A valve that can be used to modify (regulate) the fluid flow rate in a process control system. It usually includes an actuator, which responds to a signal from the controlling system and changes the position of the flow controlling element in the valve.
A regulator that operates automatically to affect a controlled variable by comparing the value of the controlled variable with the value of a reference variable in order to reduce the difference between them.
A physical object for moving articles or bulk material from place to place (as by an endless moving belt or a chain of receptacles).
A cooler and an air cooled heat exchanger that is a tall structure through which air circulates by convection.
An element located in a flowstream using the Coriolis principle to measure the flow.
A mass flow meter that uses the Coriolis principle to measure a mass flow rate through the meter.
A detecting element that is a piece of suitable metal meant to corrode and give an indication of the corrosion rate.
A detecting instrument intended to measure, indicate and/or produce a signal which represents the rate or degree of corrosion.
A transmitter that is producing a standardized output signal dependent of a received input signal from a corrosion sensor.
A detecting instrument that counts, especially an electronic or mechanical device that automatically counts occurrences or repetitions of phenomena or events.
Connecting with a coupling or coupler.
A mill that uses pressure or impact to reduce the particle size of solid materials.
A piece of equipment specifically designed to remove moisture from air.
A signal converter that is intended to convert one current signal to another current signal.
A signal converter that is intended to convert an analogue signal (4 - 20 mA) to a proportional linear pneumatic output signal.
A signal converter that is intended to convert a current input signal to a proportional voltage output signal.
An instrument transformer in which the secondary current, in normal conditions of use, is substantially proportional to the primary current and differs in phase from it by an angle which is approximately zero for an appropriate direction of the connections.
A transmitter that transmits an analogue electrical current.
A device that damps, typically a valve or plate (as in the flue of a furnace) for regulating the draft, or a device to stop vibration, typically a shock absorber or snubber.
A device that removes air or gases (methane, H2S, CO2 and others) from drilling liquids.
A control valve that is intended to operate at high temperature, and admit water into a deluge system.
An analysing instrument intended to determine the density of a substance.
An analysing instrument intended to determine the dew point of a substance.
A facility for measuring dew point and transmitting a signal representing the measured temperature.
A diaphragm valve that is equipped with an actuator that manipulates a stream of fluid in the response to a signal from an external sensing element and with input of energy from an external source.