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13-21-615 v01 Page 34
301EBD797-00
(Ref. Drawing)
FIGURE 4-2 SCHEMATIC TUBING DIAGRAM
Blowdown Valve
(
Figure 4-2
) This valve normally is used for control functions, but also serves to relieve
reservoir pressure following a shutdown. The blowdown valve is a two-way solenoid valve which is piped
into the oil reservoir outlet ahead of the minimum pressure valve. When the solenoid is de-energized, the
valve opens and the coolant system is blown down. When the solenoid is energized, the valve closes to
allow the coolant system to pressurize. A control air check valve is provided to ensure that the inlet valve
is closed during blowdown.
Operation of the unit with improper relief valve setting can result in severe
personal injury or machine damage. Ensure properly set valves are installed and
maintained.