Product: GAY42X Direct acting piston type pressure reducing valve.
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
