62-3028—4
6
D05 PRESSURE REGULATING VALVES
OPERATION
The Honeywell Braukmann D05 is a balanced, direct
acting pressure regulating valve. The D05 provides
constant downstream pressure regardless of varying
inlet pressures and downstream flow demands.
The spring force holds the valve in the open position until
downstream pressure, sensed by a port, is sufficient to
press on the underside of the diaphragm and close the
valve. As downstream pressure drops due to demand,
the force on the diaphragm is reduced and the valve
opens. Adjustment is made by manually turning the
adjustment screw clockwise to increase the spring
force and require a higher downstream pressure to close
the valve. Similarly, reducing the spring force lowers the
outlet set pressure.
Once the outlet pressure is set, the D05 regulates to
maintain that pressure downstream. See Fig. 4 for the
internal construction of the D05.
Cleaning the Cartridge Screen
To clean the cartridge screen:
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Shut off the supply valve and open a downstream
faucet to relieve the system pressure.
CAUTION
To prevent injury and/or equipment damage,
loosen locknut and turn adjusting screw
counterclockwise
to remove spring tension.
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Loosen locknut and turn adjusting screw
counterclockwise to remove spring tension.
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Remove the bonnet and washer using an
adjustable wrench, socket, or box-end wrench.
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Remove the cartridge using two screwdrivers as
levers as shown in Fig. 3.
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Remove and clean the cartridge screen.
NOTE:
D05G models can be cleaned partially by
removing the gauge tap plug and using
an air hose to blow air into the unit.
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Replace the cartridge screen and make sure the
O-rings are installed properly.
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Carefully clean the cartridge seat area.
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Insert the cartridge. Do not scratch the sides.
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Place the washer on top of the cartridge.
NOTE:
The inner lip must be pointing up to avoid
damaging the diaphragm.
쐅
Replace the spring, spring cup and bonnet (see
Fig. 3).
쐈
Readjust the outlet pressure to the desired setting
by using the procedure described in Changing the
Outlet Pressure section.
M763
INLET OUTLET
Fig. 4. Internal construction of the D05.