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 pressure relief valve that has its closing force provided by a spring.

A physical object that is an instrument, machine, machine part, or tool that cuts.

A control valve that is intended to operate at high temperature, and admit water into a deluge system.

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.

A membrane valve that is a membrane valve where the closure member is a resilient diaphragm being forced against a port.

A process column intended to enable a distillation process.

A 'device' that is providing diversion of something from an expected course or direction.

A block and bleed valve that is incorporating two seats, each of which provides a seal, and a means of venting the space between the seats. The seats may isolate with the pressure differential acting in the same or in opposite directions depending on the design.

A valve that is intended for subsurface control/check operation.

A control valve that uses a rotating disc as closing element, and with a design that causes the disc to take a slightly eccentric path during actuation.

A valve that has a closing member which is an eccentric rotating disc.

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

A closed transport device that is a gathering line tied into a trunk line.

A tank or vessel in which a process stream is charged or pumped and where lighter products flash off or vaporize and are drawn off at the top. The remainder heavier fractions are drawn off at the bottom of the vessel.

A flexible vertical or near vertical pipe for the flow of liquid or gas between the seabed and the surface.

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

A physical object that is an open structure of beams or bars.

A static device generating centrifugal force from an incoming flow which separates solid or liquids from a gas of a different density.

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 valve that is a valve where the closure member is a gate or disc with a linear motion parallel, or nearly parallel, to the plane of flat seats, which are transverse to the direction of flow.

A physical object that is a casing with an arrangement of two or more gear-wheels transmitting rotating motion from the input shaft to the output shaft.

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

A valve that is a valve where the closure member is a disc or piston operating with linear motion normal to the flat or shaped seat.