API IP Spec 1584-2001 pdf free download

API IP Spec 1584-2001 pdf free download.FOUR-INCH HYDRANT SYSTEM COMPONENTS AND ARRANGEMENTS .
2.1 TERMS AND DEFINITIONS For the purposes of this publication the followingtermns and definitions apply: clean breakaway: when used in deseribing the breakaway of the hydrant coupler from the hydrant pit valve adapter, means that the coupler breaks away completely to allow the pit valve outlet adapter poppet to close. In practice, complete seating of the poppet cannot be guaranteed as coupler debris that may be left could prevent full poppet closing hydrant coupler: a unit that is attached to the inlet end of the hydrant dispenser inlet hose or boom assembly to provide for quick coupling to the outlet adapter of the hydrant pit valve assembly. The coupler may be one of four types, any of which can be equipped for product selectivity: 一standard coupler: a quick coupling device that allows for manually opening and closing the poppet on the hydrant pit valve assembly and provides a flow path from the hydrant pit valve assembly to the dispenser. – – – direct acting digital control coupler: a coupler that incorporates the same features as a standard coupler, but uses a digital module to control pressure and flow for each hose combination. A timer deadman may be included with this systemas an option. -direct acting presure control coupler: a coupler that incorporates the same features as the standard unit, but also includes air-operated deadman and spring biased pressure regulation at a remote scnsing point. This coupler also has optional excess flow control. – pilo1-operated pressure control coupler: a coupler thathas the same features as the standard unit, plus the air deadman feature, but controls pressure by means of a pilot mechanism. This coupler also has optional excess flow control (with either single or dual flow rate settings). hydrant coupler carriage assembly: a device ftted to the hydrant coupler to assist in moving the coupler to and from the pit valve whilst keeping the coupler from dragging on the ground. Note: It generally takes the form of two small wheels on a structure that may be folded up beneath the inlet hose when not in u8e, hydrant dispenser: (also known as “hydrant servicer’. ‘aircraft fuel servicer’ or “hydrant cart) a fuelling unit used to receive fuel from a hydrant fuel supply system and deliver it to aircraft. It may be self-propelled, trailer mounted or skid mounted.
Note: It is normally ftted with filtration, pressure control, deadman control and metering equipment and is connected to the hydrant pit valve by a hydrant coupler and an inlet hose or metal boom assombly. The hydrant dispenser is used to deliver fuel into aircraftvia a delivery hose and nozze. hydrant plt valve assembly: a valve that is vertically mounted on the flanged riser of an airport fuel piping system, Note: The valve is composed of three components: the flangod inlet pilot- operated valve, the pilot device and the outlet adapter that mates with the hydrant coupler. Optional features may be included. – intermediate strainer. an optional fine mesh screen that is mounted internal to the hydrant pit valve assembly, normally between the pilot-operated valve and the outlet adapter. Note: The use of such a strainer is not recommended. – outlet adapter:. the outlet portion of the hydrant pit valve assembly to which the hydrant coupler mates. The outlet adapter has a poppet that is opened and closed by the coupler poppet. The outlet adapter provides a seating for the poppet and for optional product selectivity. – pilot device: a mechanism which diverts pressure to and from the actuating element of the pilot- operated valve to enable it to either open or close in a controlled manner, Note: The required methods for operating the pilot device are defined in 3.2.8.