Hvac Piston Metering Device

This seats the piston so refrigerant must pass through the orifice.

Hvac piston metering device.

Just one quick question on the condensing unit it calls for a piston size. The metering device is responsible for feeding the proper amount of refrigerant to the evaporator coil. In case you are like i was a piston is a fixed orifice metering device used in systems for many years. Hvac parts shop 7252 w frontage rd suite b merriam ks 66203.

This device has two jobs. Capillary tubes cap tubes are also used to meter refrigerant to the evaporator coil. It is also know as the expansion device. 61 25414 09 flowcheck piston kit.

I cant figure out what this stand for. This unseats the piston and allows the free flow of refrigerant. The advantage of a piston is that it is simple and it can still be removed the bore size changed and cleaned if required. Metering device at work a metering device provides a pressure drop point.

61 25414 12 flowcheck piston kit. They are especially in residential heat pumps and straight cool systems. Search by model number. If a pressure drop occurs in the liquid line and the refrigerant has no subcooling the refrigerant will start to revaporize change state from a liquid to a vapor before reaching the metering device.

Even now that txvs and eevs are becoming more popular you will still see pistons in many new carrier models being used outside as the heat mode metering device. Hvac parts shop 7252 w frontage rd suite b merriam ks 66203. A piston is a replaceable metering device with a fixed bore. 10w99 100484 15 kit rfc piston 065 2 5 ton.

Metering devices expansion valves. The piston type comes in various sizes and is interchangeable with the capacity or tonnage of the condensing unit. It is essentially a piece of brass with a hole in the center the smaller the bore the less refrigerant flows through the piston and vice versa. With the reversing valve de energized the flow reverses.

Always follow the manufacturer s instructions for piston size if using the fixed orifice for hvac refrigeration. Im just trying to understand what the id and od stand for. One says id and the other says od.