
Model 415C & 415 SGS Instruction Manual
D01669102
April 2019, Revision A
13
5
Hydraulic, Pneumatic, Cooling and Electronic Controls
5.1 Hydraulic Pressure Controls
This section consists of the pressure gauge and the pressure release valve.
Components that make up this section are used to control the flow of oil used to
pressurize the cylinder and to display the cylinder pressure. The pressure gauge is
used to display the pressure inside the pressure vessel.
The pressure release valve is used to release pressure from the pressurized cylinder
and discharges waste oil into a small plastic reservoir cup. The pressure release
valve must also be fully opened to release pressure from the cylinder but should
always be opened as slowly as possible the prevent cement spillage into oil lines.
The part number for the pressure release valve is C-1302. This valve should remain
closed while testing and should be opened following the test procedure to vent
pressure from the slurry vessel.
Use caution when opening this valve when the slurry is still very
hot (>150ºF).
Opening the valve will cause oil and possibly cement to vent from the pressure
vessel into a supplied plastic container on the back of the instrument. If the test
pressure is exceedingly high, then slowly open the valve to release pressure to a
more suitable level taking caution not to remove all pressure especially at high
temperatures.
5.2
Pneumatic Controls
The pneumatic section consists of the air pressure REGULATOR and the PUMP
switch. The components in this section are used to power the air driven hydraulic
pump that applies pressure to the sample.
The air pressure REGULATOR is used to control the air pressure to the air driven
hydraulic pump. To adjust the pressure of the air supplied to the pump, pull the
knob on the regulator out to unlock it. Turn the regulator knob clockwise to
increase the pressure and counterclockwise to decrease the pressure. When the
adjustment is finished, push the knob in to lock it in place if desired.