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This series reducing valve is pilot piston type reducing valve, mainly composed of main valve and pilot valve. The main valve consists of valve seat, main valve disc, piston, cylinder sleeve, and spring. The piston valve consists of valve seat, valve flap, membrane, spring and adjusting spring. Set the outlet pressure through adjusting spring, sense the change of pressure of outlet with membrane, adjust the flow area of throttling part of main valve through open and close of pilot valve and drive the piston, to realize the function of reducing and regulating valve. The product is mainly applied on gas piping, such as air, nitrogen, oxygen, hydrogen, liquefied gas, and natural gas.
Field of Application.
Product Name: Pilot Piston type Gas Pressure Reducing Valve.
Pressure Rating: 1.6- 16.0 Mpa.
Nominal Diameter: DN15-500 mm.
Body Material: Steel WCB,CF8.
Standard Flanges: DIN,ANSI,JIS.
| Nominal pressure(Mpa) | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
| Shell test(Mpa) | 2.4 | 3.75 | 6.0 | 9.6 | 15.0 | 24.0 |
| Sealing test(Mpa) | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
| Max.inlet pressure(Mpa) | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
| Range of outlet pressure(Mpa) | 0.1-1.0 | 0.1-1.6 | 0.1-2.5 | 0.5-3.5 | 0.5-3.5 | 0.5-4.5 |
| Min Differential Pressure | 0.15 Mpa | |||||
| Pressure characteristics derivation ΔP2P | GB12246-1989 | |||||
| Flow characteristics derivation ΔP2G | GB12246-1989 | |||||
| Allowable Min Differential Pressure(Mpa) | 0.15 | 0.15 | 0.2 | 0.4 | 0.8 | 1.0 |
| Leakage | Soft seal:0;hard seal:GB12245-1989 | |||||
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 |
Main Technical Parameters and Indexes of Performance.
| Nominal Pressure | 1.6 Mpa | 2.5 Mpa | 4.0 Mpa | 6.4 Mpa | 10.0 Mpa | 16.0 Mpa |
| Tested pressure of shell | 2.4Mpa | 3.75Mpa | 6.0Mpa | 9.6Mpa | 15.0Mpa | 24.0Mpa |
| Sealing test pressure | 1.6Mpa | 2.5Mpa | 4.0Mpa | 6.4Mpa | 10.0Mpa | 16.0Mpa |
| Maximum upstream pressure | 1.6Mpa | 2.5Mpa | 4.0Mpa | 6.4Mpa | 10.0Mpa | 16.0Mpa |
| Pressure range of outlet | 0.1-1.0Mpa | 0.1-1.6Mpa | 0.1-2.5Mpa | 0.5-3.5Mpa | 0.5-3.5Mpa | 0.5-4.5Mpa |
| Minimum differential pressure | 0.15Mpa | 0.15Mpa | 0.2Mpa | 0.4Mpa | 0.8Mpa | 1.0Mpa |
| Medium | Gas, air, oxygen, nitrogen, etc. | |||||
| Operating temperature | 80 | |||||
*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 | WCB/FCB* |
| Valve seat, valve disc | 2Cr13/304* |
| Cylinder sleeve | 25 (hard chrome plating)/304* |
| Piston | 2Cr13 /copper alloy* |
| Piston ring | Alloy cast iron/ polyphenyl* |
| Pilot valve seat, pilot valve rod | 2Cr13/304* |
| Membrane | 1Cr19Ni9Ti |
| Spring of main valve and pilot valve | 50CrVA |
| Adjusting valve | 60Si2Mn |
| Sealing gasket (X/F model) | Rubber/PTFE |
| Pilot valve body, pilot valve cover | 25/304* |
Main External Dimensions.
 |
| DN | External Dimension | DN | External Dimension | ||||||
| L | H | H1 | L | H | H1 | ||||
| 1.6/2.5Mpa | 4.0 Mpa | 6.4 Mpa | 10.0/16.0 Mpa | ||||||
| 15 | 160 | 180 | 290 | 90 | 15 | 180 | 180 | 300 | 100 |
| 20 | 160 | 180 | 300 | 98 | 20 | 180 | 200 | 310 | 105 |
| 25 | 180 | 200 | 300 | 110 | 25 | 200 | 220 | 310 | 120 |
| 32 | 200 | 220 | 300 | 110 | 32 | 220 | 230 | 310 | 120 |
| 40 | 220 | 240 | 320 | 125 | 40 | 240 | 240 | 335 | 135 |
| 50 | 250 | 270 | 320 | 125 | 50 | 270 | 300 | 335 | 135 |
| 65 | 280 | 300 | 325 | 130 | 65 | 300 | 340 | 340 | 140 |
| 80 | 310 | 330 | 365 | 160 | 80 | 330 | 360 | 380 | 170 |
| 100 | 350 | 380 | 365 | 170 | 100 | 380 | 380 | 185 | |
| 125 | 400 | 450 | 475 | 200 | 125 | 450 | 490 | 215 | |
| 150 | 450 | 500 | 475 | 210 | 150 | 500 | 490 | 225 | |
| 200 | 500 | 550 | 515 | 240 | 200 | 550 | 535 | 260 | |
| 250 | 650 | 560 | 290 | 250 | 650 | 580 | 310 | ||
| 300 | 800 | 705 | 335 | 300 | 800 | 725 | 355 | ||
| 350 | 850 | 745 | 375 | 350 | 850 | 765 | 395 | ||
| 400 | 900 | 780 | 405 | 400 | 900 | 800 | 435 | ||
| 450 | 900 | 730 | 455 | 450 | |||||
| 500 | 950 | 835 | 465 | 500 | 950 | 855 | 495 | ||