The HD or D Regulator with the “P” Pressure Pilot is used for reducing steam pressure in piping mains and process applications. Pilot-operated regulators will maintain constant downstream pressure even when the inlet pressure to the regulator fluctuates or steam usage varies. The purpose of the pressure pilot is to control the operation of the pressure regulating valve. A sensing line used to detect pressure connects the pressure pilot to the downstream side of the regulator. The pressure in the sensing line is directed under the diaphragm in the pressure pilot. When the pressure in the system reaches the adjusted spring set point it pushes the diaphragm upwards against the force of the adjusting spring and closes the pilot valve. When the pilot valve is shut, steam can no longer pass through to the underside of the regulator diaphragm and the valve main closes. When the steam pressure falls below it’s set point, the pilot valve opens allowing steam to lift the main diaphragm and open up the regulating valve.
| Watson McDaniel Company | |
|---|---|
| Product Category | Industrial Valves |
| Product Number | 1 1/4" HDP |
| Product Name | Pilot-Operated Pressure Regulating Valve |
| Valve Type | Metal Seated |
| Primary Material | Ductile Iron |
| Media | Steam |
| Valve Size | 1.25 inch (31.75 mm) |
