HBGP4X Angle Waterproof Hammer Air Valve

The product is installed at local high points, long horizontal sections, long uphill sections, long downhill sections, and the end of horizontal sections of the water pump outlet pipe and long-distance water transmission pipeline (specific installation is subject to actual working conditions), and high-speed exhaust is required during water filling; When the water filling is too fast, regulate the flow and exhaust to ensure water filling safety; Continuously exhaust in small amounts when the tube is full; When the pipeline is drained and emptied, high-speed suction damages the vacuum to prevent the formation of negative pressure in the pipeline.

Working principle:

In the initial state, the floating ball with counterweight is located at the bottom of the casing, with its sealing surface always facing upwards and in contact with the sealing surface of the micro row valve seat, supporting the sliding body through the micro row valve seat. The throttle plug is located at the bottom of the throttle cylinder, and the exhaust channel between the throttle cylinder and the throttle plug is in the state of maximum flow area.

When the pipeline is filled with water, high-speed airflow enters the valve body through the lower inlet of the valve body, enters the upper part of the valve body along the annular channel between the valve body and the casing, and then discharges into the atmosphere through the casing window, valve cover hole, channel between the throttle plug and the throttling cylinder, sealing plate, and protective cover; The airflow discharged at high speed does not directly blow towards the floating ball and sliding body, so there will be no blowing blockage phenomenon during high-speed exhaust. The throttle plug remains stationary until the pressure difference of high-speed exhaust is lower than the set value.

When the water filling speed is too fast or the water column filling speed is too fast, and the exhaust pressure difference increases to the set value, the throttle plug is blown up by the airflow, blocking the exhaust port of the throttle cylinder, leaving only a few small exhaust ports on the throttle plug for exhaust. At this point, the exhaust area decreases (by more than 80%) and the exhaust volume decreases. The trapped air in the pipeline will form a buffer airbag, slowing down the water filling speed, reducing the bridging energy of the water column, and preventing water filling explosion and bridging water hammer. Due to the continued exhaust of the throttle plug at this time, the exhaust valve was not closed, so it would not cause a water hammer when the exhaust valve was closed.

When the water in the pipe is filled with water and the water level rises to submerge the floating ball and sliding body in the valve body, the floating ball and sliding body (both lighter than water) will float up, and the sealing surface of the sliding body will contact the rubber valve seat to form a high-speed exhaust port seal. The sealing surface of the floating ball and the micro exhaust valve seat will contact to form a micro exhaust hole seal. The valve is closed, and neither water nor gas can be discharged through the valve. At this time, the throttle plug falls to the bottom of the throttle cylinder due to the lack of exhaust pressure difference support, The exhaust throttle device returns to its initial position.

After the valve is closed, when there is gas in the pipeline that has not been completely discharged or precipitated, it will accumulate in the angled waterproof hammer air valve installed at the local high point of the pipeline. When the accumulated gas increases and the air pressure rises above the pressure of the water at this time, on the one hand, this air pressure will hold the sliding body against it to keep the high-speed exhaust port in a sealed state, and on the other hand, it will force the water level submerged in the floating ball to drop, causing the floating ball to fall and open the micro exhaust port, causing the micro exhaust valve seat to start micro exhaust. With the progress of micro exhaust, the air pressure gathered here decreases, the water level rises, and the floating ball seals the micro exhaust valve seat as the water level rises. Therefore, the micro exhaust valve seat can allow gas to be discharged through the micro exhaust valve seat, but water cannot. It achieves functions such as exhaust when there is gas, close after discharge, interval exhaust, and only exhaust without drainage, which can maximize the exhaust of gas present in the pipeline.

When a negative pressure occurs in the pipeline due to pump shutdown or water discharge, the water level drops, and the external air pressure is greater than the pipeline water pressure. The sliding body and floating ball fall, and the high-speed inlet and outlet are opened, which can immediately absorb a large amount of external air and eliminate the pipeline vacuum. The sliding body is made of ultra-high molecular weight polyethylene material, with a smooth sealing surface that never rusts. It forms a flat seal with the rubber sealing ring instead of a wedge tight seal, and will not stick due to long-term sealing. Therefore, it can instantly detach from the sealing surface in the event of negative pressure