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Armstrong pressure-reducing valves (PRVs)
and temperature regulators help you manage steam, air and liquid
systems safely and efficiently. And they ensure uninterrupted
productivity—by maintaining constant pressure or temperature for
process control.
Steam, liquids and gases usually flow at
high pressure to the points of use. At these points, a
pressure-reducing valve lowers the pressure for safety and
efficiency, and to match the requirements of the application.
There are three types of PRVs.
- Direct-Acting. The
direct-acting type operates with either a flat diaphragm or
convoluted bellows. Completely self-contained, it does not
need an external sensing line downstream to operate.
- Internally Piloted
Piston-Operated. This type incorporates a pilot and
main valve in one unit. The pilot valve has a design similar
to the direct-acting valve. The discharge from the pilot
valve acts on top of the piston, which opens the main valve.
- Externally Piloted.
In this type, double diaphragms replace the piston operator
of the internally piloted design. This increased diaphragm
area can open a larger main valve, allowing a greater
capacity per line size than the internally piloted valve.
Designed for steam, water and non-corrosive
liquid service, Armstrong self-actuated temperature regulators
are compact, high-performance units. They operate simply and are
therefore suitable for a wide variety of applications. Flexible
mounting positions for the sensor, interchangeable capillaries
and varied temperature ranges make installation, adjustment and
maintenance quick and easy.
Armstrong offers a full line of pressure
and temperature controls for steam, air and liquids, as well
condensate coolers and drain separators.
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