Pressure recorder controller

Pressure recording controller, pneumatic transmission with board niotmted receiver... 

Pressure recording controller (differential), pneumatic transmission with pressure recorder, combined instrument board mounted... 

To lower the tower pressure, the hot-vapor bypass pressure recorder controller (PRC) valve is closed. This forces more vapor through the condenser, which, in turn, lowers the temperature in the reflux drum. As the liquid in the reflux drum is at its bubble point, reducing the reflux drum temperature will reduce the reflux drum pressure. As the stripper tower pressure floats on the reflux drum pressure, the pressure in the tower will also decline. 

PRC = pressure recorder controller TRC = temperature recorder controller TC = thermocouple V = viscometer... 

The temperature in a vacuum crystallizer is normally controlled by an absolute pressure recorder controller that purges air into the vacuum system or bleeds off vent gas from a condenser if the vessel is operated above atmospheric pressure. It should be capable of maintaining the temperature in the vessel to within 1 /2 C of the set point. Typically, this is done through an absolute differential pressure cell mounted on top of the vessel so that drainage can be back into the vapor space and the control signal is transmitted to a remote recorder controller. 

Liquid chlorine drawn from storage is vaporized, using hot water for heating, and passes to the reactors at a pressure of about 60 psig. A pressure recorder-controller regulates the flow of liquid to maintain constant pressure in the vaporizer. 

Pressure recording controller pneumotic transmission, with board mounted receiver... 

Pressure recording controller, board mounted, resetting locally mounted flow recording controllers... 

For pressure recorder control, find the associated pressure taps. 

To lower the tower pressure, the hot-vapor bypass pressure recorder controller (PRC) valve is closed. This forces more vapor through the condenser, which, in turn, lowers the temperature in the... 

Fig. 1. Flow diagram of production of sulfur dioxide from oleum 1, 30% oleum exchanger 2, SO vaporizer 3, reactor 4, coolant surge tank 5, coolant ckculatkig pump 6, coolant exchangers 7, sludge and acid pump 8, scmbber 9, SO2 cooler 10, gas cleaner 11, SO2 compressor 12, pulsation damper and 13, SO2 condenser. CM is the condensate FRC, flow recording controller PIC, pressure kidicatkig controller SM, steam TC, temperature recorder ...

Fig. 1. Fat sphtter. TRC, temperature recorder controller FLIC, Hquid level indicator controller PCV, pressure control valve and HCV, heat control valve.

Control of Dyeing Equipment. Over the years, the dyer and machinery manufacturer have appHed any mechanical or electrical equipment that would enable them, day after day, to produce repeatable dyeings of top quaHty. First, thermometers were installed in dye lines these soon evolved into thermocouples with remote recording. Other improvements were soon developed, such as automatic four-way valves with variable-interval controls, flow controls, pressure recorders, hydrauHc and air pressure sets on roUers, pH controls, etc. 

Tanks with vent hlters must be designed for pressures of -20 kPa and +100 kPa and must be equipped with a rupture disk. Tanks for hot loop and steam sterilizable line must be designed to withstand steam sterilization (121°C). A steam jacketed sterile vent hlter must be used to avoid condensation in the hlter and the vent hlter housing temperature controlled. The tank for hot storage is steam jacketed and insulated for temperature maintenance. Minimum instrumentation shall include level indication, temperature recording controller, pressure gauge, and pressure relief valve. 

Instrumentation on the solvent extraction equipment will usually consist of recording flow and recording temperature controllers on the feed stream, a pressure controller on the raffinate exit line, temperature recorders on the column intercoolers, and a liquid level recording controller at the liquid-liquid interface to set the extract layer withdrawal rate. 

FRC flow recorte controller TBC lemperaMe recorder controller UC level indicator corn roller PIC pressure Indicator controler... 

FRC flow recorder controller TRC temperature recorder controller LIC level indicator controller PIC pressure indicator controller... 

Figure 7. Flow and instrumentation diagram for high temperature, balanced pressure bench-scale unit. LR, level recorder LT, level transmitter TR, temperature recorder FR, pressure recorder FR, flow recording RD, densitometer PC, pressure controller TC, temperature controller GM, gas meter F, filter VSD, variable speed drive PCV, pressure regulator CV, control valve SV, solenoid valve S, gamma ray source.

The advantages of the isolated vessel technique in defining microvascular physiologic and pathophysiologic mechanisms are 1) The vessels are studied in the absence of a neurohumoral and parenchymal tissue environment, 2) it allows for direct assessment of vascular responses in defined segments, 3) transmural pressure is controlled, 4) hormones and drugs can be added to the bathing media or luminal perfusate, 5) intracellular ion concentrations can be measured by fluorescence microscopy and membrane potentials can be recorded with microelectrodes. 

Assuming a perfect material balance with no extraneous losses, the input of new monomer should match the output of polymeric product. To accomplish this and maintain essentially constant polymer solids in the reactor, the solids content should be measured and used to control the displacement of monomer-polymer solution with monomer. A satisfactory method is to use a torque tube viscometer (J) in a side stream of monomer-polymer and use a viscosity recorder-controller to control a valve forwarding monomer-polymer to the devolatilizer. Reactor pressure is used to control monomer input, replacing the monomer-polymer solution forwarded to the devolatilizer. 

During extracellular ion substitutions osmotic pressure was controlled by altering the concentration of sucrose in the saline (jjf). Changes in intracellular chloride concentration were monitored with intracellular recording electrodes containing the chloride sensitive resin Corning 47715. 

Flow record controller Temperature record controller Temperature indication controller Temperature recorder Pressure indication controller Level record controller pHIR Indication recorder... 

Exit gas leaves the top of the reactor and passes through a heated line (to avoid condensation of liquids) to a cooler-condenser. Liquid products are collected in a knockout pot and are drained through a solenoid valve actuated by a sonic liquid-level controller. A dome-loaded, back-pressure regulator controls the reactor pressure and reduces the pressure of the exit gas. The exit gas rate is measured by a wet-test meter. Carbon monoxide and carbon dioxide concentrations in the feed and exit gases are measured by two continuous infrared analyzers and are recorded. Aliquot samples of feed and exit gases are taken during each test period for analysis of all components by mass spectrometer (Consolidated Engineering Model 21-103). 

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