To enable you to make the right choice for your application Spirax Sarco has developed a range of control systems ranging
from simple self-acting controls to systems that will fit into highly sophisticated control loops.
Two-port or three-port valves manufactured in a wide choice of
materials for pressures up to 40 bar and having connections in
sizes up to DN200.
The actuators are suitable for HVAC or industrial process
applications and are available with VMD, mV or mA input
signals.
Options include: spring reserve and, where more accurate
control is required, a valve positioning card.
Two-port or three-port control valves manufactured in a wide
choice of materials for pressures up to 40 bar and having
connections in sizes up to DN200.
Pneumatic actuators are low profile to NAMUR standard,
spring-to-open or spring-to-close, and incorporate a fully rolling
diaphragm. A handwheel option is available.
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To complement the range of pneumatically actuated
control valves, pneumatic and electropneumatic
positioners will allow small actuators to close against
higher differential pressures, eliminate hysteresis and
improve accuracy and positioning time.
Variants are available with automatic commissioning,
smart control, programmable functions and digital
communications.
Panel mounted single loop controllers suitable for single
or multi-setpoint control. They incorporate PID, auto
TUNE and ADAPTIVE algorithms. Multi-input options are
available.
For the control of pressure or temperature. Pneumatic
controllers are available with simple proportional control
action, or with the addition of integral and derivative
action. Temperature sensing is via a nitrogen filled
direct expansion system and pressure sensing by
interconnecting pipework to an internal bourdon tube.
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