Description
Watson McDaniel PDP Series — Differential Pressure Pilots for HD Regulators
The PDP Series Differential Pressure Pilots are designed for use with Watson McDaniel HD Regulators to maintain a constant differential pressure between two points in a steam system. Ideal for applications requiring stable flow control and consistent pressure differential.
Product Overview
The PDP Pilot senses pressure on both the inlet and outlet sides of the main valve and automatically adjusts to maintain the desired pressure difference. It is factory-calibrated for accuracy and dependable operation under varying load conditions.
Available Models
- PDP Series — Differential Pressure Pilot for HD Regulators
- Typical pressure differential ranges: 3–25, 20–100, and 80–200 PSIG
- Spring colors: Yellow, Blue, and Red corresponding to range
Compatibility
Designed exclusively for Watson McDaniel HD Regulators used in differential pressure control service. Also suitable for replacement of equivalent Spence and Spirax Sarco differential pilots when specified.
Installation Notes
- Install and calibrate by qualified technicians only
- Verify pressure connections and pilot orientation before operation
- Confirm model code, pressure range, and spring color prior to ordering
Note: This pilot is an accessory for HD Regulators and is not a standalone control valve.