Handling instructions and Precautions
⓭
●
State of air supply and exhaust
1. State of air supply is that air flows through from 1 (P) port (pri-
mary) side to 2 (A) port (secondary) side and is shut off at the
3 (R) port.
2. State of air exhaust is that air flows through from 2 (A) port
(secondary) side to 3 (R) port and is shut off at 1 (P) port (pri-
mary) side.
●
Switching the state of air supply and exhaust
1. To switch the air flow from supply to exhaust and vice versa,
turn the knob 90° to "SUP", which is shown near the bottom of
the knob, to supply air, or turn the knob 90° to "EXH" to
exhaust air.
●
Using the lock hole
1. The lock hole on the residual pressure exhaust valve is used
to secure the air flow in a state of exhaust and to prevent
changes to the state of the air supply.
2. Check the window shown in the diagram below to see the
state of the residual pressure exhaust valve. If "SUP" is show-
ing, air is being supplied. If "EXH" is showing, air is being
exhausted.
2. The diameter of the lock hole is
φ
0.394 in.
3. A lock must be supplied separately.
3. Turn the knob slowly to gradually supply or exhaust air.
Operation and maintenance inspections
NOTE
Air cannot be supplied while the look hole is used.
NOTE
1(P) port (primary) side air cannot flow to 2 (A) port
(secondary) side and 3 (R) port at the same time.
SUP.
EXH.
Exhausting air
Supplying air
: Supplying air
: Exhausting air
Lock (provided by the customer)
SUP
EXH
