Pressure Reducing Valves (PRVs) Series

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Proportional-Type 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

Proportional-type reducing valves(pic1)
Proportional-type reducing valves(pic1)
Proportional-type reducing valve(pic2)
Proportional-type reducing valve(pic2)
Proportional-type reducing valve(pic3)
Proportional-type reducing valve(pic3)

Structure and function

Y43X - 16, Y13X - 10 proportional-type reducing valve.This valve is mainly constituted by the body, inlet flange, piston, large cylinder sleeve, small cylinder sleeve, outlet flanges and o-shaped rings, sealing gaskets, etc. proportional reducing valve makes use of different sectional area of two float piston ends to constitute the front-back pressure difference, and change the back-pressure to achieve the purpose of pressure-reducing. Proportional reducing valve is of unique structure, superior performance, large flow, switch smooth, without noise, stable ratio of reduced pressure namely: “reducing dynamic pressure” and “reducing static pressure”, and has function:reduce and eliminate the phenomenon of water hammer to water supply pipe, eliminate the instruments of vibration,protection pipe and water conservation.
Standards pressure ratio for 2:1, 3:1,4:1, 5:1, and 3:5:2 etc, designed according to user's requirements of special proportion of valve.

Dimensions & constructral diagram

Proportional-type reducing valve constructral diagram(pic1)
Proportional-type reducing valve constructral diagram(pic1)
Proportional-type reducing valve constructral diagram(pic2)
Proportional-type reducing valve constructral diagram(pic2)
Proportional-type reducing valve constructral diagram(pic3)
Proportional-type reducing valve constructral diagram(pic3)

Y43X main technical parameter of fixed proportion reducing valve

Applicable medium water,gas
Applicable temperature ≤90℃
pressure error ≤8%
min. starting –up pressure 2∶1 0.2MPa
3∶1 0.3MPa
connection type flange, internal thread
material of main parts body tin bronze stainless steel cast iron
internal component tin bronze stainles steel tin bronze or stainless steel

Main external dimensions(Flange-Connection DimensionPN1.0Mpa Abide By GB4216.4-84 Standard,PN1.6Mpa Abide By GB4213.5-84 Standard )

nominal diameter DN(mm) A D3
25 232 115/125
32 246 140/150
40 256 150/155
50 270 165/175
65 306 185/200
80 320 210/230
100 340 240/265
125 400 275/300
150 429 310/350
200 358 355/400
type nominal pressure nominal diameter DN(mm) L
YB43X-10T (Btype) 1.0 50 85
65 102
80 122
100 140
125 160
150 178
200 230
YB43X-16T (Btype) 1.6 50 85
65 102
80 122
100 140
125 160
150 178
200 230
nominal diameter DN(mm) dimensions(mm)
C L D
15 1/2" 80 50
20 3/4" 80 50
25 1" 90 54
32 1 1/4" 100 60
40 1 1/2" 110 68
50 2" 120 80
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Enine Pressure Reduce Valve Contact Enine