|
45° elbow fitting
| |
A hose fitting with female threads that runs off the end of the hose at 45° angle.
|
|
45° male elbow
| |
A steel tube fitting that joins two tubes at a 45° angle.
|
|
90° elbow fitting
| |
A hose fitting with female threads that runs off the end of the hose at a 90° angle.
|
|
adapter
| |
A pipe fitting that extends a run by joining two pipes of different types.
|
|
adjustable straight thread O-ring fitting
| |
A reusable fitting that is sealed by an O-ring located between the termination of a straight OD thread and a washer and locknut. The adjustable straight thread O-ring fitting can be tightened and fixed in any orientation.
|
|
barb
| |
An angled cylindrical feature on the OD of a fitting that grabs and holds the ID of a hose. Barbs are designed so that hose is easily mounted over the fitting, but is difficult to remove.
|
|
barbed fitting
| |
A fluid power fitting used with hose. A barbed fitting is characterized by the presence of angled barbs that grab and hold on the ID of a hose.
|
|
bell reducer
| |
A pipe fitting that extends a run by joining two pipes of different diameter. Often called a reducing coupling.
|
|
bite-type fitting
| |
A fitting with a sharpened ferrule that "bites" the tube when compressed. The bite of the ferrule provides the seal.
|
|
cap
| |
A pipe fitting that terminates a run by closing an end. A cap has female threads.
|
|
captive nut
| |
A nut that is affixed to a fitting. Because a captive nut is part of a fitting, the captive nut is a means to rotate the entire fitting.
|
|
clamp
| |
A mechanical device used to compress the flange against the O-ring in a split-flange O-ring fitting.
|
|
compression
| |
The force applied when two mating, threaded fitting components are tightened together. Compression is the primary force behind many of the fluid power seals.
|
|
compression fitting
| |
A type of tube fitting that is sealed by pressure caused by the interaction of threaded portions of the fitting.
|
|
crest
| |
The high point of a thread.
|
|
crimping
| |
The process of mechanically attaching a permanent fitting to the end of a hose. Crimping involves squeezing the metal fitting until it is bound to the hose.
|
|
cross
| |
A pipe fitting that joins one pipe run to another that runs perpendicular and through the main run.
|
|
deburr
| |
To remove sharp projections left by the cutting tool after a cutting operation.
|
|
double shutoff quick disconnect fitting
| |
A quick disconnect fitting with one valve located in the stud connected to the hose and another valve located inside the fitting component that attaches closest to the air supply.
|
|
dryseal
| |
A sealing condition caused by the crest of one thread contacting the root of another thread. Dryseals do not allow fluid to leak from a fluid system.
|
|
dynamic seal
| |
A seal that is made between two objects that move relative to one another during operation.
|
|
elbow
| |
A pipe fitting that changes the direction of a pipe run. Ells are available in 22.5°, 45°, 60°, and 90° and have female threads on both ends. Elbows are also called ells.
|
|
ell
| |
A pipe fitting that changes the direction of a pipe run. Ells are available in 22.5°, 45°, 60°, and 90° angles and have female threads on both ends. Ells are also called elbows.
|
|
external leakage
| |
The unintentional movement of fluid from a system into the environment.
|
|
face seal O-ring
| |
A means of attaching and sealing the other end of the flare-type or flareless fitting body to a component. The face seal O-ring acts much like a non-adjustable straight thread O-ring fitting.
|
|
female thread
| |
A type of thread that appears on the inner diameter of a cylindrical part or hole.
|
|
ferrule
| |
A sleeve that provides a seal when compressed between two mating fitting components.
|
|
ferrule
| |
The sleeve-like portion of a flareless fitting that provides a seal by being compressed.
|
|
ferrule compression fitting
| |
A type of two-piece compression fitting that forces a metal sleeve, or ferrule, against the tube as the fitting is tightened.
|
|
fitting
| |
A fluid component that connects, redirects, extends, or terminates the run of a fluid conductor.
|
|
flange
| |
A short cylindrical component used to seal and reinforce the connection between a fitting and a conductor. A flange fits around the conductor and is held in place by clamps.
|
|
flank
| |
The side of a thread between the root and crest.
|
|
flare fitting
| |
A type of tube fitting that is connected to a flared end of a tube.
|
|
flareless fitting
| |
A fitting that achieves a seal through the compression of mating parts and a ferrule on the unflared end of a tube or hose.
|
|
flare-type fitting
| |
A fitting that achieves a seal through the compression of mating parts on the flared end of a tube.
|
|
flat-face O-ring
| |
A means of attaching and sealing the other end of the flare-type or flareless fitting body to a component. The flat-face O-ring acts much like a non-adjustable straight thread O-ring fitting.
|
|
hose clamp
| |
A circular clamp that fits around the OD of a hose where it meets the barbed fitting. A hose clamp provides pressure so that the hose does not slip off the barbed fitting.
|
|
hose fitting
| |
A type of fitting used to connect a hose to another fluid component.
|
|
inner diameter
| |
The interior surface of a cylindrical part or hole.
|
|
interference
| |
The primary cause of pipe seals. Interference is caused by the interaction of inner diameter and outer diameter threads when tightened together.
|
|
internal leakage
| |
The unintentional movement of fluid from one component to another.
|
|
land
| |
The portion of a flareless fitting into which the end of a tube is placed.
|
|
leakage
| |
The movement of fluid either out of a fluid system or from one fluid component to another. Leakage causes a loss of effiency and often leads to system failure.
|
|
locknut
| |
A component of an adjustable straight thread O-ring fitting that tightens an O-ring between a washer and the flat surface of a fluid component.
|
|
lubrication
| |
The application of a substance to reduce friction between two surfaces in relative motion. Oil and grease are commonly used for lubrication.
|
|
male thread
| |
A type of thread that appears on the outer diameter of a cylindrical part or round feature.
|
|
manifold
| |
A block of metal with multiple integrated channels designed to conduct fluid in confined spaces.
|
|
metal-to-metal fitting
| |
A fitting that achieves a seal through contact between two metal surfaces.
|
|
nipple
| |
A small section of pipe of varying length used to connect fluid components.
|
|
non-adjustable straight thread O-ring fitting
| |
A reusable fitting that is sealed by an O-ring located between the termination of a straight OD thread and the wrench flats used to tighten the fitting inside a component. This type is non-adjustable because it does not point in any particular direction.
|
|
nonpositive seal
| |
A seal that allows a small amount of fluid to pass through.
|
|
nut
| |
The portion of a flareless fitting that is tightened to provide compression on the ferrule of a flareless fitting.
|
|
O-ring
| |
A flexible, rubber-like ring that is used to create a mechanical seal. O-rings are usually located in a groove and compressed between two or more fitting components.
|
|
O-ring compression fitting
| |
A type of two-piece tube fitting that, when tightened, squeezes an O-ring and forms a seal.
|
|
O-ring fitting
| |
Any fluid power fitting that uses an O-ring as the primary sealing mechanism.
|
|
outer diameter
| |
The exterior surface of a cylindrical or round feature.
|
|
permanent fitting
| |
A hose fitting that is attached to the hose on a continuing basis.
|
|
permanent hose fitting
| |
A fitting that is permanently attached to a hose. When the hose or fitting fails, both must be discarded.
|
|
pipe fitting
| |
A type of fitting used to connect, redirect, extend, or terminate a pipe run. Pipe fittings come in a variety of shapes and are often named for the letters they resemble.
|
|
plug
| |
A pipe fitting that terminates a run by closing an end. A plug has male threads.
|
|
positive seal
| |
A seal that does not allow any amount of fluid to pass through.
|
|
preventive maintenance
| |
Maintenance performed while a component is in working order to keep it from breaking down. Preventive maintenance includes lubricating, tightening, and replacing worn parts.
|
|
push-lock reusable fitting
| |
A reusable fitting that is forced onto the end of a hose and locked into place.
|
|
quick connect fitting
| |
A fitting that is designed to attach to a line quickly and efficiently. A quick connect fitting is often a one-piece fitting that is forced onto the end of a hose and locked into place.
|
|
quick disconnect fitting
| |
A fitting designed for use with components that are moved often and for avoiding disrupting system air pressure or compromising safety.
|
|
quick-connect fitting
| |
A hose fitting that can be connected and disconnected with ease.
|
|
reducing bushing
| |
A pipe fitting with male and female threads that extends a run by joining two pipes of different diameter.
|
|
reducing coupling
| |
A pipe fitting that extends a run by joining two pipes of different diameter. Often called a bell reducer.
|
|
reusable fitting
| |
A hose fitting that may be used again once the hose wears out and is replaced.
|
|
reusable hose fitting
| |
A fitting that is not permanently attached to a hose. When the hose fails, the fitting may be mounted on a new hose.
|
|
root
| |
The bottom of a thread valley.
|
|
rotary seal
| |
A dynamic seal achieved between a stationary cylinder and a rotating piston or shaft located inside the cylinder.
|
|
rotary union
| |
A fitting component designed to provide a dynamic seal while rotating continuously at high speeds.
|
|
run-to-failure
| |
A maintenance policy that allows a component to run until it breaks down, at which point reactive maintenance may be performed.
|
|
SAE straight-thread O-ring boss
| |
A reusable fitting that is sealed by an O-ring located between the termination of a straight OD thread and the wrench flats used to tighten the fitting inside a component. Also called a straight thread O-ring fitting.
|
|
seal
| |
An intentional obstruction designed to keep fluids inside a fluid power system.
|
|
single shutoff quick disconnect
| |
A quick disconnect fitting with a valve located inside the fitting component that attaches closest to the air supply.
|
|
sleeve compression fitting
| |
A type of two-piece compression fitting that forces the tube into a metal sleeve and creates a seal by partially distorting the end of the tube.
|
|
spiral clearance
| |
The presence of space between the root of one thread and the crest of another along the entire length of the thread. Spiral clearance allows fluid to leak from a fluid system.
|
|
split-flange O-ring fitting
| |
An O-ring fitting used for large OD tubing. To form a seal, a flange is tightened over an O-ring with clamps.
|
|
static seal
| |
A seal that is made between two stable and immovable components.
|
|
straight coupling
| |
A pipe fitting that extends a run by joining two identical pipes end on end.
|
|
straight fitting
| |
A hose fitting with male threads that runs straight off the end of the hose.
|
|
straight thread O-ring connector
| |
A type of tube fitting with straight, untapered male threads used to connect two tubes. An O-ring is used to form the seal.
|
|
straight thread O-ring fitting
| |
A reusable fitting that is sealed by an O-ring located between the termination of a straight OD thread and the wrench flats used to tighten the fitting into a component. Also called an SAE straight-thread O-ring boss.
|
|
straight through quick disconnect fitting
| |
A quick disconnect fitting with no valves. Straight through disconnect fittings cannot be added or removed without first shutting off the air supply.
|
|
street ell
| |
An ell pipe fitting with female threads on one end and male threads on the other.
|
|
stud
| |
The component of a quick disconnect fitting that attaches to a hose.
|
|
swivel
| |
A fitting component designed to provide a dynamic seal while rotating at low speeds, often at less than 360° of rotation.
|
|
tapered
| |
Gradually decreasing in size from one end of the object to the other.
|
|
tee
| |
A pipe fitting that joins one pipe run to another that runs in one direction perpendicular to the main run.
|
|
tee wye
| |
A pipe fitting that joins one pipe run to another that initally runs in one direction at 45° and eventually tapers to 90 degrees.
|
|
torque
| |
The force exerted in rotation.
|
|
union
| |
A fitting that extends a run by joining two conductors without turning the conductors to tighten the seal.
|
|
union elbow
| |
A steel tube fitting that joins two tubes at right angles, or 90 degrees.
|
|
union tee
| |
A steel tube fitting that joins three tubes. The union tee has the shape of the letter "T."
|
|
upstream
| |
In a direction toward the source of power in a fluid system. Upstream in a pneumatic system is in the direction from which the air is coming.
|
|
washer
| |
A component of an adjustable straight thread O-ring fitting that is squeezed by a locknut against the O-ring.
|
|
wrench flat
| |
One of several leveled areas around the outer diameter of a component that allow it to be turned by a tool such as a wrench.
|
|
wye
| |
A pipe fitting that joins one pipe run to another that runs in one direction at 45° to the main run.
|