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BPQ-16
 FLANGE END DOUBLE ORIFICE STANDARD AIR VALVE

Scope Of Application:
norminal pressure 1.6MPa
shell 2.4MPa
seat 1.76MPa
suitable medium water
temperature < 100°C

Technical Requirement:
1.Design, manufacture conforms to JKR20200-0043-99.
2.Flange drilled conforms to BS EN 1092.

size D
 
D1
 
D2
 
B
 
f
 
n-d
40
 
150
 
110
 
84
 
19 3 4-19
50
 
165
 
125
 
99
 
19 3 4-19
65
 
185
 
145
 
118
 
19
 
3
 
4-19
80
 
200
 
160
 
132
 
19 3 8-19
100
 
220
 
180
 
156
 
19 3 8-19
125
 
250
 
210
 
184
 
19 3 8-19
150
 
285
 
240
 
211
 
19 3 8-23
200
 
340
 
295
 
266
 
20 3 12-23
250 405 355 319 22 3 12-28

300

460 410 370 24.5 4 12-28

34 float ball plastic ABS ISO 2580 ISO 2580
33 small orifice gasket EPDM BS2494 Type W  
32 washer steel BS970 43A GB700-88 Q235
31 bolt steel BS970 43A GB700-88 Q235
30 nut steel BS970 43A GB700-88 Q235
29 ball seal small orifice EPDM BS2494 Type W  
28 air release nipple plastic ABS ISO 2580 ISO 2580
27 small orifice cover ductile iron BS2789 Gr500-7 GB1348 QT500-7
26 O-ring EPDM BS2494 Type W  
25 washer steel BS970 43A GB700-88 Q235
24 bolt steel BS970 43A GB700-88 Q235
23 nut steel BS970 43A GB700-88 Q235
22 middle orifice cover ductile iron BS2789 Gr500- GB1348 QT500-7
21 cap ductile iron BS2789 Gr500-7 GB1348 QT500-7
20 bolt steel BS970 43A GB700-88 Q235
19 O-ring EPDM BS2494 Type W  
18 stem stainless steel BS970 410S21 GB1220-92 1Cr13
17 support of stem ductile iron BS2789 Gr500-7 GB1348 QT500-7
16 stem nut cast bronze BS 1400 LG2 GB1176-87 ZCuSn5Pb5Zn5
15 disc ductile iron BS2789 Gr500-7 GB1348 QT500-7
14 bolt steel BS970 43A GB700-88 Q235
13 washer(pressed board) ductile iron BS2789 Gr500-7 GB1348 QT500-7
12 disc seat ring EPDM BS2494 Type W  
11 body seat ring cast bronze BS 1400 LG2 GB1176-87 ZCuSn5Pb5Zn5
10 dust cap ductile iron BS2789 Gr500-7 GB1348 QT500-7
9 washer steel BS970 43A GB700-88 Q235
8 washer steel BS970 43A GB700-88 Q235
7 nut steel BS970 43A GB700-88 Q235
6 large orifice cover ductile iron BS2789 Gr500-7 GB1348 QT500-7
5 ball seal large orifice EPDM BS2494 Type W  
4 ball seal large orifice EPDM BS2494 Type W  
3 flaot ball plastic ABS ISO 2580 ISO 2580
2 screw plastic ABS ISO 2580 ISO 2580
1 body ductile iron BS2789 Gr500-7 GB1438 QT500-7
NO. Name of part Material British standard Chinese standard

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