OWS Flashcards
Three examples of coalescing media are:
- Metal plates
- Replaceable filters
- Brush assemblies
The oil bonds together forming droplets that float to the top of the tank and is drained off to:
Recovered Oil Tank
There are two types of OWS:
- Pressurized
- Vacuum/gravity
Vacuum/Gravity OWS come in ________.
two and three stage systems
The HELI-SEP Oily-Water Separator is a single vertical cylindrical vessel using the dual capabilities of gravity-assisted separation and coalescing to separate and remove:
- Insoluble oil
- Solids
- Entrained air from oily water
The vacuum/gravity design provides the most efficient and effective means of separating oil from water:
- It eliminates the expense associated with replaceable media such as coalescent filter elements
- The separating medium (beads) do not require replacement
The separator vessel is equiped with two sample valves to extract an oil sample and determine the ______.
Oil/Water interface level
The _______ is used for troubleshooting and repair procedures.
Oil Content Detector (OCD)
The control box contains:
- Power switch
- Operation switch
- Hand position
- Automatic position
Controls power to all internal circuits.
Power switch
The control box also contains three indicating lights:
- Red light illuminates when power is on
- Amber light illuminates when oil is being discharged from the system
- Green light illuminates when water is being discharges from the system
A ______ mounted on the vessel indicates vacuum or pressure inside the separators vessel
Combination Vacuum/Pressure Gauge
A ______ mounted on the on the systems pump outlet indicates the separators discharge pressure.
Pressure Gauge
Perform repair procedures per_________.
NSTM, Chapter 593
To establish if there is an air leak in the OWS, perform a ______ on the suction piping and the vertical cylindrical vessel.
Hydrostatic Test
What are the three possible causes for water discharged through the oil outlet valve?
- dirty oil sensing probe
- defective probe amplifier relay
- defective oil sensing probe
No oil discharge may be caused by a _______ clean water inlet line.
Depressurized
The _______ is a solenoid-operated diaphragm valve and is activated whenever an oil discharge cycle is initiated.
Clean Water Inlet Valve
A ___ can affect the discharge of water or accumulated oil.
Faulty Sensing Module
______ must be clockwise when facing the pump from the motor end. Reverse the connection of any two line leads to the motor if wrong rotation.
Rotation
What is the maximum suction lift for the pump on the OWS?
25 feet
Pump speed is ____ RPM’s.
1725 rpm’s
On what principles does the OWS operate?
Principle of coalescing. The natural ability of two dissimilar liquids to separate.
What component employs an optical system based on the principles of light scattering?
Oil Content Detector (OCD)
The “clean water inlet” and “clean water outlet” are what type of valves?
Solenoid
