Air System Relief Valves - Walinga Grain-Vac 7614F Operator's Manual

5.2.5 AIR SYSTEM RELIEF VALVES

The air in this system is moved by the blower.
It draws air into the intake side and creates a
vacuum that can pick up and draw the
material into the system. As the air moves
through the blower, it becomes pressurized
and flows through the airlock to move the
material out of the system and to its
destination. As the flow into the intake is
restricted, the vacuum will build until it
exceeds the setting of the intake relief valve.
The valve opens to supply a flow of air to the
blower to prevent overheating. A relief valve
on the pressure side will also open to allow air
flow if the airlock (outlet pressure side of the
circuit) is restricted or plugged.
The vacuum side relief valve is set to open at
16 in. Hg vacuum and the pressure relief valve
at 15 psi. Both must function at very close to
these specified levels to insure optimum
capacity and performance. After prolonged
use, the springs in these valves can weaken
causing the valve to open prematurely and
affect machine performance. Dirt and debris
can get caught in the valve seat allowing air
leakage that affects system performance.
To maintain air system relief valves, follow
this procedure:
1. Listen for the valves opening during
operation. They will sound like a popping or a
whistle if they are opening.
2. Install gauges on the vacuum and pressure
sides of the air system.
7614F Grain-Vac Operator's Manual 34-100853-6
Fig. 5-30 Vacuum Relief Valve.
Fig. 5-31 *Pressure Relief Valve.*(optional)
Pressure Relief Valve only supplied with bin fill kit.
Bin Fill Kit: Part #11-99512-5
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