Valves Flashcards
What is the term for a seal which metal parts do not move in relation to each other and are normally sealed by bolt heads, rivets, cover plate or plug etc…?
Static seal
What type of coupling dampen torsion from the MDE preventing their propagation through to the reduction gear?
Torsion damping couplings
How do you add lube to a lubricated plug valve?
Remove the lubricant set screw from the stem, insert stick of lube, replace set screw and force lube into stem
What type of valve is used to control the flow of gas or liquid?
Solenoid valve
How do you mount a swing pivot valve
Horizontal
What type of fitting normally has 4 parts?
union
What type of material is used to make pipe tubing grades 304 and 316
Stainless steel
Which material is widely used as a sealing device?
Copper
What type of connection should be used on copper water supply piping for shore units?
Solder
What type of bourdon tube gauge is used to measure pressure above atmospheric pressure?
Duplex
Before tightening bolts on a bonnet valve what position should the valve be in?
partially open
How much can you adjust a thermal Expansion valve?
Never or as little as possible
When packing a valve how should the gaps in the packing be arranged?
staggered
A pipe’s actual inside diameter will vary depending on?
Wall thickness
What direction is the stem on a valve installed?
up
Swing pivot check valves are installed in what position?
horizontal
The most common type of stop valves are?
Globe, gate, needle, AND PLUG COCKS
Which valve is used when a straight line flow of fluid with minimal flow restrictions is required?
Gate valve
Which valve is a quick acting and can be used for both positive shut off and some throttling
Butterfly
What are two types of gate valves?
Rising stem and non rising stem
A simple type of directional control valve is known as what type of valve?
Check valve
Most common type of pressure control valve is a?
Relief valve
