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Relief Valves
Kunkle Pressure and Vacuum Relief Valves
Pressure Set Points from 1 - 15 psi
Vacuum Set Points from 1 - 16 "Hg
Construction is Cast Iron/Mild Steel
Pressure Relief Valve Data
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Valve Size
A
B
C
D (NPT)
E
Weight (lbs)
CFM @ 5 psi
CFM @ 10 psi
CFM @ 15 psi
2"
7 1/4"
3 1/4"
3 1/4"
2"
2"
7 1/2#
569
743
903
2 1/2"
8"
3 3/4"
3 3/4"
2 1/2"
2 1/2"
12 1/4#
766
1127
1368
3"
9 1/2"
4 1/4"
4 1/4"
3"
3"
18 3/4#
1110
1632
1982
Vacuum Relief Valve Data
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Valve Size
A
B
C
D (NPT)
E
Weight (lbs)
CFM @ 5" Hg
CFM @ 10" Hg
CFM @ 15" Hg
2"
6 3/4"
3 1/4"
3 1/4"
2"
2"
7#
331
513
426
2 1/2"
7 1/2"
3 3/4"
3 3/4"
2 1/2"
2 1/2"
11 3/4#
501
625
646
3"
9"
4 1/4"
4 1/4"
3"
3"
18 1/2#
726
906
935
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Engineering assistance in the 
