ASCO series 541 542 543 accessories, sandwich pressure regulator module, this module is placed between a subbase and a spool valve, it is designed to regulate the pressure and the port according to: adjustable ppressure 0.5-10bar, G1/8 (A) port on top for pressure gauge connection, locking adjustment knob of pull-turn-push type.
ASCO Joucomatic Product Reference: 34600458