1. Firstly, the block valve shall be vertically installed at the height of the pipeline, and then the valve body shall be screwed on the block valve with a wrench. More than 10cm maintenance space shall be reserved above the valve body.

2. If it needs to be installed on the 3 / 4-inch pipe, only 1 / 2-inch to 3 / 4-inch bushing is needed.

3. If there is no exhaust, please screw off the valve body, remove the dirt and then re install it.

Note: accessory block valve e121-z 1 / 2 inch, made of brass, 1 / 2 inch diameter.

Extended information:

Performance requirements of exhaust valve:

1. The exhaust valve should have a large exhaust volume, which can realize rapid exhaust and return to normal water supply capacity in a short time when the pipeline is empty and filled with water.

2. When the exhaust valve has negative pressure in the pipe, the piston should be able to open quickly and inhale a large amount of outside air quickly, so as to ensure that the pipeline will not be damaged due to negative pressure. And under the working pressure, the micro air accumulated in the pipeline can be discharged.

3. The exhaust valve should have a relatively high air closing pressure, and it should have enough capacity to discharge the air in the pipeline in a short time before the piston is closed, so as to improve the water delivery efficiency.

4. The water closing pressure of the exhaust valve should not be greater than 0.02 MPa, and the exhaust valve can be closed under low water pressure, so as to avoid a large amount of water gushing out.

5. The exhaust valve shall use stainless steel floating ball (floating bucket) as the opening and closing parts.

6. The valve body of the exhaust valve shall be equipped with an anti impact protection inner cylinder to prevent the floating ball (floating bucket) from being damaged prematurely due to the direct impact of high-speed water flow on the floating ball (floating bucket) after a large amount of exhaust.

7. The exhaust valve with DN ≥ 100 adopts split structure, which is composed of a large number of exhaust valves and automatic exhaust valves to meet the requirements of pipeline pressure.