GD
|
|
|
■
|
GD
High Vacuum Flapper Valve
|
|
|
■
|
GD high vacuum flapper valve is used to put through or cut off the airflow in vacuum pipeline. Applicable medium can be pure air and noncorrosive gases. According to its shaft seal structure, high vacuum flapper valve is classified into GD-J rubber shaft seal type and GD-J(b)bellows shaft seal type. According to its put-through type, it is classified into GD-J angle type and GD-S three-way type with prepumping.
|
|
|
■
|
Main Technical Performance
|
|
|
■
■
■
|
Applicability
|
105~1.3×10-4Pa(The rubber seal)
105~1.3×10-5Pa(Seal for the bellows)
|
Valve Leak Rate
|
≤1.3×10-4Pa.L/S.(The rubber seal)
≤1.3×10-5Pa.L/S.(Seal for the bellows)
|
Applicable Temperature
|
-25~+80℃(NBR)
-30~+150℃(Viton)
|
|
|
|
■
|
Materials of Main Parts
|
|
|
■
|
Body, bonnet and stem: aluminium alloy, carbon steel or stainless steel
Sealing element: NBR, Viton, bellows(shaft seal)
|
|
|
CONSTRUCTION FIGHTS(mm)
|
|
■
|
Overall and Connection Dimensions(mm)
|
|
|
■
|
Quick release flange
|
|
Model
|
DN
|
D1
|
D
|
A
|
H
|
P
|
Flange Standard
|
GD-J10(b)
|
10
|
12.2
|
30
|
40
|
124.5
|
60
|
GB4982
|
GD-J16(b)
|
16
|
17.2
|
30
|
40
|
124.5
|
60
|
GD-J25(b)
|
25
|
26.2
|
40
|
50
|
134.5
|
78
|
GD-J32(b)
|
32
|
34.2
|
55
|
58
|
153
|
78
|
GD-J40(b)
|
40
|
41.2
|
55
|
65
|
160.5
|
78
|
GD-J50(b)
|
50
|
52.2
|
75
|
70
|
203
|
78
|
|
|
|
■
|
Looper flange
|
|
Model
|
DN
|
D1
|
Do
|
D2
|
A
|
P
|
H
|
n-φc
|
DnyPre-pumping port
|
Flange Standard
|
GD-J50
|
50
|
110
|
90
|
55
|
70
|
78
|
203
|
4-φ9
|
|
GB6070
|
GD-J63
|
63
|
130
|
110
|
68
|
88
|
160
|
380
|
4-φ9
|
|
GD-J80
|
80
|
145
|
125
|
85
|
98
|
160
|
400
|
8-φ9
|
|
GD-J100
|
100
|
165
|
145
|
105
|
108
|
160
|
420
|
8-φ9
|
|
GD-J(S)160
|
160
|
225
|
200
|
165
|
158
|
160
|
575
|
8-φ11
|
DN40 GB4982
|
GD-J(S)200
|
200
|
285
|
260
|
208
|
200
|
160
|
655
|
12-φ11
|
DN50 GB6070
|
GD-J(S)250
|
250
|
335
|
310
|
258
|
208
|
250
|
690
|
12-φ11
|
DN63 GB6070
|
GD-J(S)320
|
320
|
425
|
395
|
328
|
250
|
250
|
785
|
12-φ14
|
DN80 GB6070
|
GD-J(S)150
|
150
|
220
|
195
|
156
|
158
|
160
|
575
|
8-φ12
|
DN40 GB4982
|
JB919
|
GD-J(S)300
|
300
|
380
|
350
|
308
|
250
|
250
|
785
|
8-φ14
|
DN80 GB6070
|
JB919
|
|
|