1 ) One-way flow control valve, in-line installation GR Shut-off/flow control valve in sturdy plastic design. Non-return and flow control valve In-line installatio 2 ) One-way flow control valve, M5 compact system GRF Shut-off/flow control valve on adapter plate for mounting frame 2N. Complete system offering control components with all the functions required for pneumatic sequence control For control cabinet installation Fast replacement of components