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Model: 42T
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Figure 1: Installation Drawing
7. Operation
The pressure-regulating pilot senses downstream pressure and modulates the upper control chamber causing the main
valve to throttle, thus maintaining constant downstream pressure. When the downstream pressure falls below the pilot
setting, the pilot opens, pressure in the upper control chamber decreases, and the main valve modulates open to
increase downstream pressure and maintain pilot setting.
If the downstream pressure rises above the pilot setting, the pilot valve closes, pressure in the upper chamber increases
and the main valve throttles close to decrease downstream pressure to the pilot setting.
The pressure-reducing pilot is equipped with an adjusting screw to preset the desired downstream pressure and an
internal factory preset restrictor to control the closing speed.
Starting -up
When performing this procedure refer to figure 2.
7.1
Open a hydrant, relief valve, drain valve, or other flow-consumer downstream of the Bermad 42T “Y” type Pressure-
Reducing Valve, creating a system demand.
