Pressure Reducing Valves (PRVs) Series

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Hige Sensitivity Steam Reducing Valve

manufacturer: Shanghai Fengqi Industry Development Co., Ltd.
Eml: sales@fengqi.sh.cn

Tel: 86 (21) 3652 8716
Mob: (86) 138 1635 6498

product drawing

Hige sensitivity steam reducing valves
Hige sensitivity steam reducing valves

Structural features and function

This series of pressure relief valve belongs to pilot piston reducing valve. It consist of two parts the main valve and pilot valve. The main valve is mainly constituted by seat, main valve disc, piston and springs. Pilot Valve consists mainly of seat and disc diaphragm, spring, adjust springs. Through adjusting spring pressure regulating outlet pressure, using diaphragm sensing outlet pressure changes,
And through the pilot valve on-and-off driven piston to adjust the size of flowing area at the throttle part, realizing pressure reducing and stabilizing function.
This series of products is based on the ordinary reducing valve on the following improvement, increase the piston area, changed the throttle structure, change the sealing, improved the pilot valve structure and
Adjusting spring form, thus to improve the performance of the product from the following aspects.
1 improve the sense efficiency of the outlet pressure changes,and improve the sensitivity, greatly reduce the stress error due to the change of upstream pressure, flow changes and etc.
2 improve the flow distribution and reduce the noise.
3.Improved seal structure and prolong the life.
This product is mainly used for steam pipe, applicable to the steam pipe with big inlet pressure change and big flow change.

Dimensions & constructral diagram

Hige sensitivity steam reducing valve constructral diagram
Hige sensitivity steam reducing valve constructral diagram

Main technical parameter and performance norm

Nominal Pressure (Mpa) 1.0 1.6
Casing Body Test Pressure(Mpa)* 1.5 2.4
Sealing test pressure (Mpa) 1.0 1.6
Max. Inlet Pressure (Mpa) 1.0 1.6
Outlet Presure Range (Mpa) 0.04-0.6 0.04-1.0
Pressure Property Deviation (Mpa)△Pp2P GB12246-1989
Flow Property Deviation (Mpa)P2G GB12246-1989
Min. Pressure Difference (Mpa) 0.05 0.07
Leakage Quantity GB12245-1989

Material of main parts

name of part material of parts
body, bonnet, bottom cap WCB
valve seat, disc 2Cr13
cylinder sleeve, piston Al-Fe bronze
diaphragm PH15-7Mo
piston ring para-position polyphenyl
pilot seat, pilot valve disc 2Cr13
main valve spring 50CrVA
pilot main spring 50CrVA
adjust spring 60Si2Mn

Flowrate factor (Cv)

DN 15 20 25 32 40 50 65 80
Cv 1 2.5 4 6.5 9 16 25 36

YG43H/Y Series conne ctive dimensions

Nominal Diameter DN Dimensions Connection dimensions
L H H1 PN 1.0MPa PN 1.6MPa
D K n-ф d C D K n-ф d C
15 140 160 65 95 65 414 45 12 95 65 414 45 14
20 140 160 65 105 75 414 55 14 105 75 414 55 14
25 150 168 68 115 85 414 65 14 115 85 414 65 14
32 180 185 75 135 100 418 78 16 135 100 418 78 16
40 180 185 78 145 110 418 85 16 145 110 418 85 16
50 200 193 88 160 125 418 100 16 160 125 418 100 16
65 230 208 98 180 145 418 120 18 180 145 418 120 18
80 260 228 117 195 160 418 135 18 195 160 818 135 20
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