Description
Features:
1. The other name of Butterfly check
valve is wafer type check valve. It is energy-saving
product.
2. It is small in size, light in
weight and of compact structure and easy maintenance. The disc is
dual-type and can close by itself quickly under the action of
spring torque, avoiding back flow and water hammer. It is good at
avoiding back flow, also some other features, such as small
resistance coefficient, zero leakage when water pressure testing,
complete sealing, vertical and horizontal
installation.
3. Long service life, excellent
sealing property and no need of frequent
maintenance.
4. The flow behavior of check valve
s is 3 times of globe valve and *5% of gate valve. It can cut off
and regulate the media in pipeline and it is multi-function
compared to gate valve and globe valve. The various selection of
trim and seat materials brings wide application of check valve in
chemical industry.
5. Butterfly check valve is small in
size, for example, for *0” check valve, it is 1/9 weight and 1/6
volume of gate valve, so easy installation and system cost saving.
Compared to hard seal gate valve and globe valve, the soft seal
check valve can achieve complete sealing. It is easy to operate the
check valve. The valve can be opened and closed in *0°rotary range.
For the same size, the price of check valve is ****0% of gate valve
and lower installation fee for check valve. Correctly installed
check valve is of some self-cleaning functions, so not easy to lose
efficacy caused by impurity in
pipeline.
Standard:
Design
& Manufacture
Face
to Face
Flange
Connection
Test
& Inspection
MSS
SP**7
API**9
EN**3
API**9
ISO***2 series
*0
BS***5
DIN
PN*0/*6/*5
ANSI B
*6.1
BS***4
ISO
PN*0/*6
JIS B
***2/***3
BS *0
table D
BS *0
table E
API
**8
Performance:
|
size
|
DN*0~DN**0
|
DN*0~DN**0
|
|
PN
|
1.0MPa
|
1.6MPa
|
|
Test
pressure
|
shell
|
1.1MPa
|
1.*6MPa
|
|
sealing
|
1.5MPa
|
2.4MPa
|
|
Applicable
temperature
|
*-EPDM
|
**0℃~***0℃
|
|
*-neoprene
|
*7℃~**3℃
|
|
*-NBR
|
**2℃~**2℃
|
|
*-viton
|
**0℃~***0℃
|
|
Applicable
medium
|
Fresh water, sea water, air, vapor, food,
medicine, oil, acid, alkali, salt, etc.
|
Materials list
