Forney HA-0619 User manual

Forney Instruction Manual | MN-FL.21.1 Manual Valve Control
INSTRUCTION MANUAL
MANUAL VALVE CONTROL
MATERIAL TESTING MACHINE
MN-FL.21.1

Forney Instruction Manual | MN-FL.21.1 Manual Valve Control
CONTENTS
Safety Warnings ........................................................................................................................ 3
Sequence of Operation ............................................................................................................. 4
Functions of the Control Valve ................................................................................................. 5

Forney Instruction Manual | MN-FL.21.1 Manual Valve Control
3
WARNINGS / CAUTIONS
ONLY QUALIFIED PERSONNEL MAY OPERATE EQUIPMENT TAKING NOTE
OF THE FOLLOWING
MOVING PARTS CAN CRUSH AND CUT – Keep hands clear of moving parts
while operating machinery!
WEAR SAFETY GLASSES WHILE OPERATING EQUIPMENT – Always wear
safety glasses while operating machinery!

Forney Instruction Manual | MN-FL.21.1 Manual Valve Control
4
SEQUENCE OF OPERATIONS
Machines Equipped with Manual Control Value
NOTE: Only qualified personnel should operate FORNEY machinery taking pre-cautions that
moving parts that can crush and cut!
1. Select and install any breaking heads and spacers as needed for test type. Typical
maximum piston travel is 2.5”, do not exceed maximum travel!
2. Place valve in the retract or hold position.
3. Turn on electric pump. If starting cold, let unit warm up for 10-15 minutes.
4. Carefully center specimen in machine. Use “Metered” and “Full Advance” valve
positions as needed to advance piston and seat breaking head on specimen per test
type requirements. Zero any load readouts just before applying load to specimen.
5. Position valve (control handle No. 1) to the “Metered Advance” position. It is normal for
the valve to take a little time to fill with fluid and resume loading when switching to this
position.
6. Adjust the metering knob to the desired loading rate. To increase the rate of loading,
turn Control Knob No 2 counterclockwise. To decrease the rate of loading, turn Control
Knob No. 2 clockwise.
7. If a fast preload is desired, position the valve to “Full Advance”.
8. Watch the load monitor closely and when the desired preload has been attained, move
the valve back to the “Metered Advance” position.
9. To hold pressure at any desired point, position the valve to the “Hold” position. Note
that the hold is not leakage free and the system will bleed some pressure back to tank
while in the hold position.
10. To release pressure so that the piston will return after a test has been completed,
position the valve to the “Retract” position.

Forney Instruction Manual | MN-FL.21.1 Manual Valve Control
5
FUNCTIONS OF THE HA-0619 CONTROL VALVE
(REFER TO FIG. 1)
Metered Advanced Position
This position of the Control Handle No. 1 allows
the operator to adjust the rate of loading. Using
Control Knob No. 2 as the adjustment, turn the
control knob clockwise for a decrease and
counterclockwise for an increase in the rate of
load.
Full Advance Position of Control Handle
No. 1
This places the machine in a rapid advance, non-
controlled rate. This is used primarily for setting a
pre-load or positioning the crosshead.
Hold Position of Control Handle No. 1
This position holds the pressure. It is normal for some pressure to bleed to tank when in the
hold position.
Control Knob No. 2
With valve Control Handle No. 1 in the metered advance position, this knob allows the operator
to control the loading rate. Turn the control knob clockwise for a decrease and
counterclockwise for an increase in the rate of load.

Forney Instruction Manual | MN-FL.21.1 Manual Valve Control
6
Retract Position of Control Handle No. 1
This position directs all ports back to the reservoir, releasing pressure, and allowing the piston
to retract.
Note: During operation, the flow control valve will go through a significant temperature rise.
Do not be alarmed, as this rise will not affect the operation of the testing machine.