Multistage Minimum Flow Control Valve


EHD multistage cage control valve used a multilevel cage symmetric sleeve control valve.

It complete control medium velocity within the valve, and greatly reduced noise made by high-pressure gas or steam within the valve, stabile multistage pressure reduces effective prevent liquid cavitation, so it’s the stable control valve used in high-pressure medium performance, customers can also select multi-spring diaphragm mechanism or pneumatic actuators

Body TypeDirect casting ball-type valve
Nominal DiameterDN20, 25, 32, 40, 50, 65, 80, 100, 200
Nominal PressurePN 1.6, 2.5, 4.0, 6.4, 10.0, 16、25Mpa CLASS 150, 300, 600, 900、1500Lb
ConnectionFlange: FF, RF, RTJ, welding: SW, BW
Flange Distanceaccording to IEC534
Sealing GasketMetal with graphite gaskets
PackingV type PTFE, flexible graphite, etc.
Bonnet TypeStandard type lengthened (heat dissipation, low temperature, bellows sealing).

Pneumatic, multi-spring actuator.

Electric: 3810L series, PSL series.

Valve Disc typemultistage cage sleeve type.
Flow characteristicsEqual Percentage, Linear.
Disc MaterialStandard material composition and applicable temperature, pressure range, please refer to the appendix.

Customized selection

BodyTypeDirectBonnetModelStandard, lengthened
MaterialWCB, WC9, 304, 316,etc.MaterialWCB, WC9, 304, 316,etc.
DiscCharacteristicLinear, equal percentage, quick openingPackingV type PTFE
Flexible graphite, below the sealing
Material304, 304+STL/PTFE, 316, 316+STL/PTFE
PositionerElectric valve positioner, intelligent digital positioner
AccessoriesSolenoid valve, valve position feedback device, hand-operated mechanism, lock-up valve, air filter pressure relief device, etc.
Material and internal structure

Material And Internal Structures

  • The above is a standard configuration structure, the valve seat is metal to metal, and we can still provide strengthened trim with stellate alloy coating. For specifically applicable temperatures, we have more reasonable bolts, nuts to choose from.
  • PTFE v-shaped ring stem packing is the standard configuration and can also choose flexible graphite.
  • Standard body material is carbon steel and stainless steel, and we can still provide various high corrosive-resistance alloy materials.

Body Material: Carbon Steel

11Packing gasket304304304
12StuffingPTFE/Flexible graphite
14Pressing sleeve304304304
Body Material: Stainless Steel
1 Sest CF8 CF8M CF3M
2 Nut 304 316 316L
3 Stud 304 316 316L
4 Gasket 316+graphite/PTFE
5 Body CF8 CF8M CF3M
6 Seat 304 316 316L
7 Setm 304 316 316L
8 Stud 304 316 316L
9 Nut 304 316 316L
10 Gasket 316+Graphite/PTFE
11 Stuffing gasket 304 316 316L
12 Stuffing PTFE/Flexible graphite
13 Bonnet CF8 CF8M CF3M
14 Pressing sleeve 304 316 316L
15 Gland CF8 CF8M CF3M
16 Stud 304 316 316L
17 Nut 304 316 316L