12
simple 1/4-turn ball valve can be installed.
The on and off times are determined by timing the discharge; when the discharge is just above the
minimum rate required, a vibration shock is necessary to keep material moving. For effective, efficient
operation, a short cycle of vibration is best (between 5 and 30 seconds for each 1 to 5 minutes of
discharge).
▪
PLUMBING THE VIBRATOR
NOTE: Syntron Pneumatic Turbine Vibrators do not require a lubricated air supply. If the
vibrator is connected to a lubricated air supply, a filter must be installed to remove the
oil.
An air filter is recommended to prolong the life of any pneumatic vibrator. A dirty or moist air supply will
harm the unit and prevent it from operating at maximum efficiency and lowest energy consumption.
SMH recommends a 40-micron filter, maintained per the manufacturer's instructions as often as
conditions (dirt, moisture, oil) dictate.
A flow control valve is recommended to permit tuning of the vibrator to achieve the force necessary to
stimulate material flow. The flow volume determines the force and frequency of the vibrator. By
throttling the flow, the desired material discharge rate can be found, and the natural frequency of the
bin or hopper can be avoided. Avoid speeds (frequency) at which the bin wall and vibrator shake
violently. If this occurs, adjust the speed to smooth out unnecessary vibration. On TAM and TBM
models, the flow control valve can be on the exhaust side of the vibrator.
Quick-opening valves (1/4-turn ball) are recommended between the air regulator and the vibrator so
that the air enters the vibrator with full starting force even at low regulator valve settings. The only
requirement is that the air regulator be installed at some distance from the quick opening valve so that
the air pressure between the two valves can build up enough to yield the necessary starting force. The
regulator should be adjusted to just less than the lowest air line pressure (not to exceed maximum
pressure shown on pages 14, 16, and 18) to assure uniform vibration performance.
Solenoid (quick-opening) valves are recommended for automatic operations. For automatic timed
cycling, connect the timer directly to the bin or hopper gate switch (refer to
Figure 6
). When the gate is
opened, the timed cycling system is activated.
AUTOMATIC TIMED CYCLING OPERATIONS
FIGURE 6
