Regulators are simple, cost-effective valves used for:
• Reducing Pressure (PRV)
• Controlling Temperature
• Controlling Back Pressure

Unlike control valves, regulators are self-powered, which means they do not require any outside source of power such as air pressure or electric actuators to operate.

HD / HSP Series


403 Series

455 Series

Pressure Regulating Valves

Pressure Regulating Valves (PRVs) play a crucial role in transporting steam, liquids, and other gases. These substances typically travel through piping systems at higher pressures than needed for their end use. PRVs reduce this pressure to an appropriate level for the final application.

HD Series – Pilot Operated

1/2” – 6”  Ductile Iron Body

This series is your go-to choice for pressure reduction or temperature control in steam applications, offering a variety of pilots for different needs.

With various pilots available, it adapts to your unique needs, whether that’s reducing pressure, controlling temperature, or other applications.


1-2″ – 2″ | Ductile Iron or Stainless steel Body

The O-Series is a simple and economical choice for reducing pressure across a variety of fluids including steam, water, air and other liquids and gases. Limited capacity when compared to the HD-Series.

455 Series

1/2” – 4” | Bronze / Cast Iron Body

The 455 Series is ideal for reducing pressure on Steam & Air applications. External pressure sensing connection required.

403 Series

1/2” – 4” | Ductile Iron Body

The 403 Series are pilot-operated, piston-actuated regulators, primarily used for reducing pressure in steam systems.  Optional internal sensing line available to simplify installation. Compact size.

Temperature Regulating Valves

Temperature Regulating Valves, also known as TRVs, are like the unsung heroes of many processes and systems. They might not be the flashiest components, but they play a critical role in maintaining optimal temperature conditions.

Here’s how they work: a typical TRV has a temperature probe, often referred to as a “bulb,” that’s connected to a bellows in the valve or pilot actuator by a length of capillary tubing. When the bulb is heated, the liquid inside expands, causing the bellows to close off the valve or pilot. This action controls the fluid flow—usually steam or water—thereby maintaining the system or process temperature.

Regulating Valves for Heating Applications


Regulating Valves for Cooling Applications

Back Pressure & Relief Regulators

Relief valves, also known as back-pressure valves, maintain specific back pressure levels or protect systems from over-pressure conditions. These small but mighty components are essential for the smooth operation and safety of various systems.

In the realm of steam applications, we have the PBP Back-Pressure Pilot. This device works in tandem with HD Regulators to maintain upstream pressures. When the upstream pressure reaches the pilot set point, the regulator opens. This combination is often used to supply steam to low-pressure mains, ensuring a constant back-pressure on the inlet side of the regulator. However, it’s important to note that it should not be used in place of a safety relief valve.


Steam Audit

Full Steam Trap Survey & System Audit

Plugged, leaking, or blowing steam traps can cost thousands of dollars in lost energy every year. Detect any waste of energy, efficiency, and dollars with a steam trap survey from Cooney Coil & Energy

Available in Philadelphia, Pennsylvania, New Jersey, and Delaware.

American-Made Steam traps

Distributor of Watson McDaniel Regulating Valves

At Cooney Coil & Energy, we’re the go-to provider for industries in Philadelphia and the tri-state area seeking reliable steam solutions like Watson McDaniel regulating valves and steam traps. Our commitment to quality and customer service has earned us an excellent reputation in Pennsylvania, New Jersey, and Delaware as trusted distributors of Watson McDaniel steam specialties.


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