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ISUZU sewage suction truck is a special vehicle composed of chassis, an upper tank, a vacuum pump system, a sewage storage container and a washing device. The chassis is ISUZU truck chassis(ELF/FV/GIGA), which has stability and load-bearing capacity, the upper tank is often made of high-strength materials, which are corrosion-resistant and have good sealing properties. The vacuum pump system is its core component. It draws sewage and sludge into the sewage storage tank by generating negative pressure. The sewage storage tank is used to store waste and is divided into sewage sewage storage tank and sludge sewage storage tank. The washing device can spray water and cleaning agent with high pressure to thoroughly clean the dirt. ISUZU sewage suction trucks can clean and process wastewater, sludge and solid waste in a timely manner, prevent pollution, protect water sources, provide sanitation and rapid emergency response, and play an important role in environmental protection.

Whether it is ISUZU sewage suction truck or ISUZU cleaning sewage suction truck, an anti-overflow device is indispensable. The anti-overflow device can prevent the tank from being full. Flooding of the tank will pollute the environment, cause economic losses, and is easy to corrode the surface of the tank. Therefore, now Sewage suction trucks are equipped with anti-overflow devices. Today I will introduce to you what anti-overflow devices are on sewage suction trucks?

ISUZU sewage suction trucks are generally equipped with three types of overflow prevention devices:

1. Liquid level alarm device: The liquid level alarm device is often installed inside the tank of the sewage suction truck to monitor the liquid level in the sewage storage container. Once the liquid level exceeds the set threshold, the liquid level alarm device will sound an alarm to remind the operator to stop sucking dirt in time to avoid tank overflow.

2. Ordinary anti-overflow valve: The anti-overflow valve has a very light steel float. When the sewage in the sewage suction tank of the sewage suction truck reaches a predetermined position, the float ball in the anti-overflow valve rises and blocks the exhaust hole to prevent sewage from entering the exhaust pipe and the vacuum pump. However, the suction power of the sewage suction truck is very large. Yes, ordinary anti-overflow valves cannot completely prevent overflow, and sewage will still enter the air pipe and vacuum pump. Moreover, if there are a lot of floating objects in the tank, it will be difficult to lift the float ball of the anti-overflow valve and cause it to rise. Not as effective as it should be. It would still be possible if it had a better anti-overflow valve.

3. Water and gas separator: On the sewage suction truck, the water and gas separator can play two roles. One is to separate the moisture contained in the gas entering the vacuum pump. The other function is also equivalent to an overflow prevention valve to prevent water and gas from entering the vacuum pump. The anti-overflow principle of the separator is the same as that of the anti-overflow valve. There is also a floating ball in the water and gas separator. When the sewage in the water and vapor separator accumulates to a certain amount, the floating ball rises and blocks the air port to prevent sewage from entering. Vacuum pumps and water vapor separators will also encounter the same problem as the anti-overflow valve, that is, the suction force is too large and cannot completely prevent flooding.

In the end，we believes that no matter which kind of anti-overflow device it is, it plays an auxiliary role. It is not possible to rely entirely on it. The operators of the sewage suction truck still need to observe carefully so that flooding will not occur.