The Sarasin-RSBD® 71 Series design is based on a thermal expansion spring-loaded body design (9 Series). The Sarasin-RSBD® 71 Series are an engineered, custom-made design that has been industrialized and offers a full nozzle pilot operated pressure relief valve for use in industrial gas service:
The full nozzle option insures body chemical protection
In case of an upgraded process (higher back pressure or higher operating pressure) the customer can change from a spring loaded to pilot operated version, keeping the same center-to-face dimension.
The full nozzle option includes integral wetted components which offer the advantage of removal for maintenance and replacement.