gd型－高真空挡板阀
■ gd型高真空挡板阀用于接通或切断真空管路中的气流。适用介质为纯净空气和非腐蚀性气体。高真空挡板阀按轴封结构可分gd-j型橡胶轴封和gd-j(b)型波纹管轴封两种。按通导形式可分gd-j为角通型式，gd-s为带预抽口的三通型式。
■ gd high vacuum flapper valve
■ gd high vacuum flapper valve is used to putthroughor cut off the airflow in vacuum pipeline. applicable mediumcan bepure air and noncorrosive gases. according to its shaftsealstructure, high vacuum flapper valve is classified into gd-jrubbershaft seal type and gd-j(b)bellows shaft seal type. accordingtoits put-through type, it is classified into gd-j angle typeandgd-s three-way type with prepumping.
■ 主要技术性能 maintechnicalperformance
■ ■ ■ 　适用范围：applicability 　105～1.3×10-4pa(轴封为橡胶) 　105～1.3×10-5pa(轴封为波纹管)
　阀门漏率：valve leak rate 　≤1.3×10-4pa.l/s.(轴封为橡胶) 　≤1.3×10-5pa.l/s.(轴封为波纹管)
　适用温度：applicable temperature 　-25～+80℃(丁腈橡胶) 　-30～+150℃(氟橡胶)
■ 主要零件材料 materials of mainparts
■ ■ 阀体、阀盖、阀杆：铝合金、碳钢或不锈钢 密封件：丁腈橡胶、氟橡胶、波纹管(轴封)。body,bonnet and stem: aluminium alloy, carbon steel or stainlesssteelsealing element: nbr, viton, bellows(shaft seal)
construction fights(mm)
■ 外形及连接尺寸(mm) overall andconnectiondimensions(mm)
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■ 快卸法兰连接
model 型号
dn
d1
d
a
h
p
法兰标准
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
■ 活套法兰连接
model 型号
dn
d1
do
d2
a
p
h
n-φc
dny预抽口
法兰标准
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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