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THERMOSTATIC VALVE:
A shower mixing valve
with automatic temperature control. When temperature
fluctuations occur at the water inlets, a thermal
actuator adjusts the hot and cold ratio to maintain the
original temperature setting. A thermostatic mixing
valve (TMV) is a valve that blends hot water with cold
water to ensure constant, safe shower and bath outlet
temperatures, preventing scalding. |
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PRESSURE-BALANCED VALVE:
required by building codes in some municipalities,
provides water at nearly constant temperature to a
shower or bathtub, despite pressure fluctuations in
either the hot or cold supply lines. The
pressure-balanced shower valve compensates for changes
in water pressure. It has a diaphragm or piston inside
that reacts to relative changes in either hot or cold
water pressure to maintain balanced pressure. As water
pressure drops on one supply line, the valve reduces the
pressure in the other supply line to match. A side
effect of this is that the pressure and flow at the
shower head or tub spigot will drop twice as much as if
only one supply line had been affected, but without a
large temperature change. |
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