Pilot Operated Pressure Reducing Valve (GADP17E)

Model NO.
Working Temperature
Below 190 Deg C
Pressure Reducing
Steam System, Air Compressor System., etc
Transport Package
Carton, Plywood Case
ISO 9001
HS Code
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Yongjia Goole Valve Co., Ltd. Diamond / Audited Supplier


 Pilot Operated Pressure Reducing Valve

Brief Introduction.
DPP17E Pressure Reducing Valve is supplied as for the DP17 with a control spring but the maximum pressure is limited to 10 Bar g due to the addition of the solenoid valve. A solenoid operated valve is fitted in te pipe between the pilot valve and the main diaphragm camber and is thus in series with the normal pilot valve.
The purpose of the solenoid valve is to override the pilot valve thus causing the main valve to shut-off. It can be controlled by any device capable of interrupting the supply of current to the solenoid coil.
The solenoid is arranged to open the valve when the coil is energised so that whatever switching device is used it must be arranged to break the current to close the main valve. In this way the unit will always fail-safe i.e. will close the main valve in the event of a failure in electrical supply.
Electrical supply
It is important that the solenoid is connected to the correct voltage. Therefore always check on the supply details which are stamped on the solenoid valve name-plate before attempting to connect up. Electrical connection is by cable plug to DIN 43650. All wiring, connectors, etc. in close proximity to the valve should be of heat resisting type and comply with local and national electrical codes.

This pilot operated reducing valve is the new type pilot extra-huge membrane pressure reducing valve developed by our company. It is greatly improved on basis of normal pressure reducing valve. The membrane use new material, enlarging the working area, so the slight change of upper pressure or lower pressure can be fed back to membrane of main valve, and adjust the opening of main valve to ensure the constant pressure of lower stream pressure.

Another outstanding advantage of the valve is: a valve body can be installed with many pilot valves, to realize the temperature control,
upper stream pressure control and long-distance switch control as well as pressure regulating.
Field of Application.
Product Name: DPP17E Pilot Operated Pressure Reducing Valve.
Pressure Rating: 1.6- 2.5 Mpa.
Nominal Diameter: DN15-50 mm.
Body Material: Steel WCB.
Standard Flanges: DIN, ANSI, JIS.
Main Technical Parameters and Indexes of Performance.

Nominal Pressure PN25
Maximum Design Pressure(PMA) 25bar g @ 120
Maximum Design Temperature(TMA) 232 @ 21 bar g
Minimum Design Temperature(TMI) -10
Maximum Upstream Pressure for Saturated Steam Service(PMO) 10 bar g
Maximum Operating Temperature(TMO) 190 @ 21 bar g
Minimum Operating Temperature(TMIO) 0
Maximum Differential Pressure(PMX) 10 bar
Maximum Cold Hydraulic Test Pressure 38 bar g

Material of Main Component.

Name of component Material of component
Valve body, valve cover WCB
Valve seat 2Cr13
valve flap 2Cr13
Valve rod 2Cr13
Membrane Brass
Adjusting spring 60Si2Mn

Main External Dimensions.



15 147 221 133 185
20 154 224 136 185
25 160 235 145 207
32 180 236 156 207
40 200 238 176 255
50 230 246 183 255
65 250 295 200 320
80 310 323 230 350
100 350 340 263 380
125 400 359 306 455
150 450 375 330 500