Factory wholesale Closed Spring Loaded Full Bore Type Safety Valve - ZHD Series (Electric or Pneumatic) Minimum Flow Control Valve – Convista

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Factory wholesale Closed Spring Loaded Full Bore Type Safety Valve - ZHD Series (Electric or Pneumatic) Minimum Flow Control Valve – Convista Detail:

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ZHD multistage cage control valve used multilevel cage symmetric sleeve contol valve. It complete control medium velocitywithin valve, and greatly reduced noise made by high pressure gas or steam within valve, stabile multistage pressure reducing reducing effective prevent liquid cavitation, so it’s the stable control valve used in high-pressure medium performance, customers can also select multi-spring disphragm mechanism or pneumatic actuators, etc.

Technical Parameters

Body type: Direct forging type valve

Nominal diameter: NPS1″-8″ (DN20, 25, 32, 40, 50, 65, 80, 100, 200)

Nominal pressure: CLASS 150, 300, 600, 900, 1500Lb, PN1.6, 2.5, 4.0, 6.4, 10.0, 16, 25MPa

End connection type: FF, RF, RTJ, etc, welding: SW, BW

Flange dimension: According to IEC534

Bonnet type: Standard type, lengthened (heat dissipation, low temperature, bellows sealing).

Packing: V type PTFE, flexible graphite gaskets

Sealing gasket: Metal with graphite gaskets

Actuator: Pneumatic, multi-spring actuator.

Electric: 3810L series, PSL series.

Valve disc type: Multistage cage sleeve type.

Flow characteristices: Equal percentage, linear.

Disc material: standard material composition and applicable temperature, pressure range, please refer to appendix.

Material and internal structure

ZHD series (electric or pneumatic) minimum flow control valve 1(1)

Body material: carbon steel

1	Seat	A105	LF2	F22
2	Nut	2H	35	25Cr2Mo1VA
3	Stud	B7	40MnB	25Cr2Mo1VA
4	Gasket	316+graphite/PTFE
5	Body	A105	LF2	F22
6	Seat	304	304	304
7	Steam	304	304	304
8	Stud	B7	40MnB	25Cr2Mo1VA
9	Nut	2H	35	25Cr2Mo1VA
10	Gasket	316+graphite/PTFE
11	Packing gasket	304	304	304
12	Stuffing	PTFE/Flexible graphite
13	Bonnet	A105	LF2	F22
14	Pressing sleeve	304	304	304
15	Gland	A105	LF2	F22
16	Stud	2H	40MnB	25Cr2Mo1VA
17	Nut	B7	35	25Cr2Mo1VA

Body material: stainless steel

1	Seat	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	Steam	304	316	316L
8	Stud	304	316	316L
9	Nut	304	316	316L
10	Gasket	316+graphite/PTFE
11	Packing gasket	304	316	316L
12	Stuffing	PTFE/Flexible graphite
13	Bonnet	CF8	CF8M	CF3M
14	Pressing sleeve	304	316	304
15	Gland	CF8	CF8M	CF3M
16	Stud	304	316	316L
17	Nut	304	316	316L

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