One of the most striking improvements 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 critical pilot gas is controlled by a pilot pressure regulator, ensuring the stability of the dome outlet pressure. Thanks to this design modification, the user can rely on stable conditions in the gas supply, even when the flow rates are particularly high or low.
Depending on the gas, the Dome is rated for up to 300 bar / 4350 psi inlet pressure and delivers stable pressures as required between 2 to 50 bar / 29 to 725 psi at its 1" outlet. Multiple gas supplies can also be centrally controlled by means of a common pilot gas pressure. New materials for seals, diaphragms and screw connections also guarantee better weather resistance for outdoor installations. The temperature range now spans -30 to 50°C / -22 to 112°F.
A major advantage of WITT dome-loaded pressure regulators is their easy and flexible use. 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.