Our Model 461-57S and Model 441-57S medium pressure regulators are spring-operated regulators that incorporate a “roll-out” diaphragm, similar to the performance found in pilot-operated regulators.
The action of the roll-out diaphragm reduces “droop” (the fall off in outlet pressure as a spring regulator opens to increase flow). This makes the regulators’ exceptional performance possible. By offering near-pilot-operated regulator performance without a pilot, the 57S-series regulators offer simplicity, dependability and exceptionally fast response.
Both models are perfect for most intermediate and large-capacity applications:
These workhorses of the industry have been recognized for their dependable service for nearly 70 years.
For body types, maximum body working pressures, spring ranges, maximum inlet pressures and more, download the data sheet.