Witt 737 LE-HD/S dome-loaded pressure regulator

The Witt 737 LE-HD/S dome-loaded pressure regulator for high-pressure applications allows constant gas pressure to be achieved irrespective of varying flow rates and upstream pressures.

One improvement is the integration of the previously separate pilot pressure regulator. In contrast to spring-loaded pressure regulators, dome-loaded pressure regulators are operated by gas pressure. This so-called pilot gas is controlled by a pilot pressure regulator. This design modification ensures the stability of the dome outlet pressure so that the user can rely on stable conditions in the gas supply, even when the flow rates are particularly high or particularly low.

Depending on the gas, the dome is rated for up to 300 bar inlet pressure and at its 1″ outlet delivers stable pressures as required between 2 and 50 bar. Multiple gas supplies can also be centrally controlled by means of a common pilot gas pressure. Improved materials for seals, diaphragms and screw connections ensure better weather resistance for outdoor installations. The operating temperature range now spans -30°C to +50°C.

The integrated pilot pressure regulator can be used to increase or reduce gas pressure as soon as another operating pressure is required. The pilot pressure regulator operates with either the process gas or a secondary gas source.

The 737LE-HD/S can be used as a pressure controller for nearly all gases and is available in either brass or stainless steel. It is delivered as a fully assembled and tested unit, including inlet and outlet pressure gauges. Various connection options are available.