2 EATONAerospace Group TF100-114C May 2013 Eaton’s Carter product line of ground fueling equipment includes a number of hydrant coupler models. Model 64804 Hydrant Coupler is derived from the standard Model 64802 Digital Coupler to provide an excess flow control feature. The same features introduced in earlier coupler Models 64800/ 64802 have been incorporated in Model 64804. Features yy Mates all standard hydrant valves in accordance with API Bulletin 1584 yy Standard excess flow control closes coupler if flow exceeds set flow rate yy Folding operating handle standard yy 2, 2½, 3 and 4-inch NPT or BSPP outlet threads available yy Studs used for connecting lower half and to affix the optional carriage assembly yy Outlet of elbow flanged to accept various outlet male adapter fittings, reducing maintenance costs if male fitting is damaged yy Options to mate to older quick disconnects (QD) available yy Thumb latches on QD — easier to remove from hose with no tools required yy Optional carrying handle available at disconnect yy Lower half of coupler (connecting unit to hydrant) has not been changed yy No adjustments on coupler. All adjustments are accomplished on digital pressure control module. yy Suitable for operating pressures of 200 psig (13.79 bar) and system proof pressure of up to 450 psig (31.026 bar) yy Pressure drop — 24 psi (1.655 bar) across mating Model 60554 Hydrant Valve and coupler yy Excess flow rate feature adjustable from 700-1100 USgpm (2649-4163 l/min) Envelope Dimensions Design Concepts Dimensions shown in inches (millimeters) Operation Information Connection to the hydrant valve is in accordance with the industry API 1584 interface standard. Model 64804 is a direct spring-loaded pressure control unit that is controlled only by Eaton’s Digital Pressure Control System. Full details of this system are outlined in the Model 64235 catalog sheet (TF100-104). The Model 64804 design is nearly identical to the widely used Model 60700-1 and the newer Model 64800 Hydrant Coupler. However, certain features have been modified to allow it to be operated digitally. Fuel pressure presented to the operating chamber through the command hose from the vehicle-mounted solenoid manifold assembly (Model 64302, 64303 or 64304, as required by the system design) causes the coupler control elbow valve to open. This establishes flow through the system. Digital commands to the manifold further command the coupler trim to a position to effect control of the pressure in the system. No air pressure is required to achieve system control, unlike the earlier Model 60700-1 and newer Model 64800, or couplers made by competing manufacturers. Pressure control is also achieved without the need for confusing venturi systems. There are no adjustments required or possible on the coupler. All pressure control adjustments are made on the control module of Eaton’s Model 64235 Digital Pressure Control System. An excess flow control module is included as standard on the coupler to effect coupler closure in the event of a hose failure that increases the flow rate to a potentially catastrophic level.
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