This series of pressure reducing valve belongs to the pilot piston type pressure reducing valve. By the main valve and pilot valve two parts. Main valve mainly by the valve seat, the main valve plate, piston, spring and other parts of the composition. The pilot valve is mainly composed of valve seat, valve, diaphragm, spring, adjusting spring and so on. By adjusting the spring pressure to set the outlet pressure, the use of the diaphragm sensing outlet pressure change, through the pilot valve opening and closing the main valve throttle position of the flow area of the size, to achieve the function of pressure relief. This product is mainly used in gas pipeline, such as air, nitrogen, oxygen, hydrogen, liquefied gas, natural gas and other gases.
Note: parameters are for reference only, or are not full. Valve can be used in accordance with the requirements of different pressure, material, diameter, drive, etc.. Specific please contact or online advisory contact.
Part name | Part material |
The valve body valve cover Gaidi | WCB/FCB* |
Valve seat disc | 2Cr13/304* |
Cylinder liner | 2Cr13/25(Hard chromium plating)/304* |
piston | 2Cr13/Copper alloy / copper alloy* |
Piston ring | Alloy cast iron / polystyrene* |
Guide valve stem | 2Cr13/304* |
diaphragm | 1Cr18Ni9Ti |
Main valve guide valve spring | 50CrVA |
Regulating spring | 60Si2Mn |
Gasket (X/F model) | Rubber / PTFE |
Guide valve cover | 25/304* |
Nominal pressure(Mpa) | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
Shell test pressure(Mpa)* | 2.4 | 3.75 | 6.0 | 9.6 | 15.0 | 24 |
Seal test pressure(Mpa) | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
inlet pressure(Mpa) | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
Outlet pressure range(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 |
Pressure characteristic deviation(Mpa)△P2P | GB12246-1989 |
Flow characteristic deviation(Mpa)P2G | GB12246-1989 |
difference(Mpa) | 0.15 | 0.15 | 0.2 | 0.4 | 0.8 | 1.0 |
Seepage quantity | X/F(PTFE / rubber):O Y (seal):GB12245-1989 |
(PN1.6-4.0)Company:mm
Nominal diameter DN | Outline dimension |
L | H | Hl |
1.6/2.5MPa | 4.0MPa |
15 | 160 | 180 | 290 | 90 |
20 | 160 | 180 | 300 | 98 |
25 | 180 | 200 | 300 | 110 |
32 | 200 | 220 | 300 | 110 |
40 | 220 | 240 | 320 | 125 |
50 | 250 | 270 | 320 | 125 |
65 | 280 | 300 | 325 | 130 |
80 | 310 | 330 | 365 | 160 |
100 | 350 | 380 | 365 | 170 |
125 | 400 | 450 | 475 | 200 |
150 | 450 | 500 | 475 | 210 |
200 | 500 | 550 | 515 | 240 |
250 | 650 | 560 | 290 |
300 | 800 | 705 | 335 |
350 | 850 | 745 | 375 |
400 | 900 | 780 | 405 |
450 | 900 | 730 | 455 |
500 | 950 | 835 | 465 |
(PN6.4-16.0) Company:mm
Nominal diameter DN | Outline dimension |
L | H | Hl |
6.4MPa | 10.0/16.0MPa |
15 | 180 | 180 | 300 | 100 |
20 | 180 | 200 | 310 | 105 |
25 | 200 | 220 | 31 | 120 |
32 | 220 | 230 | 310 | 120 |
40 | 240 | 240 | 335 | 135 |
50 | 270 | 300 | 335 | 135 |
65 | 300 | 340 | 340 | 140 |
80 | 330 | 360 | 380 | 170 |
100 | 380 | 380 | 185 |
125 | 450 | 490 | 215 |
150 | 500 | 490 | 225 |
200 | 550 | 535 | 260 |
250 | 650 | 580 | 310 |
300 | 800 | 725 | 355 |
350 | 850 | 765 | 395 |
400 | 900 | 800 | 435 |
500 | 950 | - | 855 | 495 |