he 4150K and 4160K Series controllers, shown in
figure 1, compare a sensed process pressure (or
differential pressure) with an operator-adjusted set
point, and send a pneumatic signal to an adjacent
control element that maintains the process pressure
at or near the set point value. The 4150K Series
transmitters sense process pressure and send out a
pneumatic signal, usually to an indicating or
recording device that directly indicates the process
pressure.
Unless otherwise noted, all NACE references are to
NACE MR0175
−
2002.
Features
D
Wide Range of Sensing Elements
—A
Bourdon tube is available for high pressures or
bellows for vacuum and low pressures. Either kind of
sensing element can be installed in the case with the
controller or transmitter. Two interchangeable
ranges of output bellows and gauges also are
available.
D
Sour Service Capability
—Materials are
available for applications handling sour process
fluids. These constructions comply with the
metallurgical requirements of NACE MR0175-2002.
Environmental restrictions may apply.
D
Mounting Versatility
—Install the case on a
panel, wall or pipestand, as well as directly on the
control valve actuator.
D
Reduced Maintenance Costs
—A spring-out
cleaning wire, shown in figure 5, provides for
in-service cleaning of the relay orifice.
W3525-1 / IL
Figure 1. Wizard
R
II Controller Yoke-Mounted on
Control Valve Actuator
D
Easy Conversion to Another Mode
—Add
reset action to a proportional controller by adding
only one valve and three pieces of tubing, as shown
in figure 6. The original case may be used in either
instance.
D
Easy Reversibility
—Switch action from direct
to reverse or vice versa without additional parts. As
illustrated in figure 7, simply transfer the reversing
block to the opposite side of the flapper and change
the feedback bellows frame tubing connections.
D
Easy, Accurate Adjustments
—Make
