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Konus Burners, Primary, and Vat Pumps

When the stem moves from the operator toward the valve, the valve
is shifting closed. The stem will move out toward the pilot operator
when in the open position. No. 2WV is a normally closed, two
position, two way, air piloted, spring return, directional valve.

3WV Directional Valve

This valve is primarily used to control the heat of the log ponds. A
temperature probe in the ponds will indicate the heat to the machine
controller. The valve is controlled by the AV1 and AV2 air piloted
valves. In the emergency mode of operation, the two valve solenoids
are de-energized, which directs air pressure in the diaphragm to the
atmosphere. The spring will then shift the valve stem downwards,
allowing the total volume out of the ponds heat exchanger to flow

Page 16 Troubleshooting Thermal Oil Systems