Chek-Lok® Excess Flow Valves are designed to provide a convenient means of withdrawing liquid from stationary containers prior to moving the container. The Chek-Lok® permits one transfer shut-off valve with an adapter to be used interchangeably on a number of tanks.

The 7590U and 7591U Chek-Loks® are also designed for use on permanent installations provided the excess flow valve is sized properly for the system and piping.
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7591U Series 1 1/4 Inch (in) Inlet Connection Size Chek-Lok® Excess Flow Valve - (007590U)

7590U Series 3/4" Inlet Connection Size Chek-Lok® Excess Flow Valve
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7591U Series 1 1/4 Inch (in) Inlet Connection Size Chek-Lok® Excess Flow Valve - (007590U)

7591U Series 1 1/4" Inlet Connection Size Chek-Lok® Excess Flow Valve
Price QUOTE
Description N/A

Chek-Lok® Excess Flow Valves are designed to provide a convenient means of withdrawing liquid from stationary containers prior to moving the container. The Chek-Lok® permits one transfer shut-off valve with an adapter to be used interchangeably on a number of tanks.

The 7590U and 7591U Chek-Loks® are also designed for use on permanent installations provided the excess flow valve is sized properly for the system and piping.
Material N/A Brass
Capacity N/A 20 gpm N/A 35 gpm
Inlet Connection Size N/A 3/4 in N/A 1 1/4 in
Outlet Connection Size N/A 1-5/8 in
Inlet Connection Type N/A Male National Pipe Thread (MNPT)
Outlet Connection Type N/A Unified Fine Thread (UNF)
Hexagonal Body Wrench Flats (A) N/A 1-3/4 in
Hexagonal Wrench Flats (C) N/A 1-5/16 in
Approximate Effective Length (B) N/A 1-7/16 N/A 1-7/8
Approximate Propane Liquid Closing Flow N/A 20 gpm N/A 35 gpm
Note for Closing Flow N/A

Based on horizontal installation of excess flow valve. Flows are slightly more when valves are installed with outlet up; slightly less when installed with outlet down.
Note N/A

Multiply flow rate by 0.94 to determine liquid butane flow.
In some cases, it may be necessary to use an in-line excess flow valve to protect the downstream piping. This valve is not recommended for use as a liquid source for pumps.
Rating N/A Underwriters Laboratories (UL®) Listed
Alternate Part Number N/A 7590U N/A 7591U