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Tunable Pressure-reducing-and-maintaining Valve

product drawing

Tunable pressure-reducing-and-maintaining valves
Tunable pressure-reducing-and-maintaining valves

Structural Features

YX741X tunable pressure-reducing-and-maintaining valve consists of main valve, needle regulating valve, pilot valve, ball valve and taking over system. The body of the main valve adopts all channels, straight-flow type, streamline design, and two kinds of structure as the diaphragm and piston type. This product make use of setting spring pressure of the pressure regulating pilot valve and adjusting needle valve opening to setting ther outlet pressure, and stabilize the outlet pressure by the feedback of the takeover systems and the control chamber.
This product using needle regulating valves and pilot valve to self-reliance control of water-pressure, does not need additional devices and energy, and easy to maintain, small influence by inlet pressure and flow. pressure control accuracy is high, pressure-reducing-and-maintaining is reliable.

Working Principle

When water go in from water pipe, water flowed into the main valve control chamber by needle valve,outlet pressure impact on the pilot valve by catheter, when the outlet pressure is higher than pilot valve setting valve,pilot valve closed, and control chamber stop drainage, then the presure of the control chamber of the main valve rise and close the main valve, so the outlet pressure will no longer rise.
When the pilot valve outlet pressure reduces to the setting value, the valve opens, the control chamber downstream drainage. Because of the displacement of the pilot valve is more than the inflow of the needle valve, the pressure of the main valve control chamber drops, the main valve opens by the inlet pressure. Under stable condition, the control chamber bilging, same displacement and unchanged opening cause the outlet pressure constant.
Adjust the spring of the pilot valve can set the outlet pressure.

Working Features

1, pressure control is stable and reliable. Pilot valve and the main valve work continuously, downstream pressure changes continuously and stably, the inlet pressure effect is small.
2 Convenient operation. After adjustment for working pressure, when the upstream pressure or flow changes, the main valve automatically adjust, stabilize the downstream pressure.
3 The body adopts the whole passage, straight-flow and streamline design. Hydraulic losses is small, energy-saving effect is good.

Dimensions & constructral diagram

Tunable pressure-reducing-and-maintaining valve constructral diagram
Tunable pressure-reducing-and-maintaining valve constructral diagram
1、Pressure gaugege2、Pilot Valve3、Filter4、Flow regulating valve 5、Main Valve

Main technical parameter

nominal pressure(Mpa) test pressure of casing body (MPa) sealing test pressure (MPa) pressure-adjustable range(MPa) applicable medium medium temperature (℃)
1.0 1.5 1.1 0.09-0.8 水water 0-80
1.6 2.4 1.76 0.15-1.4
2.5 3.75 2.75 0.2-2.0

Material of main parts

name of parts material of parts
body and bonnet WCB
valve seat and disk copper alloy /2Cr13
sealing ring O-shaped ring NBR
valve rod 2Cr13
spring 50CrVA
cylinder sleve piston (piston-type) 2Cr13
diaphragm(diaphragm-type) knitting NBR
control valve ball-valve copper alloy
filter stainless steel

Specification and dimensions

DN L H D mm D1 mm b mm D2 mm n-Φd
mm mm PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5 PN1.0 PN1.6 PN2.5
40 240 270 150 150 150 110 110 110 18 18 18 88 88 84 4-17.5 4-17.5 4-18
50 240 270 165 165 165 125 125 125 20 20 20 102 102 99 4-17.5 4-17.5 4-18
65 270 340 185 185 185 145 145 145 20 20 22 122 122 118 4-17.5 4-17.5 8-18
80 300 400 200 200 200 160 160 160 22 22 24 133 133 132 8-17.5 8-17.5 8-18
100 350 440 220 220 235 180 180 190 24 24 24 158 158 156 8-17.5 8-17.5 8-22
125 400 460 250 250 270 210 210 220 26 26 26 184 184 184 8-17.5 8-17.5 8-26
150 480 500 285 285 300 240 240 250 26 26 28 212 212 211 8-22 8-22 8-26
200 500 640 340 340 360 295 295 310 28 30 30 268 268 274 8-22 12-22 12-26
250 605 690 395 405 425 350 355 370 28 32 32 320 320 330 12-22 12-26 12-30
300 700 820 445 460 485 400 410 430 28 32 34 370 370 389 12-22 12-26 16-30
350 800 950 505 520 555 460 470 490 30 36 38 430 430 448 16-22 16-26 16-33
400 900 1400 565 580 620 515 525 550 32 38 40 482 482 503 16-26 16-30 16-36
450 1000 1580 615 640 670 565 585 600 32 40 42 532 550 548 20-26 20-30 20-36
500 1100 1600 670 715 730 620 650 660 34 42 44 585 585 609 20-26 20-33 20-36
600 1300 1815 780 840 845 725 770 770 36 48 46 685 685 720 20-30 20-36 20-39
700 1400 2040 895 910 960 840 840 875 40 54 50 800 800 820 24-30 24-36 24-42
800 1500 2350 1015 1025 1085 950 950 990 44 58 54 905 905 925 24-33 24-39 24-48
900 1700 2606 1115 1125 1185 1050 1050 1090 46 62 58 1005 1005 1028 28-33 28-39 28-48
1000 1900 2765 1230 1255 1320 1160 1170 1210 50 66 62 1110 1110 1140 28-36 28-42 28-56
1200 2050 2950 1455 1485 1530 1380 1390 1420 56 52 70 1330 1328 1350 32-39 32-48 32-55
1400 2200 3180 1675 1685 1755 1590 1590 1640 62 58 76 1530 1530 1560 36-42 36-48 36-60
1600 2400 3400 1915 1930 1955 1820 1820 1860 68 64 84 1750 1750 1780 40-48 40-55 40-60

ANHUI FENGQITunable Pressure-reducing-and-maintaining Valveorder Tips:

SHANGHAI FENGQI CO., LTD. is a professional manufacturer which designs, manufactures Tunable Pressure-reducing-and-maintaining Valve, welcome to consult with our engineer about detail product information by telephone or e-mail. We will give your feedback within one work day.
The contact information as follow:
Tel:021-3652 8691, Fax: 0086 021-52241165-604。
Note:
1. The diagrams, drawing and specification of Tunable Pressure-reducing-and-maintaining Valve, just for reference. The performance parameters, price and detail size of Tunable Pressure-reducing-and-maintaining Valve ,please contact with our engineer or seller to obtain.
2. If valve be used in complex and diverse environments, please kindly provide drawing and detail specification to us as possible. Our expert will help you to choose.

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