Testing; Function; Pressure Range; Leakage - Aventics CONTROLAIR HC-2 Series Service Information

Testing

After any repair or adjustments, The HC-2 Controlair
Valve should be tested using the following procedures
and test arrangements described in this section.
Pressure control valves need to be tested for the
following

1. Function

2. Pressure Range

3. Directional Output
The adjustments affecting these points were described in
the previous sections.
General instructions for accomplishing this test are listed
below using a 3 way 3 position valves with closed center.
To test the valve for function, pressure range and
directional output if using an AVENTICS "D" Pilotair
Valve place handle in position 1.To test for leakage place
handle in position 2. To remove the valve after these
tests are performed move handle to position 3.
1. Function: The HC-2 Controlair Valve has 2 pressure
regulated airlines. The selection between the pressure
regulated airlines depends on the movement of the
handle to either side of neutral or center position. The
pressure or regulated line output is proportional to the
handle position on either side of the neutral position.
2. Pressure Range: The minimum and maximum
pressure range is generated in delivery lines 1 and 3 and
is specified by the control spring in use. See the
graduated output pressure setting adjustment section.
After the valve is adjusted confirm the minimum and
maximum pressure is generated in delivery lines 1 and 3
by moving the handle from neutral to 10° then to full
travel position both sides of center.
3. Leakage: To test the leakage on HC-2 requires the
following,
1. A zero leak test: Make sure that supply port #2
is at system pressure and moved that handle to
the directional valve is in position #2. This will
isolate the supply in the supply line.
2. At least a 12 cubic Inch volume ( P/N
R434002910) in the supply line prior to the HC
control air supply connection.
3. A vented ball valve to bleed off the supply after
testing.
4. 4" gage in the supply line between the non-
vented valve, volume and supply port on the HC
-2.
Set the supply pressure to 20 psi (1.4 Bar) above the
spring range of the valve. Using a soap and water
solution, coat the valve at the pipe bracket #1 and the
spring housing # 32 parting line. No leakage is permitted
in any handle position.
Testing and Test Set-Up

4. Leakage

5. Mechanical Detents

Page 11
A. Port 8 is plugged.
B. Ports 1 and 3: For valves with a spring range of less
than 90 psi, set the supply line pressure to at least
100 psi. Move the handle in either direction to the full
travel position and hold . Then close the supply line
to port #2 or delivery line to isolate the graduating
valve. Observe the gage in the delivery line. A
pressure drop of no more than 2 psi in 30 seconds is
permitted.
C. For valves with a spring range of more than 100 psi,
set the supply line pressure to at least 15 psi above
the spring range. Move the handle in either direction
to the full travel position and hold . Then close the
supply line to port #2 (or move the handle of PD-
020031-00191 valve) to the center position to isolate
the graduating valve. Observe the gage in the
delivery line. A drop of no more than 2 psi in 30
seconds is permitted pressure.
D. Shut –off the supply line after testing to vent
downstream lines. Move the handle of the directional
valve to position 3, this will insure supply line 2 is
exhausted. Shut –off the ball valve before the
regulator to insure that that line is also vented
4. Mechanical Detent: (HC-2-LX or SX Models only):
Move the handle to the extreme detented position.
Connect a spring scale just under the knob item #54. The
force required to pull the handle out of the detented
position should be at least 12 lbs. Check the detent hold
in both extreme handle positions.