Spirax Sarco DRV7 and DRV7G Pressure Reducing Valves

The DRV7 is an SG iron direct acting bellows sealed pressure reducing valve. The standard version has an EPDM diaphragm and is
suitable for steam, water and air applications. The DRV7 is available with a Nitrile rubber diaphragm (suffix ‘N’) for oil applications.
A Nitrile rubber soft seated version (suffix ‘G’, limited to 90 °C) is also available for applications that require tight shut-off. It is
recommended that for these applications a maximum pressure turndown ratio of 10:1 is observed.
Note: To protect the actuator diaphragm on steam applications a WS4 water seal pot must be installed in the downstream pressure
signal line to the actuator. Refer to TI-S12-03 for details.