Model 41-03 pressure relief, sustaining, back pressure valve can maintain upstream pipe pressure. It is applied for pressure relief, sustaining, and back impact problems.During operation, through pilot to sense the valve inlet pressure and control the open/close of the valve. When the input pressure is over the preset value, valve will quickly open and maintain the pressure in the pipe.After pressure relief, the valve will close slowly to prevent impact happening.
If a check feature is added, and a pressure reversal occurs, the downstream pressure is admitted in the main valve cover chamber closing the valve to prevent return flow.

• Type 41 Pressure Back Valve 10″*150LB SUS304

Schematic Diagram

Accessories

Dimension

 

 

Valve size	50牙口	50	65	80	100	125
L (mm)	184	205	229	250	320	370
H (mm)	123	155	182	186	242	276
Weight (kg)	6	11	13	22	37	46
Valve size	150	200	250	300	350	400
L (mm)	415	500	605	725	733	990
H (mm)	308	418	488	572	598	815
Weight (kg)	75	125	217	370	380	846

 

Notice：

※When installing the valve, strongly request to leave enough space for maintenance. It is necessary to install the filter at the front section of the valve to avoid foreign materials to block the valve and affect the operation of the valve.

 

※King-Tech reserves the right to make any revisions on the valve model and size without prior notification.

 

※When making any design drawing, installation drawing or construction drawing, please do get our approved CAD with our signature, or we will not be responsible for any mistake.

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Specification

 

Size：DN50~DN400 to flange , DN50 to Thread

 

Flange：10K、16K、PN16、150LB

 

Temp. range：0℃~100℃，water

 

※Any size over DN450 can be made to order.

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Material

 

Body：Ductile Iron / Stainless steel

 

Accessory：Brass / Stainless steel

 

Fastener & Spring：Carbon steel / Stainless steel

 

Diaphragm：NBR / EPDM

 

Stem：Stainless Steel

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Pilot Specification

 

Pressure adjustment range：1~4 bar 、3~9 bar、7~16 bar

 

Temp. range：0℃~100℃，water

 

Material：Brass / Stainless steel

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When Ordering, Please Specify

 

1、Valve model number

 

2、Valve size

 

3、Pressure range

 

4、Connection type

 

5、Other optional parts

 

6、Working pressure

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Installation

 

• Pressure Sustaining Valve

 

 

 

 

• Pressure Relief Valve

Typical Application

 

 

●Pressure Relief Valve

To prevent high pressure impact happened at the time pump shut down, the quick open and slow close model 41-03 valve can release the unexpected high pressure to protect system piping and avoid water hammer problem.

 

 

 

 

 

●Sustaining Valve

 

41-03 can be used as sustaining valve by installing it between upstream high pressure water supply and downstream big flow rate demand. It can maintain upstream supply pressure to avoid over flow rate problem which will lead upstream supply pressure loss.