Illustration of how to deflate the old-fashioned heating bleeder valve

In the cold winter, it is a very happy thing to have heating. Let's introduce the deflation method of the old cast iron radiator.

operational approach

0 1

First find the radiator's bleeder valve. The valve is located in the big nut at the upper right of each group of heaters, and there will be an upright post on the big nut.

02

Next, find a big wrench or pipe wrench to screw in for the subsequent operation, and then prepare a roll of original tape.

03

Finally, prepare a wooden bucket as a water container, then unscrew the copper screw to drain water, and then unscrew the column tail screw on the big nut to deflate.

04

After exhausting, tighten the screw again, and finally seal it with raw material tape to prevent the heat from leaking out, and take safety measures.

When we exhaust the radiator, if it is a self-heating system, we must pay attention to adding pressure to the system before operating the heating system.

High altitude pipeline exhaust

In this way, in the self-heating system, we will place an automatic exhaust valve (surface mounted radiator) at the height of the pipeline or where gas is easy to gather. When the heating water comes here, the air will be discharged automatically, but this effect can't hit the nail on the head and can only assist the system to exhaust.

In the central heating pipeline, because the pipeline is also at the top, automatic exhaust valve or manual exhaust valve is placed at the top or corner where gas is easy to gather. If the heating water pipe at home is half cold and half hot, you can also drain the water pipe manually. The method is to unscrew the exhaust valve with a wrench until a water column flows out.

Automatic exhaust and manual exhaust.

They are all valves for heating system exhaust; Automatic exhaust valves are generally used in exposed pipelines, placed at the height of pipelines or where gas is easy to gather. When the heating water containing air passes through it, it will automatically discharge the air in the water, which requires constant circulation and constant exhaust. It can help exhaust the system.

Radiators generally use manual exhaust valves, so we can accurately exhaust radiators with air plugs. Although it is troublesome, it has a good effect and can solve the problem quickly.