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Fakai Valve Factory Site: Yongxing Industrial Zone, Longwan District, Wenzhou City Tel: 0577-88767789
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HDH47X Butterfly Buffer Check Valve

HDH47X butterfly buffer check valve structure diagram
HDH47X butterfly buffer check valve structure diagram

Scope of application

H47X, H47H, HH47X, HH47H, H47XF, HDH47X butterfly buffer check valve is used at the pump outlet of industrial water supply and sewage treatment plants to prevent the medium in the pipe network from flowing backward. Automatically eliminates destructive water hammers, ensuring that pumps and pipelines are not damaged. The valve is mainly composed of valve body, flap cutting and good buffering performance. It is the best product for industrial water and urban sewage.

Performance parameter

model Nominal pressure
PN (MPa)
Test pressure PS (MPa) Working pressure (MPa) Operating temperature Applicable medium
case seal
H47X / H
HH47X / H
H47XF
HDH47X
1.0 1.5 1.1 1.0 0 ~ 80 ℃ Water, oil,
Sea water, sewage
1.6 2.4 1.75 1.6
2.5 3.75 2.75 2.5

Implementation standards

Nominal pressure 1.0 ~ 2.5MPa
Nominal diameter 40 ~ 1400ram
Applicable medium Water, oil, sea water, sewage
proper temperature ~ 80 ℃ (up to 200 ℃ if required)
Flange standard GB / T 17241.6 GB / T 9113
Test Standard GB / T 13927 API598

Part material

Part Name Valve body Plate Sealing ring Valve stem filler
material Gray cast iron, carbon steel Gray cast iron, cast steel, ductile iron Nitrile oil resistant rubber, neoprene rubber stainless steel Teflon

Installation diagram

HDH47X butterfly buffer check valve installation diagram

Dimension table

Nominal pressure
PN (MPa)
Size (mm) Nominal pressure
PN (MPa)
Size (mm)
L H B1 B2 L H B1 B2
200 230 550 540 600 600 390 1070 1090 1250
250 250 630 600 700 700 430 1220 1200 1360
300 270 690 650 740 800 470 1320 1320 1480
350 290 780 710 800 900 510 1430 1420 1580
400 310 860 770 870 1000 550 1550 1550 1700
450 330 910 830 920 1200 630 1800 1780 1950
500 350 980 900 1000 1400 710 1980 2000 2175

Flange connection size: PN10, 16, 25 according to JB / T78-94