4150K and 4160K Series Pressure Controllers and Transmitters
- 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
- 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.
- Sour Service Capability—Materials are available for applications handling sour process fluids. These constructions comply with the metallurgical requirements of NACE MR0175-2002.
- 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.
- Mounting Versatility—Install the case on a panel, wall or pipestand, as well as directly on the control valve actuator.
- Easy, Accurate Adjustments—Make pressure setting, proportional band, and reset changes with simple dial-knob controls that help to assure positive settings.
- Reduced Maintenance Costs—A spring-out cleaning wire, shown in figure 5, provides for in-service cleaning of the relay orifice.
- Sensitive Response—Area ratio of large relay diaphragm to small relay diaphragm permits small nozzle pressure changes to induce much greater output pressure changes.
Wizard II controllers and transmitters are used wherever durable, dependable, and simply constructed pressure-sensing instrumentation is required. The use of this line in all kinds of demanding applications, including those in the chemical process, gas, and oil production industries, demonstrates its versatility.
The 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.