Jacket type soft sealing eccentric hemisphere valve
- name: Jacket type soft sealing eccentric hemisphere valve
- Type: PQ347X/H
- Presure: 1.0～2.5MPa
- Specifications: DN50～DN1400
- material: Gray iron, ductile iron, carbon steel, etc.
- $Column1$
Main parts material
material code
Valve body, valve cover
sphere
stem
sealing ring
filler
actuator
C
WCB carbon steel
WCB
20Cr13
rubber
graphitr
actuator
P
CF8 (304 )stainless steel
CF8
304
rubber
PTFE
R
CF8M (316) stainless steel
CF8M
316
rubber
PTFE
Other special materials, our company can also be tailored to customer needs.
shell material
Applicable medium
Applicable temperature（℃）
carbon steel（C type）
Water, air, oil
≤80
Ci Ni Ti（P type）
Nitric acid
≤80
Ci Ni Mo Ti Steel（R type）
Acetic acid
≤80
nominal pressure PN（MPa）
shell（MPa）
test pressure（MPa）
seal（liquid）（MPa）
seal（gas）（MPa）
1.0
1.5
1.1
1.1
1.6
2.4
1.8
0.6
2.5
3.8
2.8
0.6
- Implementation standards
Design specification: GB/T 26146
Structure length: GB/T 12221, GB/T 26146
Connecting flange: GB/T9113, HG/T20592, HG/T20615, JB/T 79
Experiment and test: GB/T13927, JB/T 9092
Pressure temperature: GB/T 9131
Product identification: GB/T 12220
- 1 before installation to confirm the valve identification (such as models, nominal diameter, nominal pressure, material) is based on the requirements of the pipeline system identification. Check the cleanliness of the valve cavity, to confirm the improvement of the parts can not be installed when the foreign body.
2. Ball valve driving device to break up and electric two can be assembled according to user needs, valve installation before examinations of opening and closing, the two. When the use of a period of time, the valve leakage, can be adjusted manually and electric drive device to limit the fastening bolt, due to eccentric structure, can be used to repair the amount of wear.
3 ball valve eccentric shaft and valve seat seal must be adjusted to have the experience of personnel can be carried out. (when the valve is in bad condition)
4 ball valve if temporarily installed, should be stored in dry and ventilated room, no bump or force. Need to open the valve to 5 degrees, to avoid the long-term compression of the sealing ring to reduce the elasticity of the impact of the use of life.
5 the first test the water to test the water may be due to transport or other reasons for a slight leak, the valve can be switched 5 degrees to 10 degrees two or three times, the valve will be automatically adjusted to the correct position.
6 ball valve driving device to a fastening bolt before debugging, not allowed to loose. When the valve is used for a long time if there is a leak, to drive the limiting device, fastening and loosening a bolt, inverse clock rotating ring and a locking nut, the valve closed some, because of eccentric action to eliminate wear gap to ensure valve to use, must not be in the absence of loosen the drive limiting device, fastening bolt forced the closure of the valve, it will damage the drive device.
7. Eccentric semi ball valve is a one-way valve seal, the arrow on the valve body valve sealing direction, and not the medium flow, installation when as valve, arrow with the direction of medium the same (namely forward installation), when to act as a check valve, the arrow with the direction of medium instead (reverse installation).
