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Actuated Valves fitted with a Haitima Pneumatic Actuator
Actuated
valves with Haitima pneumatic actuators, actuators are available either loose
or fitted to ball or butterfly valves.
These
actuators are manufactured in China, a hard-anodised aluminium body with NBR
seals.
The
pneumatic actuators are available as double acting (air to open and air to
close) or single acting (air to open and spring to close).
The
Haitima pneumatic actuators carry the ATEX EXII2GDcT certification, all models
have a NAMUR interface to accept a solenoid valve,
and VDI/VDE 3845 norms for mounting accessories, such as a limit switchbox.
All actuators meet the ISO5211 and DIN-3337 specifications to make installation
to valves quick and easy.
The
valves we offer actuated in this range include, brass, cast iron, carbon steel,
plastic, stainless steel, with approvals such as WRAS, ATEX, Firesafe etc..
If the
product you are looking for isn't here then please contact us, and we will help you to get you
the package you need.
What is a Pneumatic Actuated Valve?
Actuated valves are operated using a pneumatic actuator that
automatically opens and/or closes a valve without the need for someone to go
over and turn the valve. This is
especially useful when the valves are in an awkward place to operate or get to.
The Haitima pneumatic actuator is a rack and pinion style of
actuator that operates through 90 degrees when air is applied to the ports.
How does the pneumatic Actuator work?
A pneumatic (or air) actuators has 2 ports, 1 for open and 1
for close. The actuator is designed so
that when air applied to the open port the pistons are pushed away from the
pinion, towards the end caps, and the teeth on the pistons turn the cam on the
piston to open the valve (Normally Anti-clockwise). When the air is applied to the close port the
pistons are pushed back towards the pinion which the closes the valve (normally
clockwise). When the valve is single
acting the close cycle is powered by springs so to give a fail close operation
should there be loss of air due to a compressor failure our power cut.
What pressure air is required to operate the actuators?
We generally size up the actuators using 6 bar air pressure, but we can supply for air pressures between 4 and 8 bar..
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