Basic systems Flashcards
(44 cards)
What is an open loop system?
The working fluid is consumed ie domestic water
What is a closed loop system?
The working fluid is reused ie Lub oil & fresh water cooling
Name the 3 tanks
Header tank (reservoir to top up), service tank (supply of clean water free fuel) & drain tank (collects oil returning from a system)
What are the 3 gauges
Contents gauge (clock/dial of how much is in a tank), gauge glass (visual indication of a tanks level press to read), sounding tube (measure depth of liquid dip stick)
What do strainers do?
Remove large course particles. Metal plates with holes in or wire baskets are washable.
What dictates the type of pipework used?
A service being supplied (the fluid), operating temperatures/pressures, other types of materials used within the system
What is phosphorus bronze pipework used for
High pressure salt water
What is copper pipework used for?
Domestic fresh water
What is copper nickel pipework used for
Lub oil
What is brass pipework used for?
Castings (valves, couplings, junctions, taps etc)
What is plastic pipework used for
Sewage/waste
What affects the type of seals used on a system
Pressure, the fluid being used, & temperature involved
What is a gasket
Creates a seal between two flat surfaces, made for various materials such as NAF, paper, leather, cork, copper & rubber
What are mechanical seals used for
Used on rotating components such as pump shaft
What are keeper ring couplings for
Used on high pressure air system connections
What are gland packing depend on? And what is is made from
Depends on fluid type, pressure and temperature. Made from silicone, wool and wax
What is the purpose of a valve
Provide a method of controlling the flow or pressure of a fluid or gas. Valves allow a system to be isolated.
What valve is 2 triangles filled in
Closed valve
What valve is 2 triangles not coloured in
Open valve
What does a relief valve do?
Prevents over pressurisation of a systsem
What does a reducing valve do
Reduces the pressure of part of a system
What does a non return valve do
Prevents the reverse flow of a fluid
What does a pressure control valve do
Maintains the pressure in a system at a set level, monitors the outlet pressure from the valve (adjust the valve position)
What is a ROV
Remote operation valve ( rod gearing to manually open or close a valve from another location or automated e.g. solenoid operated valve)
