4 EATONAerospace Group TF100-91C June 2013 Examples: 64051DH — 1½-inch male NPT interchange coupling with dust cap 64051DK — 1½-inch male BSPP non-swivel interchange coupling with dust cap Overwing/ CCR Interchange Model 64051 Shown below, installed on overwing nozzle not manufactured by Eaton. See part 4 of Ordering Data section on page 3 for additional information Hose End Control Valves The Hose End Control Valve, available as Option F in Part 2 (see Ordering Data, page 3), is designed to provide a maximum control pressure at its outlet (at the pressure sensing port of the nozzle). The control pressure is a function of the main spring that loads the poppet. In addition to limiting downstream pressure under flow conditions, the regulator is designed to limit surge pressures caused by aircraft (downstream) valve closures. Lockup pressure (downstream pressure trapped between a closed regulator and a closed downstream system) is also limited. Refer to Model 60129-1 catalog sheet (TF100-76) for more details on how this is accomplished. The following characteristics are typical: • Normal spring setting (maximum pressure limits will be 5 psi (0.345 bar) greater than spring) — 35 psi, 45 psi (3.103 bar) and 55 psi (3.792 bar) available • Surge pressure control — 75 psi (5.171 bar) maximum with 0.5 second valve closure (minimum) • Lock up pressure —10 psi (0.689 bar) maximum over spring setting for 45 psi (3.103 bar) and 55 psi (3.792 bar) HECVs; 20 psi (1.379 bar) maximum over spring setting for 35 psi (2.415 bar) unit • Pressure limitation — 5 psi over spring setting with inlet pressure up to 100 psi (6.895 bar) • Hysteresis (difference in pressure limits between increasing and decreasing flow rates) — pressure limits with decreasing flow rates will normally be slightly greater than for increasing flow rates • Defueling is possible through the HECV. However, a blockout device is required to maintain maximum flow. A blockout device is also recommended if system secondary control valve is to be checked. Use blockout device part number 61656. Related Equipment Pressure Drop Curves The curves presented (right) are typical for the inlet pressures and flow rates shown in a system with appropriate back pressure. These curves are applicable to all Eaton HECV models. Curve 1 Control pressure with 100 psi (6.895 bar) inlet pressure Curve 2 Control pressure with 90 psi (6.205 bar) inlet pressure Curve 3 Control pressure with 75 psi (5.171 bar) inlet pressure 55 psi HECV 40 (2.758) 40 (2.758) 40 (2.758) 30 (2.068) 30 (2.068) 30 (2.068) 20 (1.379) 20 (1.379) 20 (1.379) 50 (3.448) 50 (3.448) 50 (3.448) 60 (4.137) 60 (4.137) 60 (4.137) 45 psi HECV 1 2 3 35 psi HECV 1 2 3 Outlet Pressure - psi (bar) 1 2 3 100 (378) 200 (757) 300 (1,135) 400 (1,514) 500 (1,892) 600 (2,271) Flow Rate - USgpm (l/min) 100 (378) 200 (757) 300 (1,135) 400 (1,514) 500 (1,892) 600 (2,271) Flow Rate - USgpm (l/min) 100 (378) 200 (757) 300 (1,135) 400 (1,514) 500 (1,892) 600 (2,271) Flow Rate - USgpm (l/min)
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