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  �� GD�͸���Փ����y���ڽ�ͨ���Д���չ�·�еĚ������m�ý��|(zh��)�鼃���՚�ͷǸ��g�Ԛ��w,������Փ����y���S��Y(ji��)��(g��u)�ɷ�GD-J�����z�S���GD-J(b)�Ͳ��y���S��ɷN,����ͨ��(d��o)��ʽ�ɷ�GD-J���ͨ��ʽ��GD-S�鎧�A(y��)��ڵ���ͨ��ʽ,��
 
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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.
 
�� GD�ͣ�����Փ����y��Ҫ���g(sh��)����
Main Technical Performance
 
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���m�÷�����Applicability ��105��1.3×10-4Pa(�S������z)
��105��1.3×10-5Pa(�S��鲨�y��)
���y�T©�ʣ�Valve Leak Rate ��≤1.3×10-4Pa.L/S.(�S������z)
��≤1.3×10-5Pa.L/S.(�S��鲨�y��)
���m�Üضȣ�Applicable Temperature ��-25��+80��(�������z)
��-30��+150��(�����z)
 
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Materials of Main Parts
 
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Body, bonnet and stem: aluminium alloy, carbon steel or stainless steel
Sealing element: NBR, Viton, bellows(shaft seal)
 
CONSTRUCTION FIGHTS(mm)
 
�� GD�ͣ�����Փ����y���μ��B�ӳߴ�(mm)
Overall and Connection Dimensions(mm)
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Model
��̖(h��o)
DN
D1
D
A
H
P
���m��(bi��o)��(zh��n)
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
 
�� GD�ͣ�����Փ����y���׷��m�B��
 
Model
��̖(h��o)
DN
D1
Do
D2
A
P
H
n-φc
Dny�A(y��)���
���m��(bi��o)��(zh��n)
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

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