Hale Trailer - Manual (Page 31)

31 Accessories / Options - Skid & Trailer
p/n: 209-0020-101-0
A cc es so r ie s / O p tio ns
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Thermal Relief Valves (TRV)
Thermal Relief Valves (TRV) protect the pump from overheating and are
mounted in the pump discharge. (See Figure 2a-7: “Thermal Relief Valve,
TRV.”) The valve monitors the water temperature in the pump. When tem-
peratures exceed 120° F (49° C), the valve automatically OPENS. When
the temperature returns to a safe level, the valve CLOSES.
Figure 2a-7: Thermal Relief Valve, TRV
A 3/8” OD (10 mm) tube is directed to the ground to discharge small
amounts of cooling water away from the operator.