10 Deadman Twin Sensing hose is a flexible air conduit incorporated in pneumatic closed-circuit control systems designed to prevent fuel spills during aircraft fueling operations. The hose is connected to air-actuated shut-off valves which are controlled by the aircraft refueling operator at all times during refueling operations. When the operator engages the handle/switch, fuel flows. When the operator releases the handle/ switch – either accidentally or intentionally – fuel delivery automatically shuts off at the operator-end of the hydrant or truck refueling system. Deadman Twin Sensing hose lines are bonded to prevent separation and maximize flexibility. The hose features a high grade oil resistant nitrile tube combined with an abrasion, oil and weather resistant Neoprene cover. Deadman Twin Sensing Hose Tube: Black nitrile Reinforcement: Multiple textile spirals Cover: Green and red Neoprene; smooth finish Temp Range: -30°F to +200°F (-34°C to +93°C) Brand Method: White ink Brand Example: (Red hose only): PARKER SERIES 7139 DEADMAN TWIN HOSE 1/4 ID (6.4 MM) 200 PSI MAX WP MADE IN USA (DATE CODE) Design Factor: 4:1 Industry Standards: None applicable Applications: Air hose incorporated in pneumatic closedcircuit control systems associated with aircraft refueling operations Compare To: Carter 64406; Veyance Deadman Aircraft Refueling Part Number ID (in) ID (mm) Reinf Plies OD (in) OD (mm) Approx Wt (lbs/ft) Drum/ Reel OD (in) Max Rec WP (psi) Max Lg (ft) Stock Status * 7139-251VEL 1/4 6.4 2 .530 13.5 0.19 2.0 200 800 Y Packaging: Reels Coupling Recommendation: Refer to CrimpSource at www.safehose.com for coupling recommendations and crimp specifications. * Stock: “Y” indicates stocked item; “N” indicates non-stocked item. Stock status subject to change. Contact Parker Customer Service. WARNING! Couplings attached with bands or clamps may reduce the working pressure of the hose assembly to less than the maximum rated working pressure of the hose. Refer to the NAHAD Industrial Hose Assembly Guidelines. Series 7139 !
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