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This reducing valve is the new type pilot extra-huge membrane reducing valve developed by our company. It is greatly improved on basis of normal reducing valve. The membrane use new material, enlarging the working area, so the slight change of upper pressure or lower pressure can be fed back to membrane of main valve, and adjust the opening of main valve to ensure the constant pressure of lower stream pressure.
Field of Application.
Product Name: DP143-GVPR04 Pilot Operated Steam Pressure Reducing Valve
Pressure Rating: 1.6- 4.0 Mpa.
Nominal Diameter: DN15-200 mm.
Body Material: Steel WCB.
Standard Flanges:DIN,ANSI,JIS.
Main Technical Parameters and Indexes of Performance.
| Nominal Pressure | PN40 |
| Maximum Design Pressure(PMA) | 26 bar g |
| Maximum Design Temperature(TMA) | 300 @ 26bar g |
| Minimum Design Temperature(TMI) | 0 |
| Maximum Upstream Pressure for SaturatedSteam Service(PMO) | 26 bar g |
| Maximum Operating Temperature(TMO) | 300 @ 26bar g |
| Minimum Operating Temperature(TMIO) | 0 |
| Maximum Differential Pressure( PMX ) | 26 bar |
| Down Stream Pressure Range | 0.2-1.7 bar g, 16.0-24.0 bar g |
| Maximum Cold Hydraulic Test Pressure | 60 bar g |
Material of Main Component.
| Name of Component | Material of Component |
| Valve Body, Valve Cover | WCB |
| Valve Seat | 2Cr13 |
| valve Flap | 2Cr13 |
| Valve Rod | 2Cr13 |
| Membrane | Brass |
| Adjusting Spring | 60Si2Mn |
Main External Dimensions.
 |
| DN | L | H1 | H | D |
| 15 | 147 | 221 | 133 | 185 |
| 20 | 154 | 224 | 136 | 185 |
| 25 | 160 | 235 | 145 | 207 |
| 32 | 180 | 236 | 156 | 207 |
| 40 | 200 | 238 | 176 | 255 |
| 50 | 230 | 246 | 183 | 255 |
| 65 | 250 | 295 | 200 | 320 |
| 80 | 310 | 323 | 230 | 350 |