1. Pneumatic and Hydraulic
Basement of Westin Hotel Atlanta

2. Pneumatic Systems

3. FLR. = Filter Regulator Lubricator
Very important device
Ensure regulator set at 90 PSI
Silo aeration pad supply should be teed off between regulator and lubricator
Replace Filter at regular cycles and ensure bottle is drained.
Top up lubricator on a regular basis. More work = more lube.

4. Important notes
Fix all air leaks on plant.
Seals can be purchased for most cylinders and valves
Leaks cost money
Unnecessary loading on compressor
Inconsistent air pressure causes inconsistent dosing
Silo aeration pad pressure should have its own dry unlubricated supply at 8-12 PSI
Quick exhaust valves used on all dosing gates
Inching valves can be used on discharge gates along with flow regulators
Feed air manifolds from both ends with airline large enough to feed all devices

5. Typical Air manifold

6. Not enough volume to feed manifold due to pipe size

7. Common single acting electrical solenoid valves

8. Flow diagram single 5/2 valve
Flow Restriction
Exhaust Ports
Air Pressure

9. Quick Exhausts.
Can be fitted to speed up action of gate. They allow exhaust air
to vent to atmosphere rather than back through pipe and valve

10. Flow chart

11. Double acting ( Ended) 5/2 valves
Two main types. ( Spring return to center position)
All ports closed
All ports open . Used for applications that need constant pressure on a cylinder to keep device in position. ( Very rare on concrete plants)

12. Flow Chart
All ports closed allows no air to pass to cylinder and when either side is energized air will flow to cylinder until power is removed and then internal spring will return valve to center position
All ports open allows air to pass to cylinder. Cylinder seals must be is perfect condition with no slight leaks otherwise cylinder will leak open and device will not stay in position.

13. Double ended 5/2 no return to center.
Similar to main valve types except when one side is energized the valve will stay put in position until the other coil is energized.
Can be used on diverter gates.
Not an inching valve.

14. Hydraulic systems
Typcially used on mixer gates
Some plants have adapted the pumps to feed fill and scale gates.
Have seen some overloaded pumps so oil is stolen from main device to feed secondary device.
Ensure you have enough pressure /flow to operate all devices that work at the same time.
Change filters and oil regularly
Avoid running pumps when not required.
Inspect hoses and fitting monthly
High pressure can cause serious injury/death
Valves similar to pneumatic. Exhaust ports return to tank

15. Typical Setups

16. Please Complete Your Evaluation
Complete your evaluation online:
PRC-002
Brendan Kavanagh
All breakout session materials can be accessed at: marketing.commandalkon.com/cc2016/index.htm
Thank You!