March 2014
Installation and Maintenance Manual
E-90090005 Rev. A
6
Section 4: Operation
Operation
4�1
Manual Mode
1.
Lift/pull the toggle on the Reset Valve (23) and latch it in the upward position
(pane #1 of Figure 2.
(Three Modes of Reset Valve)).
2.
Stroke the Handpump (3) to pressurize the SCH module and begin applying
pressure to the operator’s Piston (refer to Appendix C
(List of Drawings)
for diagrams of typical rotary and linear operators) to move the valve to its
operational position.
Figure 2
Three Modes of Reset Valve
3.
The resistance of the Handpump (3) to pumping will increase noticeably when
the valve reaches its full operational position. Pump approximately one-half of
additional stroke at this point. The High Pressure Gauge (9) will read above the
minimum operating pressure of the operator, and if so equipped, its needle will
rest in the middle of the green band.
4.
At this point, hydraulic fluid pressure in the SCH module and operator cylinder
opposing the operator spring forces to hold the line valve in position.
NOTE:
Plug the Low Pressure Port (L) if the signal device is not connected to the manifold to
prevent fluid loss from the manifold. Follow the instructions above to operate the unit.
Summary of Contents for Bettis PressureGuard
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