A controller that uses in-built algorithms executed by electronic circuitry to perform its function.

A valve that is assigned to act in case of emergency.

A detector that is intended to sense a flame.

A specially designed switch with connections for inputs from multiple flame detectors. The switch has a built in logic to determine the presence of a flame based on these inputs.

A regulator that normally use the differential pressure principle across an orifice to control the valve trim and regulate flow.

A functional switch that is intended to give a signal when the flow have reached a pre-set value.

A flow transmitter providing an output signal that is proportional to the flow inputs from a flow element.

A device capable of detecting droplets of water vapour suspended in the air near the ground.

A detector that is intended to sense the presence of a specified concentration of a gas.

An internal combustion engine that is a reciprocating engine in which gaseous fuel is mixed with air to form a combustible mixture in a cylinder which is fired by spark ignition.

A turbine that compresses air which is then mixed with fuel for combustion and expansion through a turbine section to generate relatively high power output for either mechanical drive or power generation.

A control valve that is a gate valve and an actuated valve.

A control valve that is a globe valve and an actuated valve.

A controller that is designed or can be programmed to operate and control hydraulic operated systems.

A functional switch that is intended to give an on/off signal when particulate material or fluid level have reached a pre-set value.

A transmitter that produces a continuous standardized output signal dependent of a received input signal from a level sensor.

A detector which is capable of detecting selected types of liquids.

A level transmitter which uses a floater and magnetic contacts to measure and transmit level.

An operated valve that is opened and closed with a motor.

A valve not designed to regulate flow (e.g. on/off). A valve with multiple orifices or flow-restriction device to control fluid flow. Includes an actuator that needs auxiliary power to operate.

A valve not designed to regulate flow (e.g. on/off). A multi port valve which has the possibility of multiple distinct paths for flow through it. Includes an actuator that needs auxiliary power to operate.

A needle 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.

A mist detector that is intended to detect oil mist.

A detector that is intended to detect a pig inside the pipeline or pig receiver.

A pressure relief valve that uses a pilot valve to indirectly activate the main valve.