HD Series Pilot-Operated Regulating Valves
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CONTROL PILOTS
Pilot Mounting
Standard pilot mounting is on the right side of the regulator when looking into the outlet port (See diagrams on opposite page which are all right mounted). For opposite mounting, please specify when ordering. Pilot mounting on HD regulators are field reversible.
Pressure
When controlling pressure there are several options you can use for a pilot. The P-Pilot and the P5-Pilot are both spring adjusted pressure pilots. The P-Pilot is used on typical general-purpose pressure reducing applications. The P5-Pilot is used when added accuracy is required. The P5 is capable of maintaining a control pressure window of less then 1 psi. The A-Pilot is air controlled and generally used when adjustment of the regulator and pressure reducing station is done remotely.
Temperature
The T-Pilot is used to control temperature. The T-Pilot is filled with a temperature sensitive liquid, which expands when heated. The expansion of this liquid actuates a bellows that controls the temperature-regulating valve. The T-Pilot is equipped with an overheat bellows that protects the pilot in case of an over temperature condition. The T-Pilot controls temperature through a range from 60-260°F.