Miscellaneous Valve Symbols
Miscellaneous Valve Symbols
Check Valve - Allows flow in one direction, but blocks flow
in the other direction. In this example flow
can go from right to left, but now flow left to
right is blocked.
Fixed Restriction or orifice - Restricts flow in both directions.
Adjustable Restriction - Restricts flow in both directions.
Flow Control Valve - (also called speed control valve) allows
free flow in one direction but restricts flow in
the other direction. In this example free flow
is from right to left, restricted flow from left
to right
In this example, free flow is from left to right.
Restricted flow is from right to left.
Shuttle Valve - A three-port valve with two inlets and one
outlet. In this example
ports 1 and 2 are
ports 1 and 2 are
inlets, port 3 the outlet. If pressure is applied
to port 1, it will appear out port 3, but will not
back-flow out port 2.
If pressure is applied to port 2, it will appear
out port 3 but will not back-flow out port 1.
When the pressures are removed from ports 1
and 2, port 3 will exhaust back out one of the
two inlet ports, but it may exhaust out either
of them.
Pulse Valve A valve that allows the initial supply of air it
receives to pass through it just for a few
milliseconds (pulse), then remains closed
until the supply pressure is exhausted.
Categories:
Pneumatics System,
Valve
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