Bellows pressure reducing valve details

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Bellows pressure reducing valve detailed description The bellows pressure reducing valve is mainly composed of bellows, adjusting spring, valve seat, valve disc and other parts. The direct acting bellows pressure reducing valve uses the bellows to sense the valve pressure to drive the valve disc, changing and Control the opening of the valve to realize the pressure reducing and stabilizing function. Set the outlet pressure by adjusting the adjusting screw.Main technical parameters of bellows pressure reducing valve

Nominal pressure (MPa) 0.6 1.0 1.6
Shell test pressure (MPa) 0.9 1.5 2.4
Sealing test pressure (MPa) 0.6 1.0 1.6
Higher inlet pressure (MPa) 0.6 1.0 1.6
Outlet pressure range (MPa) 0.05-0.4 0.1-0.8 0.1-1.0
Pressure characteristic deviation (MPa) △P2P GB12244-1989
Flow characteristic deviation (MPa) △P2G GB12244-1989
Minimum pressure difference (MPa) 0.1 0.15 0.15
Leakage GB12245-1989
The shell test does not include the bellows, and the bellows assembly must be removed for the shell pressure test.Materials of main parts of bellows pressure reducing valve
Part Name Part material
Valve body, bonnet WCB
Bottom cover WCB
Seat, Disc 2Cr13
Bellows 1Cr18N9Ti
Bellows Upper Pad 2Cr13
Bellows under pad 2Cr13
Horn seat 2Cr13
main valve spring 50CrVA
adjustment spring 60S12Mn

Bellows pressure reducing valve flow coefficient (Cv)

DN 15 20 25 32 40 50 65 80 100
Cv 1 2.5 4 6.5 9 16 25 36 64

☆Y44H/Y bellows pressure reducing valve series connection size (PN0.6-1.6MPa)

Nominal diameter DN Dimensions Connection size
L h H1 PN1.6MPa PN1.6MPa PN1.6MPa
0.6/1.0MPa 1.6MPa D. K n-Φ d C D. K n-Φ d C D. K n-Φ d C
15 140 140 290 90 80 55 4-12 40 12 95 65 4-14 45 12 95 65 4-14 45 14
20 140 140 295 98 90 65 4-12 50 12 105 75 4-14 55 14 105 75 4-14 55 14
25 160 160 295 110 100 75 4-12 60 14 115 85 4-14 65 14 115 85 4-14 65 14
32 1080 180 295 110 120 90 4-14 70 14 135 100 4-18 78 16 135 100 4-18 78 16
40 200 200 325 125 130 100 4-14 80 14 145 110 4-18 85 16 145 110 4-18 85 16
50 230 230 325 125 150 110 4-14 90 14 160 125 4-18 100 16 160 125 4-18 100 16
65 280 325 130 160 130 4-14 110 14 180 145 4-18 120 18 180 145 4-18 120 18
80 310 380 160 185 150 4-18 125 16 195 160 4-18 135 18 195 160 8-18 135 20
100 350 380 170 205 170 4-18 145 16 215 180 8-18 155 20 215 180 8-18 155 20

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