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Y42X-GVPR12 Direct Action Piston Pressure Reducing Valve
Brief Introduction.
This series pressure reducing valve is a new type regulating valve which adopts piston to replac 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.
Field of Application.
Product Name: Y42X-GVPR12 Direct Action Piston Pressure Reducing Valve.
Pressure Rating: 1.0- 6.4MpaNominal Diameter: DN20-400
Body Material: Steel, CF8
Standard flanges: DIN, ANSI, JIS.
Main Technical Parameters and 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.
Flow Characteristics.
| DN | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 500 |
| Cv | 1 | 2.5 | 4 | 6.5 | 9 | 16 | 25 | 36 | 64 | 100 | 140 | 250 | 400 | 570 | 780 | 1020 | 1500 |
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 |
Main External Dimensions.
 |
| DN | External Dimension | |||||||||||||
| L | H | H1 | ||||||||||||
| 1.6/2.5 Mpa | 4.0 Mpa | 6.4 Mpa | 1.6 Mpa | 2.5 Mpa | 4.0 Mpa | 6.4 Mpa | 1.6 Mpa | 2.5 Mpa | 4.0 Mpa | 6.4 Mpa | ||||
| 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 | |||||||||||