Water Control Safety Relief Pressure/Holding Pressure Valve Water/ Oil / Steam Pressure Reducing Valve/ Pressure Regulating Valve / Control Valve

• Customization: Available
• Temperature: Ordinary Temperature
• Certification: GS, CE, ISO9001
• Standard: Standard
• Connection Mode: Flange
• Power: Hydraulic
• Material: Alloy
• Type: Sleeve
• Size: DN50~DN600
• Transport Package: Wooden Case
• Specification: DN50~DN600
• Trademark: HUIZHENG
• Origin: China
• HS Code: 8481804090
• Production Capacity: 3000

Product Description

01.Description
Surge Anticipating Valve is indispensable for protecting pumps, pumping equipment and all applicable pipelines from dangerous pressure surges caused by rapid changes of flow velocity within a pipeline. When a power failure take place, the abrupt stopping the pump can cause dangerous surges in the system which could result in severe equipment damage. Power failure to a pump will usually result in a down surge in pressure, followed by an up surge in pressure. The surge control valve opens on the initial low pressure wave, diverting the returning high pressure wave from the system. In effect, the valve has anticipated the returning high pressure wave and is open to dissipate the damage causing surge. The valve will then close slowly without generating any shock.
02.Main parts&material

No.	Part	Material	China stardard
1	body	Ductile iron	EN-JS1040
2	Seat ring	Stainless steel	AISI 304
3	O-ring	Rubber	NBR
4	O-ring	Rubber	NBR
5	Screw bolt	Stainless steel	A2
6	Gasket	Stainless steel	A2
7	bonnet	Ductile iron	EN-JS1040
8	Shaft Sleeve	Lead Brass	CZ 122
9	Spring	Stainless steel	AISI 304
10	Nut	Stainless steel	A2
11	Diaphragm	Rubber	NBR
12	Diaphragm pressure plate	Ductile iron	EN-JS1040
13	Hinge Pin	Stainless steel	AISI 304
14	Yoke	Ductile iron	EN-JS1040
15	Seal Ring	Rubber	NBR
16	Guide plate	Stainless steel	AISI 304
17	Stem	Stainless steel	AISI 304
I8	Plug	Stainless steel	AISI 304

03.Features
001.The diaphragm assembly provides long life and reliability with a stem guided by both top and seat rings.
002.All cast iron parts are coated with split epoxy resin to resist corrosion.
003.During maintenance, the main valve does not need to be removed from the pipeline and can be repaired directly on line.
004.The alignment of valve body allows for better control characteristics and lower head loss.
005.Ductile iron body has high strength and light weight.
006.Reinforced nylon diaphragm, film thickness uniform high strength, good precision, durable.
007.Internal use of stainless steel seat, guide platen and shaft, durable.
008.Good closing effect, zero leakage safety.
009.Hydraulic operation does not need external power, can cooperate with the need to match different guide valves and accessories as opening and closing or adjust the water level, pressure and flow.

04.Dimensions

DN	L	B	H	D	PN10	PN16	PN25	N.W. kg
50	230	173	232	85		4-019		14
65	290	197	259	95	4-019	4-019	8-019	19
80	310	224	279	102	8-019	8-019	8-019	23
100	350	265	305	120	8-019	8-019	8-023	32
150	480	352	445	152	8-023	8-023	8-028	68
200	600	436	569	182	8-023	12-023	12-028	112
250	730	518	611	212	12-023	12-028	12-031	178
300	850	600	659	242	12-023	12-028	16-031	225

DN	L	ØD			ØK			H	N-Ød
		PN10	PN16	PN25	PN10	PN16	PN25		PN10	PN16	PN25
400	1100	565	580	620	515	525	550	813	16-028	16-031	16-037
450	1100	615	640	670	565	585	600	813	20-028	20-031	20-037
5CO	1250	670	715	730	620	650	660	967	20-028	20-034	20-037
6CO	1450	780	840	845	725	770	770	1140	20-031	20-037	20-040
700	1450	895	910	960	840	840	875	1140	24-031	24-037	24-043

05.Execution standard

Design standard	CJ/T219, JB/T10674
Connection standard	GB/T17241.6
Face spacing standard	GB/T12221
Inspection testing standard	GB/T13927

06.Technical parameters

Nominal diameter	DN50~DN600(2"~24") PN10 DN50~DN600(2"~24") PN16 DN50~DN200(2"~8") PN25
Nominal pressure	0.1MPa-0.8MPa 0.8MPa-1.3MPa 1.3MPa-2.0MPa
Operating temperature	-10°C~85°C
Seal test	1.1PN
Shell test	1.5PN
Suitable medium	Water

07.Operating principle
Fluctuations when the pipeline pressure in normal circumstances, sampling valve tube after Y type filter to wave the upper valve diaphragm, a buffer holes due to the lower part of the diaphragm valve and valve body are interlinked, diaphragm valve at this time due to the fluctuation of pressure equal to there is no pressure difference and fluctuation valve close on lower part of the diaphragm spring force, when the sudden rise in pressure in pipe, rises high, lower part of high pressure pilot valve diaphragm pressure lifts suddenly, when the pressure rises to more than low pressure pilot valve spring pressure, high pressure pilot valve to open, will wave valve diaphragm upper water leakage, pressure fluctuation after the upper valve diaphragm pressure relief to the diaphragm valve spring force to overcome fluctuations, fluctuation valve open, high pressure pilot valve opens,Pressure water relief into the low-pressure guide valve, the low-pressure guide valve due to the spring force will open the low-pressure guide valve, further drain the pressure fluctuation valve diaphragm on the cavity of the water, so that the pressure fluctuation valve as soon as possible to open.When the water pressure in the pipeline falls, the water in the lower part of the high-pressure guide valve diaphragm is not enough to overcome the spring force on the low-pressure guide valve, the high-pressure guide valve closes, the low-pressure guide valve also closes, at this time the upper part of the fluctuation valve diaphragm is full of water, there is no pressure difference on the lower part of the fluctuation valve diaphragm, the fluctuation valve closes the fluctuation valve by the action of the spring force.Since the lower chamber is connected to the pressure in the valve body through a fixed hole, the closing of the valve is cushioned.

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