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Pressure Rating: 1.0- 6.4Mpa
Specification: DN20-400
Material: Steel, CF8
Standard flanges: DIN, ANSI, JIS;
Structural Characteristic&Purpose.
This series pressure reducing valve is a new type regulating valve which adopts piston to replace the diaphragm. The performance is reliable and it's can be used for a long time. The down pressure can be adjusted according to the requirement, and it can be set at a fixed pressure in the application, which won't be changed as the fluctuation of the up pressure and the flowing rate.
Main Technical Parameters&Indexes Of Performance.
| Nominal pressure | PN1.6Mpa | PN2.5Mpa | PN4.0Mpa | PN6.4Mpa |
| Tested pressure of shell | 2.4Mpa | 3.75Mpa | 6.0Mpa | 9.6Mpa |
| Sealing test pressure | 1.6Mpa | 2.5Mpa | 4.0Mpa | 6.4Mpa |
| Maximum upstream pressure | 1.6Mpa | 2.5Mpa | 4.0Mpa | 6.4Mpa |
| Pressure range of outlet | 0.2-1.0Mpa | 0.2-1.6Mpa | 0.2-2.5Mpa | 0.5-3.5Mpa |
| Minimum differential pressure | 0.2Mpa | 0.2Mpa | 0.2Mpa | 0.4Mpa |
| Medium | Steam, water, etc. | |||
| Operating temperature | 425 | |||
*the shell test does not include membrane and top cover.
Material Of Main Component.
| Name of component | Material of component |
| Valve body, valve cover, seat cover | Cast iron, Cast steel |
| Valve seat, | 2Cr13 |
| Valve flap | 2Cr13 |
| Valve rod | 2Cr13 |
| Cylinder sleeve | 2Cr13 /25(hard chrome plating) |
| Piston | 2Cr13 |
| O-shaped ring | Ding nitrile rubber |
| Sealing encircles | Ding nitrile rubber |
| Adjusting valve | 60Si2Mn |
Connecting Dimension.
| DN | external dimension | ||||||||||
| L | H | H1 | |||||||||
| PN1.6, 2.5 | PN4.0 | PN6.4 | PN1.6 | PN2.5 | PN4.0 | PN6.4 | PN1.6 | PN2.5 | PN4.0 | PN6.4 | |
| 20 | 160 | 160 | 170 | 220 | 220 | 220 | 220 | 90 | 90 | 90 | 90 |
| 25 | 180 | 200 | 200 | 255 | 255 | 265 | 265 | 95 | 95 | 100 | 105 |
| 32 | 200 | 220 | 220 | 255 | 255 | 265 | 265 | 100 | 100 | 100 | 110 |
| 40 | 220 | 240 | 240 | 325 | 325 | 330 | 330 | 115 | 115 | 130 | 130 |
| 50 | 250 | 270 | 270 | 325 | 325 | 330 | 330 | 120 | 120 | 135 | 135 |
| 65 | 260 | 280 | 300 | 330 | 330 | 340 | 355 | 125 | 125 | 140 | 145 |
| 80 | 310 | 330 | 330 | 340 | 340 | 340 | 340 | 135 | 135 | 150 | 160 |
| 100 | 350 | 380 | 380 | 347 | 347 | 360 | 360 | 148 | 148 | 185 | 185 |
| 125 | 400 | 450 | 450 | 560 | 560 | 565 | 565 | 190 | 200 | 200 | 245 |
| 150 | 450 | 500 | 500 | 580 | 580 | 585 | 585 | 205 | 210 | 240 | 280 |
| 200 | 500 | 560 | 560 | 630 | 630 | 635 | 635 | 220 | 245 | 245 | 310 |
| 250 | 600 | 750 | 270 | ||||||||
| 300 | 800 | 780 | 310 | ||||||||
| 350 | 850 | 850 | 390 | ||||||||
| 400 | 900 | 925 | 420 | ||||||||