Spring loaded section overview0 pages

IVP REGULATORS
Spring loaded section overview
Regulators
Function
Pressure regulators (reducers or controllers)
control the outlet pressure over a range of
varying inlet pressures and flows. Regulators
are sometimes called “Forward Regulators” to
limit confusion with Back Pressure Maintaining
Valves.
Spring Loaded Regulators
How does it work
We can divide the valve into three modules
of construction.
• Control Module
• Sensing Module
• Metering Module
Control Module
With Spring Loaded Regulators the down
stream pressure is set by increasing or
decreasing the spring load via hand wheel
(control knob).
Sensing Module
The sensing module compares the down
stream pressure on one side of the module
to the applied reference load on the other. By
matching the forces generated on each face,
it provides the mechanical link to open and
close the valve. Thompson Valves use two
approaches, they are
• Diaphragm–rubber (elastomer)
• Metal Piston–plastic, metal
Diaphragm sensing used in spring loaded
regulators is used only for lower down stream
pressures. Piston sensing is used only in high
down stream pressure application.
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