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Control valve

Huijin Valve: a professional manufacturer of regulating valves.

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QGT type pneumatic ball valve

QGT type pneumatic ball valve
QGT pneumatic ball valve is a specially designed and carefully manufactured product based on the introduction of foreign advanced technology. It adopts intelligent control and positioning, and is matched with electrical valve positioner. It can control the operation by inputting 4-20mADC signal and 0.4 ~ 0.7MPa air source, and realize the adjustment of parameters such as pressure, flow, temperature, and liquid level. It uses compressed air as the power, and the valve rod drives the valve core to rotate 90 ° in the valve body to achieve the fully open-to-close action. This product is divided into metal seal and soft seal according to its sealing performance. It has the advantages of compact structure, small size, reliable operation, good sealing, easy maintenance, convenient installation, and strong adaptability. It is especially suitable for occasions where the medium is viscous, particle-containing, and fibrous. Can be widely used in petroleum, chemical industry, teaching equipment, light industry, high-pressure equipment, pharmaceutical, papermaking and other industrial automatic control systems for remote centralized control or local control.


First, the valve body
Nominal diameter: 15 ~ 200mm
Nominal pressure: PN1.6 4.0 6.4MPa
Connection form: flange type according to JB78-59 JB79-59
Material: WCB, HT200, ZG1Cr18Ni9Ti,
ZG0Cr18Ni12Mo2Ti, lined with tetrafluoroethylene, CF8 (304),
CF8M (316), CF3M (316L)
Temperature range: normal temperature -20 ℃ ~ + 180 ℃
Medium temperature -40 ℃ ~ + 350 ℃
Filler: V-type PTFE filler, impregnated PTFE filler,
Asbestos woven filler, flexible graphite.


Second, the valve components
Spool type: O-type spool flow characteristics: fast opening characteristics material: ICr18Ni9Ti, 0Cr18Ni12Mo2Ti
Seat material: Polytetrafluoroethylene (PTFE), special PPL, metal seat adjustable ratio: 350: 1


Third, the executive agency
Cylinder working pressure: 0.4 ~ 0.7Mpa
Cylinder switching time: Double acting 1 ~ 5 seconds Air consumption of cylinder: 1 ~ 131L
Solenoid valve power supply: 220VAC, 24VDC
Cylinder form: single cylinder or double cylinder


Fourth, the flow characteristics Kv value
Nominal diameter (DN)
Kv value at different opening angles
temperature
10o
20o
30o
40o
50o
60o
70o
80o
90o
50
2
4
9
17
32
60
97
151
215
80
6
11
twenty two
44
83
155
250
389
550
100
9
18
35
71
133
248
398
620
890
150
20
40
80
160
300
560
900
1400
2000
200
36
72
143
286
737
1002
1611
2506
3580
250
57
113
226
453
848
1582
2543
3955
5650
300
81
163
325
651
1220
2278
3661
5695
8100


Five, specifications and performance table
Nominal diameter DN
15
20
25
32
40
50
65
80
100
125
150
200
Flow coefficient (Kv)
20
38
72
110
170
215
380
550
890
1400
2000
3580
Range of action
0-90
Allowable pressure difference ΔP
Less than nominal pressure (1.6MPa)
Leakage Q
Tested according to API598 standard without leakage
Basic error
2% with positioner
Return difference
2% with positioner
dead zone
0.6% with positioner
Six, QGT641F flange type pneumatic ball valve
Installation dimensions QGT641F-16 (1.6MPa), 25 (2.5Mpa), 40 (4.0MPa) pneumatic ball valve
DN
L
H
D
D1
D2
b
f
D3
Z-d1
15
130/130/140
279
95
65
45
14/16/16
2
40
4-Φ14
20
140/140/150
282
105
75
55
14/16/16
2
51
4-Φ14
25
150/150/165
295
115
85
65
14/16/16
2
58
4-Φ14
32
165/165/180
298
135
100
78
16/18/18
2
66
4-Φ18
40
180/180/200
325
145
110
85
16/18/18
3
76
4-Φ18
50
200/200/220
332
160
125
100
16/20/20
3
88
4-Φ18
65
220/220/250
422
180
145
120
18/22/22
3
110
4-Φ18 / 8-Φ18 / 8-Φ18
80
250/250/280
558
195
160
135
20/22/22
3
121
8-Φ18
100
280/280/320
573
215/230/230
180/190/190
155/160/160
20/24/24
3
150
8-Φ18 / 8-Φ23 / 8-Φ23
125
320/320/360
605
245/270/270
210/220/220
185/188/188
24/28/30
3
176
8-Φ18 / 8-Φ25 / 8-Φ25
150
360/360/400
644
280/300/300
295/310/320
210/218/218
24/28/30
3
204
8-Φ23 / 8-Φ25 / 8-Φ25
200
400/400/550
850
335/360/375
295/310/320
265/278/282
26/34/38
3
260
12-Φ23 / 12-Φ25 / 12-Φ30
Note: The data xx / xx / xx in the table are 1.6MPa, 2.5MPa and 4.0MPa respectively. L structure length data can be provided by the user.


Seven, QGT671F Wafer type ultra short pneumatic ball valve
Main shape and connection size: QGT671F-16 (1.6MPa), 25 (2.5MPa), 4. (4.0MPa)
Note: The data XX / XX in the table are 1.6MPa and 2.5MPa respectively.
DN
d
L
H
D
D1
D2
b
f
L0
Z-Md
15
14
35
328
90
65
45
14/16
2
180
4-M12
20
19
38
335
100
75
55
14/16
2
180
4-M12
25
25
42
350
110
85
65
14/16
2
180
4-M12
32
29
50
380
130
100
78
16/18
2
220
4-M16
40
38
60
410
145
110
85
16/18
3
220
4-M16
50
48
70
442
160
125
100
16/20
3
260
4-M16
65
64
95
452
180
145
120
18/22
3
260
4 / 8-M16
80
76
118
495
190
160
135
20/22
3
296
8-M16
100
95
140
538
215/230
180/190
155/160
20/24
3
350
8-M16 / 20
125
118
175/195
585
245/270
210/220
185/188
24/28
3
350
8-M16 / 24
150
150
210/260
708
280/300
240/250
210/218
24/28
3
439
8-M20 / 24


Eight, Taiwan three-piece pneumatic ball valve
Main dimensions and connection dimensions: QGT611F-25 (2.5MPa), 40 (4.0MPa), 64 (6.4MPa) pneumatic ball valves
DN
G
d
L
L0
H
15
1/2 ″
15
75
180
280
20
3/4 ″
20
80
180
285
25
1"
25
90
180
295
32
11/4 ″
32
110
220
300
40
11/2 ″
40
120
220
312
50
2"
50
140
260
320


Nine, model preparation instructions
Q
GT
6
71
F
16
C
G
Valve code
Implementing agency:
Connection Type:
Material of sealing surface:
Nominal pressure:
Body material:
Temperature type:
Q: means ball valve
6: indicates pneumatic
71: indicates wafer type
F: indicates tetrafluoroethylene
16: indicates 1.6 MPa
C: indicates carbon steel
G: medium temperature type
41: indicates the flange
H: Means metal seal
25: indicates 2.5MPa
P: stainless steel
Omitted at room temperature
11: indicates silk button
40: 4.0MPa
64: indicates 6.4 MPa


Ten, ordering instructions
1. Product model and name 2. Nominal diameter DN (mm) 3. Nominal pressure 4. Flow characteristics requirements 5. Valve body material and valve trim material
6. Medium type and temperature range 7. Pressure before and after the valve (differential pressure) 8. Seal type 9. Supporting accessories, it is recommended that users install three-piece air filter and two-position five-way solenoid valve
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