2 EATON Aerospace Group TF100-95D May 2013 Eaton’s Carter Model 64129 3-inch Bottom Loading Valve and accompanying Model 64079 Level Sensor are designed for use in refuelers without available air pressure to provide off-loading capability. Bottom loading control is accomplished automatcally when the tank liquid level reaches the pre-set level sensor. If desired, the level sensor can be replaced with a solenoid valve and an optic probe to effect shutoff control. A cable mechanically connected to the off-loading lever on the Model 64129 handles offloading control. Unlike competitors’ comparable models, which Eaton’s valve can directly replace, Model 64129A can perform properly with any type of refueling pump, positive displacement or centrifugal, without inadvertently opening. Inlet pressures during loading are also not restricted, making it possible to load at all flow rates available. Features yy Valve uses lever actuation for off-loading — 90 lbs minimum yy Inlet mates victaulic coupling (standard), 3-inch TTMA pipe flange available on special order yy Unit will not open with suction applied to outlet, can be used with positive displacement pumping systems yy Valve main seal will not be dislodged with flow rates to 1,100 gpm (4163 l/min) or pressures over 75 psi (5.171 bar) yy Pilot valve is identical on all Eaton bottom loading components for lower maintenance costs yy No through-hole in the diaphragm in the pilot to cause leakage and ultimate failure yy Internal valve mates standard TTMA sump flange and is provided with lever actuated off-loading control yy Low pressure loss: Bottom loading — 11 psi (.758 bar) at 300 gpm (1135 l/min) Off-loading — 1.8 psi (.124 bar) at 300 gpm (1135 l/min) Level Sensor There are no moving parts or seals in the Model 64079 level sensor which, when used with Model 64129A Bottom Loading Valve, will provide high level bottom loading control. There are no wearing parts in the level sensor, hence it lasts indefinitely. Truck vibration will have no affect on the sensor, unlike float valves, which are subject to vibration damage. It is available with an optional mounting stud for adjustable level control. The stud is located outside of the collector/drain can for better level control. A collector/drain can and precheck feature are provided as standard equipment. Installation Tips yy Install the unit with sufficient flexible line to the level sensor for easier removal and maintenance Design Concepts yy Inlet line to Model 64079 level sensor must be 3/8inch diameter tubing. It should be routed from a port on the bottom loading adapter, such as Eaton Models 6958 or 61528 that have ports designed for this application. (See catalog sheet TF100-77 for adapter choices). Routing the inlet pressure source closer to the internal valve may not allow sufficient pressure for the system to function correctly. If the optional mounting stud (Option A) is used, sufficient length of flexible tubing should be used to allow for adequate adjustment. yy Line between the pilot on Bottom Loading Valve Model 64129A and Level Sensor Model 64079 should also be 3/8-inch diameter for best operation yy If desired, a separate precheck system may also be routed from the adapter to the precheck port on the level sensor, although the same affect can be achieved by installing a 3/8inch spring-loaded normally open ball valve in the inlet pressure line. It will be necessary to adjust the precheck gate in the bottom of the level sensor to make the precheck effective in either case. This is a trial and error adjustment. Note that there are no “tuning” plugs on Eaton Model 64079 as on the Whittaker Model F613. A simple “gate” type valve in the bottom of the precheck can provides adjusting of the precheck flow. yy It is essential for safety reasons to install a plastic tube to the drain fitting on the bottom of the level sensor. Draining fuel from the level sensor, if not collected and drained properly, could generate a static discharge, which could lead to a fire. yy The optional mounting stud is located outside of the precheck and drain cans on the level sensor. Unlike the Whittaker Model F613, Eaton’s level sensor has no holes to plug with loose O-rings if the stud is used. If not used, the can on the Eaton unit is already sealed and there are no plugs to install. If installed correctly the level in the tank can be adjusted over a wide range simply by screwing the stud up or down to the desired level. yy If Model 64129A internal Valve is to be used with either a Civacon Liberty optic probe system or an equivalent Scully system, a three-way solenoid valve must be installed in the pressure line from the adapter. When the tank level is below the probe, the inlet pressure should be routed to the pilot on the Model 64129A valve to cause it to open. When the optic probe is sensing fuel (level below the probe) the pilot on the Model 64129A valve must be vented to a tank and the inlet pressure shutoff. This will cause the valve to close and stop the bottom loading process.
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