pilot piston type gas pressure reducing valve
technical parameter
product model: yk43x/f/y
nominal diameter: dn15~500mm
nominal pressure: pn1.6～6.4mpa
applicable temperature: 0~80℃
applicable medium: hydrogen, liquefied gas, natural gas, etc.
product overview
this series of pilot piston type gas pressure reducing valve belongs to pilot piston type pressure reducing valve. it consists of main valve and pilot valve. the main valve is mainly composed of valve seat, main valve disc, piston, spring and other parts. the pilot valve is mainly composed of valve seat, valve disc, diaphragm, spring, adjusting spring and other parts. set the outlet pressure by adjusting the spring pressure, use the diaphragm to sense the change of the outlet pressure, and adjust the flow area of the throttling part of the main valve through the opening and closing of the pilot valve to realize the function of decompression and voltage regulation. this pilot-operated large-diaphragm high-sensitivity pressure reducing valve is mainly used for gas pipelines, such as air, nitrogen, oxygen, hydrogen, liquefied gas, natural gas and other gases.
main technical parameters and performance
| 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 |
| sealing test pressure (mpa) | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
| maximum 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 | |||||
| minimum differential pressure (mpa) | 0.15 | 0.15 | 0.2 | 0.4 | 0.8 | 1.0 |
| leakage | x/f (polytetrafluoroethylene/rubber): o y (hard seal): gb12245-1989 | |||||
*: shell test does not include diaphragm, top cover.
main external dimensions
nominal diameter dn | dimensions | |||
l | h | h1 | ||
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 | |
main external dimensions pn6.4~16.0mpa
nominal diameter dn | dimensions | |||
l | h | h1 | ||
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 | |