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Ductile Iron Check Valve
with Break-off Plug

break off.png

•    Bronze stemmed poppet
•    1/2" Break-off plug standard
•    3/8" Break-off plug optional
•    Female threads

Part No.

8RD Thread

Size

Weight lbs

668SB
675SB
685SB
676SB
679SB
677SB
687SB
678SB
690SB

-
-8RD
-
-8RD
-8RD
-8RD
-
-8RD
-8RD

2 1/2
3
3*
4
5
6
6*
8
10

15.3
12.4
13.4
25.8
36.8
49.0
65.5
64.2
110.6

All Simmons ductile iron check valves are CERTIFIED LEAD FREE, featuring an ASTM A536 ductile iron body with non-toxic polyester powder coated finish. Each valve is furnished with Buna-N O-Ring, stainless steel spring, stainless steel washer, and stainless steel locknut. All valves ¾” through 1 ½” have a working pressure of 400 PSI, while valves 2” and larger have a working pressure of 600 PSI. Check valves rated for 190°F maximum temperature.

* High Flow Design

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