Liquid filled transformers are once whose coil and core assemblies are totally immersed in an insulating liquid, all of which is usually enclosed in a sealed tank. The liquid circulates through the windings and through cooling tubes or fins projecting from the tank, which in turn radiates internal heat to the external atmosphere. Liquid circulation by internal convention provides self-cooling. Liquid filled transformers must include an air or gas expansion space within the tank itself or within an overhead conservator or expansion tank. The tank of a liquid filled transformer is often sealed. Prior to sealing, internal air is removed by purging with an inert gas, usually dry nitrogen, which provides an inert gas blanket over the liquid. These transformers may be designed for indoor or outdoor application. Most outdoor transformers are of liquid-filled and sealed construction. Liquid-filled transformers are almost exclusively medium voltage rated and above.

Liquid filter is a fluid filter, which is used for liquids, such as a screen or granular bed.

Liquid flanged end turbine flow meters are used to measure the rate of liquid flow in a pipe or process line by means of a rotor that spins as the media passes through its blades. Two types of flow meters are available that include volumetric and velocity.

Liquid Flares eliminate the logistical headaches of shipping, trucking and storage especially in hard-to-access locations on land, water and in arctic environments.

Liquid Flow Meters are analogous to meters in electrical systems. Liquid flow meters are used for measuring the flow or quantity of a moving fluid. They use four basic metering technologies differential pressure (DP), positive displacement (PD), velocity and true mass. These devices are used for high-viscosity fluids. These types of liquid flow meters include thermal meters and coriolis meters. Specifications for liquid flow meters include pipe diameter, mounting style, end fittings, electrical outputs and interface options. Liquid flow meters provide signal outputs in serial, parallel, ethernet or other digital formats. Liquid flow meters measures temperature & density. They also include audible or visual alarms, averaging & controller functions, programmability and recorder or totalizer functions. Liquid flow meters are used for measuring the flow or quantity of a moving fluid.

Liquid food suction hoses are used for suction or discharge of liquid food products including oily edibles, milk, and beer. It operates on temperature ranging from -25°F to +200°F. It handles a wide variety of food products. These hoses are extremely flexible.