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Hushan Valve Manufacturing (Shanghai) Co., Ltd
ZHD electric multi-stage regulating valve
NegotiableUpdate on 06/08
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Overview
ZHD electric multi-stage regulating valve
Product Details
| Product Name： | Electric multi-stage regulating valve | Product model： | ZHD |
| Drive mode： | Electric | Connection form： | flange |
| structural style： | multistage | Sealing material： | Metal clip graphite sealing gasket |
| Pressure Range： | 16.0～42.0MPa | Nominal Diameter： | DN20-DN200 |
| Common materials： | Carbon steel, stainless steel | technical advice： |
1、 Introduction to ZHD Electric Multi stage Regulating Valve
ZHD typeElectric multi-stage regulating valveThe multi-stage cage sleeve valve core or axial labyrinth valve core is used, with multi-stage pressure reduction to fully control the flow rate of the medium flowing through the valve, greatly reducing the noise generated by high-pressure gas or steam inside the valve. The stable multi-stage pressure reduction effectively prevents liquid from cavitation, making it a stable control valve for use in high-pressure medium environments. Multiple spring pneumatic thin film mechanisms can be selectedelectric actuatorWait.
Valve core type: multi-stage throttling valve core
Nominal diameter: DN20~200 NPS 3/4 "~8"
Nominal pressure: PN160~420 CLASS 900LB~2500LB
Connection method: Flange: FF, RF, MF, RTJ
Welding: SW, BW
Valve cover form: standard type (-5 ℃~230 ℃)
Heat sink type (-45 ℃~above 230 ℃)
Low temperature extended type (-196 ℃~-45 ℃)
Packing: V-shaped polytetrafluoroethylene packing, flexible graphite packing, etc
Sealing gasket: metal clip graphite sealing gasket
Execution mechanism: Pneumatic: Multi spring diaphragm actuator, piston actuator
Electric: 3810L series intelligent actuator, PSL series intelligent actuator
Surface coating: Green acrylic polyurethane enamel
2、 ZHD Electric Multi stage Regulating Valve Standard Specification
Valve body type: straight through forged valve bodyValve core type: multi-stage throttling valve core
Nominal diameter: DN20~200 NPS 3/4 "~8"
Nominal pressure: PN160~420 CLASS 900LB~2500LB
Connection method: Flange: FF, RF, MF, RTJ
Welding: SW, BW
Valve cover form: standard type (-5 ℃~230 ℃)
Heat sink type (-45 ℃~above 230 ℃)
Low temperature extended type (-196 ℃~-45 ℃)
Packing: V-shaped polytetrafluoroethylene packing, flexible graphite packing, etc
Sealing gasket: metal clip graphite sealing gasket
Execution mechanism: Pneumatic: Multi spring diaphragm actuator, piston actuator
Electric: 3810L series intelligent actuator, PSL series intelligent actuator
Surface coating: Green acrylic polyurethane enamel
3、 ZHD Electric Multi stage Regulating Valve Model Compilation
| Z | actuator | H | structural style | -Nominal pressure | body material | Nominal Diameter |
| Z series regulating valve |
J: Pneumatic thin film actuator H: Pneumatic piston actuator R: Electric 3810L actuator D: Electric PSL actuator |
H straight stroke |
D: Multi stage sleeve regulating valve |
PN160=160 CL1500LB=1500 LB |
C=A105 |
DN25= DN25 |
| For example: Z-type pneumatic diaphragm multi-stage sleeve regulating valve, pressure PN160, valve body material A105, nominal diameter DN50, model: ZJHD-160 DN50 | ||||||
4、 Design Characteristics and Application Analysis of ZHD Electric Multi stage Regulating Valve
Design Features
Continuous adjustment within the high pressure difference range
Adopting multi-stage throttling medium to gradually reduce pressure, each stage pressure drop is above the vaporization pressure, anti cavitation, and low noise.
The valve core adopts a non-equilibrium structure, with conical sealing and good sealing effect.
The sleeve structure is a porous cage type, arranged strictly according to the required adjustment characteristics, with good adjustment performance.
The valve core is equipped with guidance on both the upper and lower sides to adjust balance, without vibration, and has strong self-cleaning ability.
The sealing surface is welded with hard alloy, and the surface of the valve core (rod) is sprayed with hard alloy material, which is resistant to erosion and has a long service life.
application
The boiler feedwater bypass is used for feedwater regulation during start-up or low load operation.
◆ Water supply recirculation bypass regulation (minimum flow control valve).
High pressure bypass spray cooling, superheater spray cooling.
◆ Medium regulation in other high-pressure environments.
Continuous adjustment within the high pressure difference range
Adopting multi-stage throttling medium to gradually reduce pressure, each stage pressure drop is above the vaporization pressure, anti cavitation, and low noise.
The valve core adopts a non-equilibrium structure, with conical sealing and good sealing effect.
The sleeve structure is a porous cage type, arranged strictly according to the required adjustment characteristics, with good adjustment performance.
The valve core is equipped with guidance on both the upper and lower sides to adjust balance, without vibration, and has strong self-cleaning ability.
The sealing surface is welded with hard alloy, and the surface of the valve core (rod) is sprayed with hard alloy material, which is resistant to erosion and has a long service life.
application
The boiler feedwater bypass is used for feedwater regulation during start-up or low load operation.
◆ Water supply recirculation bypass regulation (minimum flow control valve).
High pressure bypass spray cooling, superheater spray cooling.
◆ Medium regulation in other high-pressure environments.
Design Features
The medium flows axially and gradually reduces pressure through multi-stage throttling discs, resisting cavitation and reducing noise when subjected to large pressure differentials.
The valve core can be designed as both balanced and unbalanced types, with the balanced type having a sealing ring at the balance hole.
The valve seat is a conical sealing surface, which achieves reliable sealing when the valve is closed.
The sealing surface is welded with hard alloy, and the surface of the valve core (rod) is sprayed with hard alloy material, which is resistant to erosion and has a long service life.
application
Drainage of high-pressure inner and outer cylinder ducts, main control valves, etc. of the steam turbine.
◆ Drain water from the intermediate pressure cylinder, intermediate pressure regulating valve, low pressure cylinder, and various extraction systems of the steam turbine.
Boiler superheater spray cooling.
High pressure bypass and high-pressure differential water spray for various temperature reduction systems.
◆ Water supply recirculation, water supply bypass valve, regular sewage system, etc.
◆ Medium regulation in other high-pressure environments.
The medium flows axially and gradually reduces pressure through multi-stage throttling discs, resisting cavitation and reducing noise when subjected to large pressure differentials.
The valve core can be designed as both balanced and unbalanced types, with the balanced type having a sealing ring at the balance hole.
The valve seat is a conical sealing surface, which achieves reliable sealing when the valve is closed.
The sealing surface is welded with hard alloy, and the surface of the valve core (rod) is sprayed with hard alloy material, which is resistant to erosion and has a long service life.
application
Drainage of high-pressure inner and outer cylinder ducts, main control valves, etc. of the steam turbine.
◆ Drain water from the intermediate pressure cylinder, intermediate pressure regulating valve, low pressure cylinder, and various extraction systems of the steam turbine.
Boiler superheater spray cooling.
High pressure bypass and high-pressure differential water spray for various temperature reduction systems.
◆ Water supply recirculation, water supply bypass valve, regular sewage system, etc.
◆ Medium regulation in other high-pressure environments.
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