Operating Manual2018-10-09 15 of 206 M AINTENANCE AND REPAIR6.1 GENERAL INFORMATIONThe SBCoupling consists of two housing halves with a check valve in each. The housings are held togetherby two pressure clamps and a support ring during normal operation. The two check valves support eachother during normal operation and keep the conduit open.Positioning body halves1 Release cable2 Outer support ring3 Pressure clamp4 Coupling flange5 Outer O-ring6 Spring-activated piston7 Piston O-ring8 Body; coupling halves9 Connection flangeIn case the tank wagon rolls away or someone forgot to disconnect the supply line before the truck drives off,the SBC is activated as follows:Before the supply line is stressed by undue external forces the support ring is pulled out by a pull cablerunning parallel to the supply line which releases the pressure clamps. The coupling halves are separatedfrom each other and the spring-loaded check valves instantaneously close both ends of the line. One half ofthe coupling remains firmly connected to the tank wagon while the other half of the coupling re- mainsconnected to the supply line. This prevents the outflow of liquids or gases from both product carrying ends ofthe line.Maintenance tasks, to put the released coupling back into service, may be performed only bytrained personnel from an authorised professional workshop. All measures necessary forinspection, maintenance and repair must be carried out in accordance with the nationalregulations of the country where the system is installed.21 3456789