| Manually
Operated Valves, Pressure
Regulators, and Relief
Valves.
Manual valves isolate,
switch and control fluid
flow in a piping system.
These valves are operated
by hand with levers and
gear operators. Regulators
are self-contained valves
used to maintain a constant
pressure, temperature,
or level based on the
applied setting. Relief
valves prevent over pressure
conditions by opening
when the process pressure
exceeds the applied setting.
Click on the desired valve
type to continue with
your selection.
Ball Valves
Ball valves are reliable
and simple to use as a
shutoff valve or flow
metering valve. Just a
quarter turn of the handle
opens or closes the valve.
Handle position lets you
"see" the valve's
position.
Butterfly Valves
Butterfly valves are used
where economical, high
capacity valves are needed.
Resilient liners provide
bubble tight shutoff in
general service applications.
High-performance butterfly
valves provide excellent
flow control, and Triple
offset metal seated butterfly
valves are designed for
high pressure and high
temperature severe service
applications.
Check Valves
Check valves have a disc,
ball, or plates that open
when forward flow starts
in the pipeline. When
pressure drops, either
gravity, back pressure,
or a mechanical spring
forces the disc back against
its seat to prevent reversal
of flow (backflow).
Diaphragm Valves
Diaphragm valves have
excellent shut-off and
flow control characteristics.
A flexible molded diaphragm
regulates flow, provides
tight shutoff, and isolates
the fluid from the environment.
The valve consists of
the body, diaphragm, and
handwheel assembly. Their
simple design and wide
choice of materials make
them ideal for corrosive,
abrasive, and sanitary
services.
Float Valves
Float valves automatically
control liquid level and
prevent overfilling tanks.
The valve is operated
mechanically by a float
which rests on top of
the liquid. As the liquid
level rises, it pushes
the float up and closes
the valve. As the level
falls, the valve opens.
The amount of liquid pressure
the valve can shutoff
against is determined
by the length of the rod
and size of the float.
Gate Valves
Gate valves have a sliding
wedge or disc which reciprocates
into and out of the valve
port. These valves are
ideal for isolation of
general purpose as well
as high pressure and high
temperature applications
where operation is infrequent.
Manual operation is accomplished
through a multi-turn handwheel
assembly.
Globe Valves
Globe valves have a conical
plug which reciprocates
into and out of the valve
port. These valves are
ideal for metering fluid
flow as well as shutoff
in high pressure drop
and high temperature applications.
Available in globe, angle,
and y-pattern designs.
Manual operation is accomplished
through a multi-turn handwheel
assembly.
Needle Valves
Needle valves have a relatively
small conical seat with
matching needle-like tapered
plug on the end of a finely
threaded screw. The fine
multi-turn action provides
high resolution positioning
of the plug relative to
the seat making it ideal
for regulating fluid flow.
Needle valves are ideal
for precise flow metering,
process dampening, and
shutoff applications.
Also known as gauge valves,
needle valves are commonly
used to protect pressure
gauges and instruments
from pressure spikes by
dampening the flow/pressure.
Needle valves can be used
with pneumatic actuators
to control the rate of
valve open and close times
(speed control).
Plug Valves
Plug valves are similar
to ball valves except
instead of a spherical
element, a cylindrical
element is used as the
internal restriction.
Plug valves are typically
more expensive than ball
valves, but they are inherently
more rugged as well. The
plug is guided by a sleeve
which acts as the sealing
member. These valves are
available in 2, 3, and
4-way configurations.
Pressure Regulators
Regulators are self-operated
valves which use a spring
and diaphragm to regulate
the flow of fluids to
maintain set pressure.
Ideal where simple automatic
control of pressure, level,
and temperature is required.
Settings are field adjustable
within a specified range.
Relief Valves
Relief valves are normally
closed and use a spring
and diaphragm to monitor
process pressure. The
valve is designed to lift
sufficiently to relieve
fluid pressure build-up
over setting. These valves
help protect vessel and
piping system damage from
over pressurization.
Strainers
Strainers are placed in
process piping lines to
remove large solid contaminants
from the flow stream.
Stainers help protect
valves, pumps, and other
expensive equipment against
dirt, scale, chips and
other sediment. Strainers
should always be installed
upstream of solenoid valves
to prevent clogging of
internal passages.
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