User manual BENDIX SS-1 SHUT OFF VALVE

[. . . ] Important Note: The SS-1 TM shut-off valve is application specific due to its pressure settings. It is therefore important to use the proper part number when replacement is required. IN ADDITION: The SS-1TM shut-off valve and SV-1TM synchro valves are identical in appearance and similar in operation but have substantial internal differences and must not be confused or used interchangeably. The SV-1TM synchro valve incorporates an internal exhaust passage through its piston, which allows delivery pressure to be vented to atmosphere while the SS-1TM does not. [. . . ] The amount of 2 CONTROL VALVE CON SS-1TM VALVE DEL SUP RESERVOIR RESERVOIR Pilot Operation TRACTOR PROTECTION CONTROL VALVE CON SS-1TM VALVE DOUBLE CHECK VALVE DEL SUP HOSE COUPLING "GLAD HAND" BRAKE VALVE Pilot Operation - Tractor Protection Application CON SS-1TM VALVE RESERVOIR DEL SUP Automatic Operation - Common Control & Supply FIGURE 3 TRACTOR PROTECTION SYSTEM air pressure "trapped" is dependant upon the specific part number of the valve. Valves used in a tractor protection system application will "trap" less than 5 psi while other SS-1TM valves will "trap" approximately 10 psi. AUTOMATIC (self actuating at a preset pressure) Automatic operation of the SS-1TM shut-off valve occurs when the pressure at the supply and control port is the same. This is referred to as "common control and supply" and can be accomplished by connecting the valve's control port to its supply port using a pipe or tubing tee. With common control and supply pressure, the valve opens (delivers air) on ascending air pressure and closes on descending pressure. The pressures at which delivery and closure occur differ for various part numbers. Opening and closing pressures are specified for the various part numbers. It should be noted that as supply and control pressure descends delivery pressure will also decrease but will not be completely removed. Refer to the "Pilot" operation in this section. Important: Consult Bendix® cataloging and/or Bendix® Engineering for specific opening and closing control pressures when the SS-1TM valve is used in the automatic mode. When using the SS-1TM shut-off valve in this manner, the control signal ramp rate should be limited by orificing or other methods. Please contact Bendix® Engineering with specific application requirements. a dryer reservoir module, be sure to drain the purge reservoir. Following the vehicle manufacturer's recommended procedures, deactivate the electrical system in a manner that safely removes all electrical power from the vehicle. Never exceed manufacturer 's recommended pressures. Never connect or disconnect a hose or line containing pressure; it may whip. Never remove a component or plug unless you are certain all system pressure has been depleted. Use only genuine Bendix ® replacement parts, components and kits. Replacement hardware, tubing, hose, fittings, etc. must be of equivalent size, type and strength as original equipment and be designed specifically for such applications and systems. Components with stripped threads or damaged parts should be replaced rather than repaired. Do not attempt repairs requiring machining or welding unless specifically stated and approved by the vehicle and component manufacturer. Prior to returning the vehicle to service, make certain all components and systems are restored to their proper operating condition. [. . . ] Consult the vehicle manual for specifications. Install an accurate gauge in the common control and supply line; install another gauge in the delivery line. Gradually increase air pressure to the common supply and control line. Note when pressure is first registered on the delivery line gauge and record the common control and supply pressure at that point. [. . . ]