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Designed for mounting in flanged tank connections with internal threads in the bottom of a container. They may be used in filling, withdrawal or vapor equalizing application. They provide high flow capacity with low pressure drop to minimize pump inlet line cavitation.

If a riser pipe to the vapor space is used with these excess flow valves, the minimum inside diameter of the riser pipe must be at least two times the valve thread size in order not to restrict flow to the side inlet ports.

Flange mounted excess flow valves are readily accessible for servicing and completely enclosed and protected in event of fire. Because there is no direct connection between external piping and the valve, stresses imposed on piping will not affect the excess flow valve.
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Item #

A. Inlet Connection NPT

C. Effective Thread (Approx.)

D. Threaded End to Port

Approximate Closing Liquid Flows

A3500L4 N/A 2 in N/A 3/4 in N/A 1-15/16 in N/A 75 gpm/propane
A3500N4 N/A 2 in N/A 3/4 in N/A 1-15/16 in N/A 125 gpm/propane
A3500P4 N/A 2 in N/A 3/4 in N/A 1-15/16 in N/A 150 gpm/propane
A3500R6 N/A 3 in N/A 1 in N/A 1-9/16 in N/A 150 gpm/propane
A3500T6 N/A 3 in N/A 1 in N/A 1-9/16 in N/A 200 gpm/propane
A3500V6 N/A 3 in N/A 1 in N/A 1-9/16 in N/A 250 gpm/propane
A4500Y8 N/A 4 in N/A 1-1/16 in N/A 1-15/16 in N/A 500 gpm/propane
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