Structural characteristic and purpose
This reducing valve the new type pilot extra-huge membrane pressure reducing valve developed by our company. It is greatly improved on basis of normal pressure 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.
Note: A variable rate conical pressure adjustment spring is fitted providing a down stream pressure range of 0.2-17bar g. |
main technical parameters and indexes of performance
Nominal pressure | PN25 | Maximun design pressure(PMA) | 25bar g @ 120℃ | Maximun design temperature(TMA) | 232℃ @ 21bar g | Minimun design temperature(TMI) | -10℃ | Maximun upstream pressure for saturated steam service(PMO) | 17barg | Maximun operating temperature(TMO) | 232℃ @ 21bar g | Minimun operating temperature(TMIO) | 0℃ | Maximun differential pressure( Δ PMX ) | 17bar | Down stream pressure range | 0.2-1.7bar g | Maximum cold hydraulic test pressure | 38bar g |
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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 |
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connecting dimension
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 | 100 | 350 | 340 | 263 | 380 | 125 | 400 | 359 | 306 | 455 | 150 | 450 | 375 | 330 | 500 |
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