The ADCA series PRV57 is an indirect acting pressure reducing valve (pilot operated) pressure reducing valve developed to provide sensitive and accurate control even with fluctuating inlet pressure or flow rate. Designed for industrial use in pressure reducing stations, this regulator features a robust construction and is equipped with a hardened stainless steel valve and external piston and spindle guide. It is suitable for use with compressed air, steam, nitrogen and gases that do not affect the construction, with the exclusion of oxygen. Usage for applications with other gases possibly on request. The ADCA series PRV57 can also be used in situations where so-called 'Dead-end' conditions occur or may occur.