Jacket type eccentric hemispherical valve
- name: Jacket type eccentric hemispherical valve
- Type: PQ347X/H
- Presure: 1.0～2.5MPa
- Specifications: DN50~DN1400
- material: Gray iron, ductile iron, carbon steel, etc.
Product description
Jacket type eccentric semi ball valve using the eccentric valve body, eccentric ball and valve seat, valve stem for rotary motion in the common path automatic centering, close process pass tighter and tighter, fully meet the good sealing. The valve ball and valve seat completely out of eliminating the wear on the sealing ring, overcomes the traditional ball valve seat and ball sealing surface wear, non metal elastic material is embedded in a metal seat in, the metal surface of the valve seat is well protected. This product is especially suitable for iron and steel industry, aluminum, fiber, micro solid particles, pulp, coal ash, oil and gas and other media.
nominal diameter
Main dimensions and connection dimensions
valve size flange connnection size
L
H
H1
D
D1
D2
b
f
z-Φd
200
400
225
440
340
295
259
24
3
8-Φ22
250
450
255
492
395
350
314
26
3
12-Φ22
300
500
295
505
445
400
362
26
4
12-Φ22
350
550
345
592
505
460
422
26
4
16-Φ22
400
600
346
611
565
515
473
26
4
16-Φ26
450
650
385
698
615
565
523
28
4
20-Φ26
500
700
430
720
670
620
578
28
4
20-Φ26
600
800
530
799
780
725
677
34
5
20-Φ30
700
900
620
884
895
840
792
35
5
24-Φ30
800
1000
720
975
1015
950
899
38
5
24-Φ33
900
1100
755
1040
1115
1050
999
38
5
28-Φ33
1000
1200
874
1152
1230
1160
1106
44
5
28-Φ36
main parts material
material code
Valve body, valve cover
ball stem
sealing ring
fillers
actuator
C
WCB carbon steel
WCB
20Cr13
rubber
graphitr
Denso
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).
