Pressure Relef & Sustaining Valve

Products Details

What is the Pressure Relef& Sustaining Valve ？

Pressure relief and sustaining valve is a diaphragm type hydraulic control valvewhich uses the hydraulic pressure of the pipeline as the driving source.The mainfeature of the valve is that it can be used as both a pressure relief valve and apressure sustaining valve.
As a safety pressure relief valve,it is used to release the high pressure in front ofthe valve that exceeds the set pressure of the valve out of the system pipeline,soas to prevent the high pressure or sudden pressure in the pipeline from damagingthe pipeline and equipment in front of the valve;as a pressure sustaining valve,thewater supply pressure upstream of the main valve can be maintained above acertain set value,so as to give priority to the water supply in the upstream area ofthe main valve.

Product Drawing

MATERIAL SPECIFICATION
No.	Part	Standard Specification
1	Up Bonnet	EN-GJS-450-10
2	Middle Bonnet	EN-GJS-450-10
3	Valve Body	EN-GJS-450-10
4	Main Gasket	EPDM
5	Disc head	SS304
6	Gland of Main Disc	EN-GJS-450-10
7	Seat	SS304
8	Main Disc	EN-GJS-450-10
9	Spring	SS304
10	Stem	SS304
11	Bushing	C89833
12	Diaphragm	EPDM
13	Bottom Gland	EN-GJS-450-10
14	Up Gland	EN-GJS-450-10
15	Cap Plug	50-300/SS304 350-600/C89833
16	Ball Valve	Hpb59-1
17	Pressure Relief Valve	SS304
18	Pressure Gauge	SS304
19	Needle Valve	SS304
20	Ball Valve	Hpb59-1
21	Built-in Strainer	SS304

 

DN		PN	Dimensions(mm)
Inch	mm		L	H	D	D1	d	C	T	n-ΦL
											2″	50	10/16	203	170	165	125	99	19	3	4-Φ19
2.5″	65	10/16	216	195	185	145	118	19	3	4-Φ19
3″	80	10/16	241	215	200	160	132	19	3	8-Φ19
4″	100	10/16	292	255	220	180	156	19	3	8-Φ19
5″	125	10/16	330	290	250	210	184	19	3	8-Φ19
6″	150	10/16	356	360	285	240	211	19	3	8-Φ23
8″	200	10	495	450	340	295	266	20	3	8-Φ23
		16	495		340	295	266	20	3	12-Φ23
10″	250	10	622	550	405	350	319	22	3	12-Φ23
		16	622		405	355	319	22	3	12-Φ28
12″	300	10	698	645	460	400	370	24.5	4	12-Φ23
		16	698		460	410	370	24.5	4	12-Φ28
14″	350	10	787	700	505	460	429	24.5	4	16-Φ23
		16	787		520	470	429	26.5	4	16-Φ28
16″	400	10	914	790	565	515	480	24.5	4	16-Φ28
		16	914		580	525	480	28	4	16-Φ31
18″	450	10	978	850	615	565	530	25.5	4	20-Φ28
		16	978		640	585	548	30	4	20-Φ31
20″	500	10	978	900	670	620	582	26.5	4	20-Φ28
		16	978		715	650	609	31.5	4	20-Φ34
24″	600	10	1295	1030	780	725	682	30	5	20-Φ31
		16	1295		840	770	720	36	5	20-Φ37

Key Features of Pressure Relef & Sustaining Valve:

1. Dual Function: The primary feature of pressure relief and pressure holding valves is the ability to perform pressure relief and pressure holding functions within a single valve assembly. This allows the valve to relieve excess pressure in the system when needed while maintaining minimum pressure downstream.

2. Pressure Relief: When the pressure in the system exceeds a predetermined set point, the valve’s pressure relief function activates. The valve opens to allow fluid to bypass and relieve excess pressure, preventing damage to downstream equipment or components. This feature helps protect the system from overpressure events such as water hammer or pump failure.

3. Pressure maintaining: In addition to the pressure relief function, this valve also acts as a pressure maintaining valve. This means it maintains minimum pressure downstream even if the upstream pressure drops below a certain level. This helps ensure consistent pressure is delivered to downstream equipment or processes, preventing cavitation or other problems.

4. Adjustable set point: Many pressure release and maintenance valves are equipped with adjustable set points for release and maintenance functions. This allows operators to tailor the operation of the valve to meet specific system requirements or operating conditions. Set points can usually be adjusted manually or remotely using a control system.

FAQ

1. What is the minimum quantity of the order？
Answer: The purchase volume of mixed products is 4 tons

2. How long is the delivery time of the order？
Answer: The delivery time for general orders is about 30 days. If the order is urgent and we have stock, around 7 days.

3. What payment methods do you accept?
Answer: We accept payment terms such as TT, L/C, DP, Western Union, Paypal, etc.

4. Where is your departure port of shipment? Is it possible to deliver to the designated warehouse?
Answer: The port of departure of our goods is generally Tianjin Port or Qingdao Port. We can transport the goods to designated warehouses, such as Yiwu, Guangzhou, etc.

5. What certificates do your products have?
Answer: Our products have FM/UL certificates, and we cooperate with third-party quality inspection certification before the factory, such as SGS,TUV

6.What are the series of your products?
Answer: Our products are divided into heavy series, medium series and light series according to different markets and standards. In order to buy more competitive products for you, please communicate your purchasing needs with the salesperson.

7. Do product packaging cartons and labels support customization?
Answer: Packaging cartons and labels can be customized according to customer requirements.

8.Does the purchased product support customization?
Answer: The product supports customization, but there are purchase quantity requirements and mold costs. For details, please consult the salesperson.

9.What are the packaging methods of the product?
Answer: The packaging of the product includes carton packaging, pallet packaging, wooden box packaging, and woven bag packaging.