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Structure and Principle of
Anti-Backflow Valve
Plug equipped with anti-backflow valve
The anti-backflow valve in the plug is designed specifically for welding, instantly preventing gas from flowing back into a tank or hose and mixing with other gas. It is equipped with a special stop valve whichinstantly senses backflow and shuts off the gas. In addition to the conventional acetylene series there is now a new oxygen line-up, providing increased safety.
 
 
日东接头 Nitto Cupla
Dimensions and Weight Tables    
     
日东接头 Nitto Cupla
日东接头 Nitto Cupla
   
日东接头 Nitto Cupla
 
Model
Dimensions(mm)
Weigh
(g)
Applications
Lp
C
A
¢HP
¢T
¢BP
For oxygen
22PH
55
23.5
28
11
8
5
16
For 1/4" hose
25PH
9
19
For 5/16" hose
For acetylene
33PH
57
25.5
28
14
10.5
7.5
22
For 3/8" hose
35PH
9
6
20
For 5/14" hose
 
日东接头 Nitto Cupla
 
Model
Dimensions(mm)
Weight
(g)
Applications
Ls
¢D
A
¢T
¢Bs
For oxygen
22SH
64
19.8
28
8
5
52
For 1/4" hose
25SH
9
55
For 5/16" hose
For acetylene
33SH
65
22.6
28
10.5
7.5
69
For 3/8" hose
35SH
9
6
67
For 5/14" hose
     
日东接头 Nitto Cupla
 
Model
Dimensions(mm)
Weight
(g)
Applications
Lp
C
A
HP
T
¢BP
For oxygen
22PF
43
23.5
19
Hex.19
M16×15
5
31
For oxygen torch
25PF
43.5
9
Hex.17
W12.5
26
For acetylene
33PF
44.5
25.5
10
Hex.19
M16×
1.5L
7.5
36
For gas torch
 
日东接头 Nitto Cupla
 
Model
Dimensions(mm)
Weight
(g)
Applications
Ls
¢D
A
T
¢Bs
Hs
For oxygen
22SF
52
19.8
12
M16×
15
5
Hex.19
80
For oxygen torch
For acetylene
33SF
54
22.6
12
M16×
1.5L
5
Hex.19
96
For gas torch
     
日东接头 Nitto Cupla
 
Model
Dimensions(mm)
Weight
(g)
Applications
Lp
C
A
HP
T
¢BP
For oxygen
22PHB
69.5
23.5
28
Hex.14
8
5
31
For 1/4" hose
25PHB
9
34
For 5/14" hose
For acetylene
33PHB
70.5
25.5
28
Hex.14
10.5
7
41
For 3/8" hose
35PHB
9
6
39
For 5/16" hose
 
日东接头 Nitto Cupla
 
Model
Dimensions(mm)
Weight
(g)
Applications
Ls
¢D
A
Hs
T
¢Bs
For oxygen
22SM
52
19.8
11
¢14×
Hex.12
PT1/4"
7.5
51
PT1/4"
For acetylene
33SM
54
22.6
11
¢17×
Hex.14
PT3/8"
10
77
PT3/8"
     
日东接头 Nitto Cupla
 
Model
Dimensions(mm)
Weig
(g)
Applications
Lp
C
A
HP
T
¢BP
For oxygen
22PFB
48.5
23.5
10.5
Hex.19
M16×
1.5
5
36
For oxygen torch
For acetylene
33PFB
48.5
25.5
10.5
Hex.19
M16×
1.5L
7.5
41
For gas torch
   

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