The Spirax Sarco® 25-Series regulators are a versatile family of self-acting pressure regulators with control pilots and interchangeable main valves for most steam applications. Options include pressure reduction (25P), combined pressure reduction with electrical on/off override (25PE), pressure reduction with air loaded pilot (25PA), and as a back pressure regulator (25BP). Designed with the user in mind, the 25-Series offers versatility and simplicity. Color coded, interchangeable springs allow quick and easy change of downstream pressure range eliminating the need to isolate the valve or break the steam line.