Basic In-Line Check Valve From Durabla
Basic Check Valve Features:
1/4" to 2-1/2" Line size
450 to 6000 CWP
Threaded ends
Stainless steel construction
Spring-assisted silent closing
Horizontal or vertical installation
Tight shut-off
Soft seat option

Model

 Size Weight Price
BSA 1-1/4"
1-1/2"
2"		 2.25
3.9
4.3		 Call
BSE 1/4"
3/8"
1/2"
3/4"
1"		 .38
.38
.38
.88
1.25		 Call
BSS 1/4"
3/8"
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"		 .38
.38
.38
.88
1.25
2.25
3.75
7
7		 Call
BSSH6 1/4"
3/8"
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"		 .38
.38
.38
.88
1.25
2.25
3.75
7
7		 Call
BSSH7 1/4"
3/8"
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"
2-1/2"		 .38
.38
.38
.88
1.25
2.25
3.75
7
7		 Call
BS316SS 1/4"
3/8"
1/2"
3/4"
1"
1-1/4"
1-1/2"
2"		 .38
.38
.38
.88
1.25
2.25
3.75
7		 Call
 
Technical Information
Basic Check CV Friction Loss
(Feet of Pipe)		 Valve Cracking Pressure
Line Size Inlet
(FNPT) A		 Outside Thread
(MNPT) B		 PSI Inches
of Water
1/4" 1" 5.8 7 0.6 16.7
3/8" 1" 5.8 7 0.6 16.7
1/2" 1" 5.8 7 0.6 16.7
3/4" 1-1/2" 13.2 6 0.45 12.5
1" 2" 23.1 7 0.38 10.5
1-1/4" 2-1/2" 36 12.5 0.2 5.5
1-1/2" 3" 57.4 11 0.14 3.9
2" 4" 90 16 0.15 4.3
2-1/2" 4" 90 16 0.15 4.3
Cold, Non-Shock Pressure Rating
Size 1/4" 3/8" 1/2" 3/4" 1" 1-1/4" 1-1/2"
Basic Check 
BSS BSA BSE		 2500 2000 1500 850 700
High Pressure 
BSSH6		 6000 5500 3000 1100 900
Basic Check 
BSSH7		 6000 6000 6000 4000 2700
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