HD Series Pilot Operated Regulating Valves
Watson McDaniel Steam Products

HD Series Pilot Operated Regulating Valves

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The HD Series Pilot Operated Regulating Valves was designed for extremely accurate control of temperature and pressure in steam service applications. The HD-Series is made of Ductile Iron for extended pressure and temperature ratings when compared to cast iron. Several different control pilots can be mounted to the valve to control pressure, temperature, or a combination of both. When two or more pilots are used together (both a pressure and a temperature pilot) an additional pilot adapter for the second pilot is required.

  • No external power source is required.
  • Pressure & temperature pilots can be used in combination, eliminating the need for a separate pressure and temperature regulator.
  • Ductile iron body for higher pressure ranges and increased safety when compared to cast iron.
  • Full port strainer and blowdown valve on pilot adapter for ultimate protection against dirt and scale.
  • Hardened stainless steel trim (55 Rc) for extended life even in the most demanding applications.
  • The innovative design allows the pilot to be mounted on either side of the regulator and is easily field-reversible without having to rebend tubing.
  • Tubing and pilot adapter is pre-mounted on main valve. The control pilot requires only four bolts to complete the installation.
  • Many sizes and styles available – Call Apex for more information

Catalog Specification Sheet

I&M – Quick Install

I&M – Complete Valve Guide with Solenoid Pilot

I&M – Complete Valve Guide with Air Pilot

I&M – Complete Valve Guide with PTL & PTR Pilots

I&M – Complete Valve Guide with PTRP Pilots

I&M – Complete Valve Guide with PTs Pilots

I&M – Complete Valve Guide with PP & PP5 Pilots

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Description

The most common pilots are the PP-Pilot for pressure reducing, and the PT-Pilot for temperature control.

  • The Standard Main Valve is used for an inlet steam  pressure range of 15-300 PSI.
  • The Low-pressure Main Valve contains a different main valve spring and is available for an inlet  pressure range of 5 – 20 PSI. The Main Valve and Pilot are purchased separately.

HD Series Pilot Operated Regulating Valves Options:

  • HDR – Reduced Port Valves
  • SSD – Stainless Steel Diaphragm
  • SSXT – Stainless Steel External Tubing
  • BADAPTER – Required when 2 or more pilots are sued on the same valve (not required for solenoid pilot)

Application Data Sheet – Fill Out and Return for Accurate Quote