Rigsaver is an air shut-off valve that is mounted in the air intake system to stop the airflow from entering the cylinders and positively immobilize the engine, safeguarding personnel and equipment. It can be manually or automatically controlled, responding to a variety of fault or hazard conditions.
The Chalwyn D and D-AM automatic valves are self-contained with flow actuated overspeed shutdown. They require no external electrical or mechanical input devices. The closing force is provided by the intake air flow passing through the valve.
The Chalwyn SVX hazardous area, flameproof series of butterfly air intake shutoff valves are ATEX approved for Zone 1, Gas Group IIB, T4 (135°C) or Zone 21 hazardous area applications.