UL 125:2020 free download

UL 125:2020 free download STANDARD FOR SAFETY Flow Control Valves for Anhydrous Ammonia and LP-Gas
6.8 LEVER OPERATED TRANSFER VALVE- A manual, primary type of shutoff valve that is intended tobe used at the end of a transfer hose used during the filling of containers.
6.9 LIQUEFIED PETROLEUM GAS (LP-GAS OR LPG) – Any material having a vapor pressure notexceeding that allowed for commercial propane，as defined in Standard Specification for LiquefiedPetroleum (LP)Gases，ASTM D1835,that is composed predominantly of the following hydrocarbons,either by themselves (excluding propylene) or as mixtures: propane, propylene, butane (normal butane orisobutane) and butylenes.
6.10 LP-GAS HOSE NOZZLE VALVE- A lever operated self-closing fuel transfer valve that is used witha LP-Gas dispenser to dispense LP-Gas into a container on a vehicle.
6.11 MULTIPLE FUNCTION VALVE(or MULTIPLE HEAD VALVE)- A valve incorporating several typesof valves into a single unit or body.
6.12SHUTOFF VALVE-A type of valve that incorporates a seat and seat disc member that will close aninternal orifice to prevent further flow of fluid through the valve.Shutoff valves are further categorized asprimary or secondary,and manual or automatic.
6.13 SHUTOFF VALVE,AUTOMATIC-A type of shutoff valve that uses energy (other than electricity) toopen and close the valve member, based upon some external input.
6.14 SHUTOFF VALVE,MANUAL-A type of valve that incorporates a handle, lever, handwheel or otherelement that anticipates human manipulation of the element to close the valve member.
6.15 SHUTOFF VALVE,PRIMARY- A type of valve that has no seat leakage and suitable for installationwhere a positive shutoff is required.
6.16 SHUTOFF VALVE,SECONDARY – A type of valve that may exhibit limited seat leakage whentested in accordance with these requirements and is suitable for installation only in branch or bypasspiping where a positive shutoff is not essential.
6.17VAPOR RETURN VALVE- A type of valve intended for vapor use only, which is used to equalizepressure between the supply container and the container being filled.
cONSTRUCTION
7 General
7.1 When a valve is of a design which requires the use of special pipe flanges, gaskets, bolts, or otherspecial fittings or parts for making a proper installation, such parts shall be furnished by the manufacturerwith each valve.
7.2A seat disc shall be attached to its poppet or holder, or otherwise assembled so as to prevent it frombecoming dislocated under service conditions. The means to secure the disc shall not rely on cement oradhesive.
7.3 A brazing material used for joining liquid-confining parts of a valve for LP-Gas shall have a meltingpoint (solidus temperature) of no less than 538°C (1000°F).Brazing shall not be used on valves foranhydrous ammonia.See 8.4.