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Regulating Valves can also be used to relieve over pressure conditions in Liquid systems or to maintain the “Back Pressure” in steam systems. When regulating valves are used in these types of applications they are referred to as Relief or back pressure Valves. Back pressures regulating valves used in steam applications must not to be confused with Safety Relief Valves.

1/2” - 4” • Ductile Iron Body The 403 are pilot-operated, piston-actuated, pressure regulators primarily used for reducing pressure in STEAM systems. Available with an optional internal sensing line which simplifies installation. Piston Operated regulators are more compact in size when compared to typical diaphragm actuated regulators.

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What are Temperature Regulating Valves used for? Temperature regulators can be used to control temperature in various processes and systems. Typical configurations consist of a temperature probe (“bulb”) connected by a length of capillary tubing to a bellows in the valve or pilot actuator. When the temperature bulb is heated, the liquid inside the probe expands the bellows and closes off the valve or pilot. The opening and closing of the valve controls the flow of the fluid (typically steam or water) which maintains system or process temperature.

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

PBP Back-Pressure Pilot The PBP Back-Pressure Pilots are used with HD Regulators to maintain upstream pressures in steam systems. When the upstream pressure reaches the pilot set point, the regulator opens. The HD Regulator with a PBP Back-Pressure Pilot is commonly used to supply steam to low-pressure mains. The PBP Back-Pressure Pilot maintains a constant back-pressure on the inlet side of the regulator. Should not be used in place of a safety relief valve.

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1/2” - 4” • Bronze / Cast Iron Body These are the primary choice for reducing pressure on Water, Air, and other liquid and gas applications. The soft-seated elastomeric Viton disc has an operating temperature up to 300 ºF and provides excellent shut-off characteristics. The balanced seat design eliminates internal forces extending the capability range of both pressure and capacity.

1/2” - 2” • Ductile Iron or Stainless Steel Body Simplest and most economical choice for Pressure Reducing applications for a variety of fluids including Steam, Water, Air, and other liquids and gases. These direct operated regulators have limited capacity compared to the HD-Series pilot operated regulators.

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My laundry shutoff valves are leaking. What size do I need to get? I saw there is a 3/4 and a 1/2 at the hardware store. How do I tell which size this is?

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Back-Pressure and Relief Valves Relief Valves (Back Pressure Valves) are used to maintain a specific back pressure or to protect systems from an over-pressure condition.

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Regulators can also be used to precisely control the flow of steam to accurately heat other liquids such as water flowing in a Heat Exchanger or contained in a Tank or Vat to extremely accurate temperatures. Regulators can also be used to accurately control the flow of water or glycol to cool down a process to a precise value. When regulators are used for any type of temperature control they are referred to as Temperature Regulators Valves or just Temperature Regulators.

1/2” - 6” • Ductile Iron Body Used for pressure reduction or temperature control applications depending on pilot selection. Commonly used for reducing steam pressure to a specific downstream set pressure, other pilots are also available for controlling temperature, back pressure, and other applications.

1/2” - 4” • Bronze / Cast Iron Body For reducing pressure on Steam & Air applications. An external pressure sensing connection is required. The lack of small pilot orifices make the 455 Series less susceptible to dirt and scale. Balanced seat and disc design allows these valves to be used in applications with low inlet pressure down to 5 psig.

The most common application for regulating valves is for reducing the downstream pressure of Steam, Water, as well as other liquids and gases that are flowing thru a pipe or system. When regulators are used for pressure reduction applications they are often referred to as Pressure Regulating Valves or Pressure Reducing Valves or simply PRV’s.

Steam, liquids, and other gases are typically transported through piping systems at relatively higher pressure than ultimately required and therefore need to be reduced to a lower pressure at the final point of use. The purpose of the Pressure Regulating Valve (PRV) is to reduce the pressure of steam, liquid, or gas to a lower pressure appropriate for its final application. Direct operated regulators are typically the most economical and can be a suitable choice particularly in the low to medium flow range. Pilot Operated Regulators, such as the HD-Series will control downstream pressure more accuratly over a wider range of flows.

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.