Paragon P858 - Melt Plug Information

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Melt Plug Information
The fast acting melt plug is designed to reduce the blower operating pressure and
temperature when the machine is operated beyond its limits.*
There are two plugs located near the blower flanges. When the blower is operated
beyond its operating range, the following will happen:
Loosen
Left Hand Thread
•
The temperature increases.
•
The solder (Figure 1, Reference # 1) melts.
•
The thin disc (Figure 1, Reference # 2) is released.
•
Pressure drops 4-6 psi at 1800 RPM.
•
Audible sound from the plug alerts the driver of a problem.
•
Operator should shut down blower and try to locate the problem.
•
When the problem is corrected, operator can fit a new plug (left hand
thread) or use the plug from the suction side of the machine.
Note: Replace blown melt plugs immediately to prevent further damage to the
blower. Do not re-install blown melt plugs.
Fig. 1
Caution:
If problem cannot be corrected, do not increase blower speed as this can cause
further damage to the blower. This overheating condition should be reported to
the maintenance department immediately.
*Vacuum applications require a vacuum valve for blower protection.
Caution:
Do NOT operate blower after a melt plug has blown.