Spirax Sarco SRV2S Stainless Steel Pressure Reducing Valve
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Description
Spirax Sarco's SRV2S stainless steel direct acting pressure reducing valves are compact and suitable for steam or gas systems (e.g. compressed air). All parts in contact with the medium are 316 stainless steel and there are three set pressure ranges downstream, differentiated by handwheel color markings.
Downstream set pressure range
| color | Downstream control pressure range |
|---|---|
| grizzly | 0.14 - 1.7 bar g |
| greener | 1.40 - 4.0 bar g |
| orange (color) | 3.50 - 8.6 bar g |
Standards and Certificates
- The products are fully compliant with the European Pressure Equipment Directive 97 / 23 / EC and can be CE marked on request.
- Products can be supplied with EN10204 3.1 certificates, all certificates/tests need to be specified when placing an order.
Sizes and pipe connections
- ½", ¾" and 1": Screwed BSP (BS 21) or NPT.
- DN15,DN20 and DN25: Flanges EN 1092 PN25 and ANSI 150.
Pressure/Temperature Limits
| sports event | particulars |
|---|---|
| Valve body design conditions | PN25 |
| PMA Maximum Allowable Pressure | 25 bar g @ 120 °C |
| TMA Maximum Allowable Temperature | 212 °C @ 19 bar g |
| Minimum permissible temperature | -10 °C |
| PMO Maximum Working Pressure under Saturated Steam | 19 bar g |
| TMO Maximum Operating Temperature | 212 °C @ 19 bar g |
| Minimum operating temperature (below this temperature, consult Spirax Sarco) | 0 °C |
| Maximum downstream set pressure | 8.6 bar g |
| PMX Maximum Working Differential Pressure | 19 bar |
| Recommended maximum pressure reduction ratio (at maximum flow) | 10 : 1 |
| Design maximum cold hydraulic test pressure | 38 bar g (test pressure not allowed to exceed 19 bar g with internal components installed) |
material (that sth is made of)
| Item | Part | material (that sth is made of) |
|---|---|---|
| 1 | spring chamber | Aluminum, LM6 Electroless Nickel Finish Surface |
| 2 | Adjustment handwheel | Plastic, Polypropylene |
| 3 | Upper spring plate | Cast iron, DIN 1691 GG 20 non-electrolytically nickel-finished surface |
| 4 | Pressure regulating spring | Silicon chrome spring steel, 2803 685 A55 range 2 non-electrolytic nickel treated surface |
| 5 | Bellows set | Stainless Steel, 316T/316L |
| 6 | Bellows assembly washers | Reinforced flake graphite |
| 7 | Spring chamber bolt (M8 × 25mm) | Stainless steel, BS 61.5 A 270 |
| 8 | valve body | Stainless steel, DIN 1.4404 BS 3100 316 C12 ASTM A351 CF 3M Electrolytic polished surface |
| 9 | vicarious | PTFE filled graphite |
| 10 | top bar | Stainless steel, ASTM A276 316L BS 3100 316 C12 |
| 11 | Seat | Stainless steel, ASTM A351 CF3M DIN 1.4404 |
| 12 | Seat Gasket | Stainless steel, BS 1449 316 S11 |
| 13 | spool | Stainless Steel, 316L |
| 14 | Spool return spring | Stainless steel, BS 2056 316 S42 |
| 15, 16 | filter | Stainless steel, BS 1446 316 SH |
| 17 | Bottom Cover 'O' Ring | PTFE |
| 18 | Spring range color signage | Plastic, Polypropylene |
| 19 | partitions | Stainless steel, BS 1449 316 S13 AISI 316L |
| 20 | a peg | Copper Plated Mild Steel |
| 21 | flangeless | Stainless Steel, ATNS A315 CF3M Electrolytic Polished Surface |
| 22 | spread litter in a cowshed, pigsty etc | Stainless Steel, 316L |
| 23 | Threaded Actuators | Carbon steel, BS 970 230 M07 non-electrolytic nickel treated surface |
Displacement for safety valve sizing
| caliber | Kvs |
|---|---|
| DN15 | 1.5 |
| DN20 | 2.5 |
| DN25 | 3.0 |
Saturated steam and compressed air sizing
Selection can be made through the selection chart, the curve marked with a serial number indicates the upstream pressure, the left vertical line is the downstream pressure, according to the flow and pressure requirements can be determined by the appropriate type of pressure reducing valve.
weights
| caliber | Threaded connection weight (kg) | Flange connection weight(kg) |
|---|---|---|
| ½" BSP/NPT | 1.48 | - |
| DN15 PN25 | - | 3.1 |
| DN15 ANSI 150 | - | 2.4 |
| ¾" BSP/NPT | 1.58 | - |
| DN20 PN25 | - | 3.8 |
| DN20 ANSI 150 | - | 2.8 |
| 1" BSP/NPT | 1.70 | - |
| DN25 PN25 | - | 4.4 |
| DN25 ANSI 150 | - | 3.6 |
Ordering spare parts is to be done according to the description of the available spare parts table, indicating the caliber, type and pressure range of the pressure reducing valve.
Installation Instructions
Install the pressure reducing valve on a horizontal pipe in the direction of flow according to the arrow on the valve body.
Ordering Instructions
Example: 1- BSP SRV2S Pressure Reducing Valve, stainless steel bellows, fitted with orange spring (3.5 - 8.6 bar g), ½".
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