Hvac Metering Device Types

January 31 2018 bryan orr 4 comments the piston fixed orifice and txv thermostatic expansion valve are the two most common metering devices in use today with some modern systems utilizing an electronically controlled metering device called an eev electronic expansion valve.

Hvac metering device types.

The metering device is responsible for feeding the proper amount of refrigerant to the evaporator coil. If playback doesn t begin shortly try restarting your device. Different types of metering devices have different ways of charging. It will attempt to keep as much of the evaporator as possible filled with liquid refrigerant while still ensuring.

I m learning about hvac and i ve seen a number of videos on youtube that seem to indicate that there are a lot of problems with txv s vs. Hvac metering device types txv piston capillary tubes. The thermostatic expansion valve is used in many hvac applications including use in chillers for chilled water systems. It is superior to a fixed restriction device because it can vary the flow of refrigerant to meet varying load conditions.

A thermostatic expansion valve txv is charged to the subcooling of the liquid line leaving the condenser. What is a metering device specific types of metering devices used in hvac refrigeration. John hillis hvac pics tools trucks 0 comments a few months ago i had a new employee call to ask some questions about charging an a c. It is also know as the expansion device.

There are several metering devices in a typical system including the thermostatic expansion valve tev or txv automatic expansion valves electronically governed expansion valves balanced port tevs superheat and multi circuited tevs and evaporators. A fixed orifice is charged to the superheat of the suction line leaving the evaporator.