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Self-Operated Pressure Controller
Pressure Reducing Valve Type PRV
◘
Description
The PRV is a direct acting Pressure Reducing Valve suitable for
steam or gases such as compressed air.
◘
Limiting Conditions
Body design conditions PN 25
Maximum design temperature 210 °C
Maximum cold hydraulic test 38 bar g
Maximum recommended Ap 10 at maximum flow
Maximum upstream pressure 19 bar g
Maximum&minimum downstream reduced
pressure 0.14 : 8.6 bar g.
◘ Application
When external pressure sensing is use. Remove the blanking plug and fit
and the other end of plug adjusted by spring force and cause to
changed the rate and downstream pressure.
◘
Operating Range
Pressure-Temperature
Diagram
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◘
Dimensions in (mm) & Weights (approximate)
|
DN |
A |
B |
C |
Weight |
|
15 |
85 |
126 |
65 |
1.60 kg |
|
20 |
98 |
126 |
65 |
1.70 kg |
|
25 |
110 |
126 |
65 |
2 kg |
|
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◘
Capacities
For steam and compressed air sizing. Full lift capacities for
safety valve sizing purposes are shown below:
| DN
15 |
DN
20 |
DN
25 |
| Kvs
1.5 |
2.5 |
3.0 |
Downstream pressure ranges available
and shown by color of identity disc (16).
- Gray:
0.14 - 1.7 bar g
- Green:
1.4 4.0 bar g
- Orange: 3.5 - 8.6
bar g
◘ Material
| 1 |
Spring housing |
Aluminum - Epoxy coated LM24 |
 |
| 2 |
Adjustment Hand Wheel |
Plastic - Polypropylene |
| 3 |
Top Spring Nute |
Cast Iron |
| 4 |
Pressure Adjustment Spring |
Silicon Chrome Spring Steel |
| 5 |
Bellows |
Stainless Steel 316 Ti / 316L |
| 6 |
Bellows gasket |
Stainless Steel |
| 7 |
Cover Bolt |
Steel - Gr8.8 |
| 8 |
Body (Screwed) |
SG Iron - GGG 40.3 |
| 9 |
Guide Bush |
Graphite filled PTFE |
| 10 |
Pushrod |
Stainless Steel |
| 11 |
Seat |
Stainless Steel |
| 13 |
Valve |
Stainless Steel / 316 |
| 14 |
Valve Spring |
Stainless Steel / 316 |
| 15 |
Strainer Screen |
Stainless Steel / 316 |
| 16 |
Spring Range |
Polypropylene |
| 17 |
Bulkhead Plate |
Stainless Steel / 316L |
| 18 |
Tamperproof Pin |
Mild Steel - Cooper Plated |
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Note: Items 9, 10, 11,
13, 14 and 15 are an assembly. |
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