UL Standard (UL 125, Edition 1)
Valves for Anhydrous Ammonia and Propane (Other than Safety Relief) (Ed. 1)
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Brief description
These minimum requirements cover the following types of anhydrous ammonia and liquefied petroleum gas (LP-Gas) valves that are used to control the flow of liquid and/or vapor into and out of containers, or in piping systems between containers, or between containers and utilization equipment, and are for use at temperatures within the range of -40 °C (-40 °F) to 55 °C (130 °F): a) Shutoff Valves (primary or secondary, and manual or automatic), b) Excess Flow Valves, c) Back Pressure Check Valves, d) Filler Valves, e) Vapor Return Valves, f) Actuated Liquid Withdrawal Excess-Flow Valves, g) Multiple function valves, h) Internal valve, i) Emergency shutoff valve, j) Lever operated transfer valve, and k) LP-Gas Hose Nozzle Valve.
