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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.

Unit of Measure

Specifications

Material

 N/A Brass

Capacity

 N/A 35 gpm

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 1-7/8

Rating

 N/A Underwriters Laboratories (UL®) Listed

Alternate Part Number

 N/A 7591U

Connection

Inlet Connection Size

 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)

Propane Liquid Capacity

Approximate Propane Liquid Closing Flow

 N/A 35 gpm

Note

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.