditions when it has big differential pressure, and flash and cavitation are easily happened.