A silent check valve is a valve that automatically opens and closes its disc through the flow of the medium itself, designed to prevent backflow. Also known as a check valve, one-way valve, or backflow valve, its primary functions include preventing medium backflow, avoiding reverse rotation of pumps and drive motors, and controlling medium discharge from containers. It can be classified into swing-type check valves (rotating around their center of gravity) and lift-type check valves (moving along their axis).
Product Features
Streamlined design results in minimal pressure loss;
The valve flap's opening/closing stroke is very short, as is the pump shutdown stroke.
Close the pump quickly when shutting it down to prevent loud water hammer sounds and achieve a silent operation.
Technical Parameter
Model: HC42X
Design and Manufacturing Standard: CJ/T 255-2007
Shell test pressure: 2.4 MPa
Connection type: Flange connection
Applicable medium: water
Nominal pressure: 1.6 MPa
Media temperature: 0–80°C
Connection standard: GB/T 9113
Structure Size
Nominal diameter
Main connection dimensions and external dimensions (mm)
minimum wall thickness
mm
DN
L
PN16
D
D1
D2
C
f
n-@d
50
120
165
125
102
18
3
4-②18
5
65
150
185
145
122
18
3
8-18
5
80
180
200
160
138
20
3
8-②18
6
100
240
220
180
158
20
3
8-Ø18
6.5
Material List
order number
part
standard layout
1
valve body
CF8
2
hex nut
A2-70
3
spring cushion
A2
4
platen
304
5
Coated board
304+NBR
6
Spring
304
7
valve stem
304
8
baffle
CF8
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