D05T COMPACT DESIGN PRESSURE REGULATING VALVES
7
62-3021—03
OPERATION
The Honeywell Braukmann D05T is a balanced, direct acting
pressure regulating valve. The D05T 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 D05T automatically
regulates to maintain the downstream pressure. See Fig. 5 for
the internal construction of the D05T.
Fig. 5. Internal construction of D05T.
TROUBLESHOOTING
Table 3 provides a troubleshooting guide for the D05T Pressure Regulating Valves.
Table 3. Troubleshooting the D05T Pressure Regulating Valves.
D05T Parts and Accessories
Order Number
Description
Replacement Parts
203223
Bonnet Assembly for 3/4 in. Valves.
203224
Bonnet Assembly for 1 in. Valves.
272841
Gasket for 3/4 in. D05T/DS05 (quantity
24).
272842
Gasket for 1 in. D05T/DS05 (quantity 24).
K05A1009
Replacement Cartridge, Screen and O-ring
for 3/4 in. Valves.
K05A1017
Replacement Cartridge, Screen and O-ring
for 1 in. Valves.
K05B1007
Replacement Screen and O-ring for 3/4 in.
Valves.
K05B1015
Replacement Screen and O-ring for 1 in.
Valves.
Union Kits
K06U1077
Union Kit—3/4 in., includes nut, female
NPT threaded tailpiece and gasket.
K06U1085
Union Kit—1 in., includes nut, female NPT
threaded tailpiece and gasket.
K06U1101
Union Kit—3/4 in., includes nut, sweat
tailpiece and gasket.
K06U1119
Union Kit—1 in., includes nut, sweat
tailpiece and gasket.
M32172
INLET OUTLET
Problem
Solution
Whistling noise.
•
Slightly increase or decrease the outlet pressure until the noise disappears.
Will not hold pressure.
•
Clean the filter cartridge.
Chatters.
•
Replace the screen and O-rings.
•
Replace the cartridge (see replacing the cartridge section).
Freezes up.
•
Replace bonnet or cartridge, if damaged.
•
To avoid future freeze-up:
— Temporarily (slightly) open a downstream faucet if the DS05 is going to be
exposed to temperatures below 32°F (0°C). The slight water flow will eliminate
freeze-up.
— Move the DS05 to a location with an ambient temperature above 32°F (0°C) if it
is currently exposed to prolonged temperatures below 32°F (0°C).
Pressure gauge measures a lower
pressure under flow conditions than was
originally set during static conditions.
•
DS05 is functioning properly. No action is necessary. The pressure decrease is
characteristic of all directacting pressure regulating valves and is referred to as
falloff (See Table 2).