Meyer C Series, Руководство пользователя, Страница: 3 / 20

14
ELECTRO-MECHANICAL ACTUATION STARTUP
Once all of the electromechanical components have been installed and wired and the Double
Flapgate Valve is properly and safely attached to the upstream and downstream equipment ( See
“HAZARD IDENTIFICATION” section) including all access doors being securely closed, the valve may be
test-cycled and set up for regular operation. The Double Flapgate Valve cycling rate has been factory
set and does not have any adjustments (unless a variable speed drive is controlling the motor, which is
not covered in this Manual).
Start the electric motor and observe the operation of the valves.
The motor is coupled to a gear reducer driving a cam assembly at a constant speed (normally 6 RPM).
As the cam turns, it contacts the upper and lower cam follower rollers. The cam contacts and pushes
on either the upper or lower cam followers, opening and closing the upper and lower gates
sequentially. These mechanical settings are factory set and should not require adjustment. If they
loosen for some reason, the slots and hold-down bolts in the cam arms can be repositioned and
retightened to position the cam arms for correct rotation.
The counterweights keep the cam followers riding on the cam by applying downward pressure. To
adjust the amount of force acting on the cam, the counterweights can be moved axially along the
length of each arm by loosening the nuts on the counterweight arms, moving the weight on the arm
and then re-tightening the nuts. To increase the force, move the counterweight away from the gate
shaft.
When the unit is operating satisfactorily, it can begin handling material. Continue to observe the
operation and make adjustments if needed.
Follow proper Lockout/Tagout procedures before making adjustments; failure to do
so could lead to serious injury or death.
GRAVITY ACTUATION STARTUP
Once all of the gravity control components have been installed and the Double Flapgate Valve is
properly and safely attached to the upstream and downstream equipment (See “HAZARD
IDENTIFICATION” section) including all access doors being securely closed, the valve may be test-
cycled and set up for regular operation. The Double Flapgate Valve has been factory set, however, the
following adjustments may be made:
The weight of the processed material on the upper and lower gates increases as the material is
introduced from above. When the combined weight of the material and the gate exceeds the force
provided by the external counterweight and any pressure differential, the gate opens and once the
material slides off the gate, the counterweight acts to re-close the gate, thereby creating a gravity-
driven open and closed cycle of each gate.
To counterbalance the action of the weight of the upper and lower gates, counterweight assemblies
are provided on the top and bottom on either side of each valve. To adjust the amount of force acting
to balance the material and gate loading, the counterweights can be moved axially along the length of
each arm by loosening the nuts on the counterweight arms, moving the weight on the arm and then
re-tightening the nuts. To increase the force, move the counterweight away from the gate shaft. By
moving the counterweights outward, more material will be required to force the gate open;
decreasing the number of cycles per minute. Moving the weights inward will have the opposite effect.
3
SIGNAL WORD DEFINITIONS
Indicates a hazardous situation which, if not avoided, will result in death or serious
injury.
Indicates a hazardous situation which, if not avoided, could result in death or
serious injury.
Indicates a hazardous situation which, if not avoided, could result in minor or
moderate injury.
Indicates information that is important, which if not followed, may cause damage to
the equipment.
IMPORTANT SAFETY INFORMATION
To reduce the risk of serious injury or death:
Be qualified.
Operation of this equipment must be limited to those that are properly trained in its use.
Servicing or maintaining this equipment must be performed by trained maintenance personnel only.
Read all safety information.
• Read and understand all the
safety-related information contained in this manual
prior to
attempting to perform any work on this equipment.
•
Obey all the safety labels on the equipment. Do not remove any safety labels. If the equipment
is missing any labels (see “SAFETY LABELING” section), contact the Factory immediately, before
putting the equipment into service.
•
For add on equipment ; motor, switches, etc. refer to the appropriate manufacturer’s safety
information.
Heavy – handle safely . The weight of this equipment and its component parts could cause serious
injury if dropped or mishandled during installation, service, or maintenance. Always use safe
handling and rigging methods.
Guard and avoid dangerous internal parts . The internals of this equipment contains moving part(s)
that will crush and cut any body parts they come in contact with, resulting in serious injury or death.
• Equipment can be actuated remotely, without warning, if energized.
•
Inlet and outlet flanges must always be permanently fastened to mating system
components or permanently guarded. Components and guards must be designed such that
no access to the interior of the equipment is allowed during operation. See “HAZARD
IDENTIFICATION” for process integration and installation details.
• Never open access covers/doors or reach inside
the equipment for any reason while it is in
operation.