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D06G PRESSURE REGULATING VALVE
OPERATION
The Honeywell Braukmann D06G Valve is a balanced, direct
acting pressure-regulating valve. It 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
TROUBLESHOOTING
Table 2 is a troubleshooting guide for the D06G Pressure Regulating Valves.
Problem
Will not hold pressure or pressure
gradually rises.
Frozen.
Pressure gauge measures a lower
pressure under flow conditions than
set pressure at no flow.
Low capacity, low outlet pressure.
62-3051
Table 2. Troubleshooting D06G Pressure Regulating Valves.
Probable Cause
a)
Thermal expansion.
b)
Debris on valve seat.
c)
Damaged valve seat.
a)
Valve exposed to freezing
temperatures below 32°F (0 °C).
a)
This is normal and characteristic of
direct-acting pressure-reducing valves.
a)
Screen blocked with debris.
b)
Valve undersized.
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 knob 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.
When the outlet pressure is set, the D06G automatically
regulates to maintain the downstream pressure.
a)
Install a thermal expansion tank to
limit pressure rise.
b)
Clean valve.
c)
Replace cartridge.
a)
Inspect and replace any damaged
components. Move valve to a location
that remains above freezing.
a)
No action.
a)
Clean screen.
b)
Check capacity versus requirements
and increase valve size.
6
Solution
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