Pressure Reducing Valve

A pressure reducing valve, often abbreviated as PRV or PRV valve, is a crucial component in fluid control systems designed to maintain a specified and consistent lower pressure on the downstream side of the valve, regardless of variations in the upstream pressure. This valve is especially useful in situations where high-pressure fluid needs to be reduced to a manageable or safe level. The core components of a pressure reducing valve include a valve body, an adjustable spring-loaded diaphragm, and an outlet pressure adjustment mechanism.

Main parts and materials

No
Part
Material
1
Body
Cast iron/Ductile iron
2
Bolts
Stainless steel
3
Cover
Cast iron/Ductile iron
4
Spring
Stainless steel
5
Stem
Stainless steel
6
Nut
Stainless steel
7
Plate
Q235
8
Diaphragm
EPDM
9
Seat
Brass
10
Plate
Q235
11
Gasket
NBR
12
diaphragm discs
Cast iron/Ductile iron
13
Need valve
Brass
14
Ball valve
Brass
15
Pilot valve
Brass
16
Pressure gage
Brass

Outline and Connecting Measurement



DN(mm)


L
D(mm)
D1(mm)
D2(mm
n-d
PN10
PN16
PN10
PN16
PN10
PN16
PN10
PN16
50
215
165
125
99
4-o19
65
235
185
145
119
4-o19
80
250
200
160
133
8-o19
100
290
220
180
154
8-o19
125
325
250
210
184
8-o19
150
360
285
240
210
8-o23
200
420
340
295
265
8-o23
12-o23
250
450
405
350
355
319
12-o23
12-o28
300
510
450
400
410
370
12-o23
12-o23
350
645
520
460
470
429
16-o23
16-o28
400
720
580
515
525
480
16-o28
16-o31
450
785
640
565
585
548
20-o28
20-o31
500
785
715
620
650
609
20-o28
20-o34
600
910
840
725
770
780
20-o31
20-o37

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