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UWS-108AA-Fittings,JIC,Relief Valve, Dis and Ad
UWS Compressors and Tools 108AA | Notes on Power Sources for Tools
21
Sports
Undergraduate 1
10/28/2013

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Term
Oxygen fitting does not need...
Definition
Pipe dope or tape.
Term
JIC means:
Definition
Joint Industry Committee
Term
List JIC Components that make up a tubing assembly:
Definition
fitting, flare nut, and sleeve. As with other flared connection systems, the seal is achieved through metal-to-metal contact between the finished surface of the fitting nose and the inside diameter of the flared tubing. The sleeve is used to evenly distribute the compressive forces of the flare nut to the flared end of the tube.
Term
Compression fittings are sealed by...
Definition
Force, pressure.

note** Parts are not interchangeable.
Term
Quarter turn valves
Definition
-fast opening
-can proportion easily from 0 to 100%
Term
Needle valves
Definition
-slow opening
-often used so that high pressure cannot be opened quickly
Term
Gate valves
Definition
-used when adjusting flow isn't needed.
-if the valve is partially open the gate will damage the valve.
-Are designed for all open or all closed use.
Term
Diaphragm valves
Definition
-easily repaired by replacing the rubber diaphragm
-the rubber diaphragm is not suitable for sharp contents, high pressure, or steam.
Term
One way Valve Types
Definition
-swing-check valves
-spring and poppet
Term
Storm Valve
Definition
-is a non-return valve fitted in a drain, at the hull, that discharges overboard.
-it prevents sea water from backing up into the drain system.
-A storm valve is a type of swing check valve.
Term
Hooper Valve
Definition
-is a non-return valve fitted in an oil-fuel tank vent.
-is fitted to the ship's side above the water line.
- A ball inside the valve will permit air to flow to and from the tank, but will prevent sea water from entering the vent.
Term
Butterfly Valve
Definition
-Relativly New
-Lightweight
-Takes up less space than a Gate or Globe Valve
-Easy to overhaul
-Quick Acting
Term
Pressure Relief Valve
Definition
-Fitted to protect equipment, machinery, and piping, from damage due to excessive pressure.
-Sufficient to prevent a pressure increase greater than 10%
-Adjustable based on the amount of spring tension.
-Must be checked and calibrated by a competent person.
-Locked with tie wire, and a tamper proof seal.
Term
4 Types of Power Tools
Definition
Electric
Pneumatic
Hydraulic
explosive Actuating
Term
Electrical Advantages
Definition
-More powerful
-Faster than handtools
Term
Electrical Disadvantages
Definition
-Have to be specifically designed and altered for underwater us.
-Danger of Electric Shock
-Not as power as pneumatic or hydraulic
-Very Expensive
-Power Supply
Term
Pneumatic Advantages
Definition
-Readily Available
-Relatively Inexpensive
-Require no or little modification for underwater use.
-Power source readily available and portable
-Rugged and powerful
Term
Pneumatic Disadvantages
Definition
-Require strict maintenance and lubrication
-Exhausted air - uncomfortable - poor visibility
-Noisy
-Heavy and awkward
-Affected by depth, and Temperature
Term
Hydraulic Advantages
Definition
-extremely powerful
-smaller and lighter than pneumatic
-no bubbles
-Little noise
-self lubricating (little maintenance -last longer.)
-Depth has no effect
-Stalling does not harm
-Portable power supply
Term
Hydraulic Disadvantages
Definition
-Very expensive
-Note readily available
Term
Three types of motors used in power tools:
Definition
-Reciprocating
-Rotary
-Combination - a combination of reciprocating and rotary.
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