Description
Spirax Sarco SRV461 and SRV463 Stainless Steel Direct Acting Pressure Reducing Valves All media contact parts are uniformly AISI 316L/1.4404, 1.4408 and 1.4462 stainless steel. Applications are for steam, liquids and gases. Typical applications include: clean steam, gases and liquids for centrifuges, freeze dryers, sterilizers, autoclaves, process tanks, humidifiers and kitchen equipment.
Sizes and pipe connections
| SRV461 |
½", ¾", 1", 1¼", 1½" and 2" BSP Threads |
| SRV463 |
DN15, DN20, DN25, DN32, DN40 and DN50 EN 1092 PN40 Flanges |
| *Other connections, please consult Spirax Sarco. |
|
Pressure/Temperature Limits
| Valve body design conditions |
PN40 |
| Maximum design pressure |
38 bar g @ 38 °C |
| Maximum design temperature |
300 °C @ 23.2 bar g |
| Minimum design temperature |
-10 °C |
| Maximum Operating Temperature Vapor |
190 °C @ 10.9 bar g |
| Liquids and gases |
130 °C @ 30 bar g |
| Minimum Operating Temperature Note: Below this temperature, please consult Spirax Sarco. |
-10 °C |
| Maximum differential pressure |
Reference table of permissible decompression ratios |
| Maximum cold hydrostatic test pressure |
60 bar g |
Allowable decompression ratio (max. P1 / P2)
| Setting range (bar g) |
Nominal Diameter |
|
| G½" - 1" DN15 - DN25 |
G1¼" - 2" DN32 - DN50 |
|
| 0.02 - 0.12 |
80:1 |
50:1 |
| 0.10 - 0.50 |
40:1 |
25:1 |
| 0.30 - 1.10 |
30:1 |
18:1 |
| 0.80 - 12.00 |
20:1 |
12:1 |
material (that sth is made of)
| Serial Number Part |
material (that sth is made of) |
Werkstoff No. 1 |
AISI corresponding specifications |
| 1 Valve Body |
stainless steels |
1.4404 |
316L |
| 2 Spring chamber |
stainless steels |
1.4404 |
316L |
| 3 Top cover |
stainless steels |
1.4571 |
316Ti |
| 4 Seats |
stainless steels |
1.4404 |
316L |
| 5 Spools |
stainless steels |
1.4404 |
316L |
| 6 Diaphragms |
EPDM |
|
|
| 7 'O |
EPDM |
|
|
| 8 'O |
EPDM |
|
|
| 9 'O |
EPDM |
|
|
| 10 Piston |
stainless steels |
1.4571 |
316Ti |
| 11 Upper spring support |
stainless steels |
1.4571 |
316Ti |
| 12 Spring |
stainless steels |
1.4310 |
301* |
| 13 Adjustment screws |
stainless steels |
1.4404 |
316L |
| 14 Locking ring |
stainless steels |
AISI 300 Series |
|
| 15 Flange |
stainless steels |
1.4404 |
316L |
| 16 Soft Seal |
FEPM |
|
|
| 17 Spring clamps |
stainless steels |
1.4301 |
304 |
| Not directly equivalent, just the closest AISI specification given. For hydrocarbon applications, FPM soft seal spools and diaphragms are available. |
|
|
|
Weight (approximate) kg
| 1/2"-1" |
13.5 |
7.1 |
6.1 |
3.1 |
3.1 |
| DN15 - DN25 (flange) |
15.3 |
8.9 |
7.9 |
4.9 |
4.9 |
| 11/4-2" |
14.4 |
8.0 |
7.0 |
4.0 |
4.0 |
| DN32 - DN50 (flange) |
18.4 |
12.0 |
11.0 |
8.0 |
8.0 |
Kv value
| caliber |
1/2" |
3/4" |
1" |
11/4" DN32 |
11/2" DN40 |
2" |
| Kv value at 20% deviation |
4.0 |
5.6 |
6.4 |
17.6 |
17.6 |
17.6 |
| Maximum Kv |
5.0 |
7.0 |
8.0 |
22.0 |
22.0 |
22.0 |
| For valve selection to ensure maximum control accuracy (especially for large load changes), use the Kv value at 20% deviation. Use the maximum Kv value for safety valve selection. Leakage ≤ 0.05% Maximum dielectric value. |
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Recommended Fluid Flow Rate
| vapor |
10-40m/s |
15-60 m/s |
| gas (i.e. gaseous substance) |
Up to 2 bar: 2 - 10 m/s; more than 2 barg: 5 - 40 m/s |
|
| fluids |
1-5m/s |
|
Security information, installation and maintenance
A detailed installation and maintenance guide (IM-P186-02) is provided with the product.
Note: When used for steam, the spring chamber is located below the pipe. A downstream pressure sensing tube is also required.
Ordering Instructions
Example:1-BSP Spirax Sarco SRV461 Pressure Reducing Valve, ½", pressure range 0.8-2.5 bar.
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