VALVES
2
VAL-361
For further information www.norgren.com
Additional Information
Proportional expertise
Our pressure and flow control proportional valves incorporate
advanced spool and balanced-poppet technologies. Unlike
competitor products which rely upon miniature snap-action
seats, our valves provide true stepless pressure or flow control.
The result is smooth response, low noise, and a long trouble free
cycle life. On-board digital electronics assure maximum flexibility
and ease of tuning for specific application conditions. Self
diagnostics, optional digital displays, and a variety of Fieldbus
interfaces are all benefits of the microprocessor-based design.
Open
loop
Closed loop
140 FAILSAFE
100X
Pressure switches
Pressure sensor technology is critical when pressure monitoring
for higher plant security or pressure control for higher
functionality are needed in an application.
Electro-
mechanical
18D
33D
Electronic
Type 422 - Fail freeze ATEX IS Valve
The Type 422 IS is the only ATEX certified fail freeze
proportional valve on the market today.
Fail Freeze operation means that if the signal to the valve fails
suddenly, the unit will maintain its last output pressure, ensuring
that critical systems do not shutoff or close on plant in the event
of a power failure.
IS certification provides system designers, and users, the
flexibility to safely use potentially flammable compressed
process gases to pilot their applications, providing the
opportunity to remove the need, and cost, of installing a
pneumatic system.
One area of the Energy Sector that makes full use of these
combined unique attributes is Gas Distribution. In reduction
stations the natural gas is piped out of the line and into the Type
422 IS which then regulates it precisely positioning the actuator
and the pipeline valve, the fail freeze capability ensures the gas
stays on, even if power is lost locally.
> Operating Temp: 14°F to 158°F (-10
o
C to 70
o
C)
> Linearity: <0.5% of span
> Pressure range: 2.9 – 14.4 psi (0.2 – 1.0 bar)
> Response: <6 seconds
> Power Consumption: <0.25W
> Ingress protection: IP65
