Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

Micro air valve
Composite exhaust valve
Waterproof Hammer Exhaust Valve Air Valve
Breathing valve
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air valve

Air valve is a special automatic valve used in water supply and drainage pipeline systems, whose core function is to enter and exit air to ensure the safe and efficient operation of pipelines. An air valve is the "breathing organ" of a piping system that automatically removes or inhales air. Its work is based on the principle of float or float lever. There is a floating ball inside the valve body, which automatically opens and closes according to the density difference between water and air. When the pipeline is filled with water, the internal air is quickly expelled; When the pipeline is running normally, the float rises and closes the exhaust port; When the pipeline drains or generates negative pressure, external air is automatically drawn in to prevent vacuum. The air valves produced by Kaiweixi are divided into three categories according to their functions: 1. Inlet and exhaust valves: quickly discharge a large amount of air (when filling with water) or suck in air (when draining). 2. Micro exhaust valve: continuously eliminates trace bubbles that precipitate in the water during operation, improving water delivery efficiency. 3. Composite air valve: It combines the first two functions and is the most commonly used and effective type. It is crucial to install correctly at all high points and local elevations of the pipeline system, as incorrect installation positions can lead to its failure. Air valves are essential safety accessories for liquid pipelines such as long-distance water delivery, municipal water supply and drainage, pump stations, and siphon systems. They can effectively prevent air resistance, water hammer, pipeline vacuum deformation, and efficiency decline.

Micro air valve

Model：
ARVX/P11X/QB1
Specification：
DN15~300mm
Pressure：
1.0~2.5Mpa
Material：
Cast iron, ductile iron, stainless steel, copper

Trace exhaust valve is a key accessory used in pipeline systems, mainly used to automatically remove trace amounts of air or gas accumulated in pipelines, ensuring the stable and efficient operation of liquid delivery systems (such as water supply, heating, fire protection, irrigation, etc.). Its working principle is usually based on buoyancy mechanism: when gas accumulates inside the valve, the floating ball descends and opens the exhaust port to release gas; After the gas is discharged, the liquid enters the valve body, and the float rises to reseal the valve to prevent liquid leakage. Kaiweixi Valve Group mainly produces copper external thread micro exhaust valves, stainless steel micro exhaust valves, automatic single port micro exhaust valves, flange micro exhaust valves, etc. Micro exhaust valves can effectively prevent problems such as air resistance, water hammer, corrosion, and increased energy consumption, and improve system safety and transmission efficiency. Common types include single port and multi port micro exhaust valves, suitable for different working conditions. It has the characteristics of compact structure, automatic operation, and easy maintenance, and is an indispensable component for ensuring the long-term stability of pipeline systems.

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Composite exhaust valve

Model：
CARX/QB2/SCAR/FSP4X/DYP4X/GKPQ242X
Specification：
DN15~300mm
Pressure：
1.0~2.5Mpa
Material：
Cast iron, ductile iron, stainless steel, copper

Composite exhaust valve, also known as combination exhaust valve, is a pipeline specific valve that integrates the dual functions of "micro exhaust" and "high pressure/large exhaust". On the basis of traditional micro exhaust valves, it adds a large-diameter exhaust hole for quickly discharging a large amount of air during system startup or exhaust, achieving efficient exhaust under all operating conditions. Its core structure usually consists of two independent but collaborative parts: a micro exhaust mechanism: usually composed of small floating balls and holes, which continuously and automatically eliminates slowly accumulating micro amounts of air during normal system operation to prevent air blockage. Large exhaust system: consisting of a large floating ball (or piston) and a valve port with a larger diameter. When the pipeline is filled with water or the system is emptied, a large amount of air flows into the valve body, causing the large floating ball to fall and quickly open the large-diameter valve port to achieve rapid exhaust; When water enters, the large float quickly rises and closes the main valve port to prevent water from spraying out. Kaiweixi Valve Group mainly produces composite fast exhaust valves, composite high-speed exhaust valves, composite dual port exhaust valves, composite sewage exhaust valves, and other composite exhaust valves. Composite exhaust valves can effectively meet the gas management needs of pipelines from water filling, operation to exhaust, significantly improving system efficiency and preventing water hammer and cavitation.

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Waterproof Hammer Exhaust Valve Air Valve

Model：
KP4X/HBFGP/MSP4X/FOX/HBGP4X/FSP4X/PQ42X/DYP4X
Specification：
DN15~300mm
Pressure：
1.0~2.5Mpa
Material：
Cast iron, ductile iron, cast steel, stainless steel, copper

Waterproof hammer air valve is a key hydraulic safety device, mainly used in various water pipeline systems. It combines three core functions: efficient exhaust, rapid suction, and water hammer protection. During pipeline water injection or operation, it can quickly discharge accumulated air, preventing the formation of air resistance and vacuum sections; When the system pressure drops sharply, it can immediately suck in air to prevent the pipeline from being compressed by negative pressure. The "waterproof hammer" feature is particularly critical: when the water flow suddenly stops due to rapid valve closure or other reasons, destructive pressure waves (i.e. water hammer) will be generated. The valve can effectively buffer and dissipate this impact energy through precise intake and exhaust actions, protecting equipment such as pipelines and pumps from damage. Kaiweixi Valve mainly produces composite high-speed intake and exhaust valves, multifunctional waterproof hammer air valves, bridging waterproof hammer air valves, air supply and exhaust valves, automatic intake and exhaust valves, three-stage air valves, air supply valve vacuum breaking valves and other waterproof hammer air valves. Due to their significant contribution to the safe operation of water systems, they have become an indispensable component of long-distance water delivery, pump stations, high-rise building water supply and other systems.

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Breathing valve

Model：
GFQ/ZFQ/QZF/HXF/GFD/BF7/BF8/GHF/DFJ/FAHX/JAV/AV/XYXA/GA/HX
Specification：
50-200mm
Pressure：
正压：355Pa~1765Pa，负压：295Pa
Material：
Cast iron, cast steel, aluminum alloy, stainless steel, copper

A breathing valve (also known as a pressure/vacuum relief valve) is a specialized safety valve installed on the top of storage tanks. Its core function is to automatically regulate the internal pressure of the tank, preventing damage caused by overpressure or vacuum, while significantly reducing medium evaporation losses. It requires no external energy source and operates solely on the pressure differential between the inside and outside of the tank.Internally, the breathing valve consists of two mechanisms: a pressure relief valve (exhalation) and a vacuum relief valve (inhalation). When the pressure inside the tank rises above the set point of the pressure relief valve, the pressure valve opens to discharge excess gas into the atmosphere. When the pressure inside the tank drops below the set point of the vacuum relief valve, the vacuum valve opens to allow external air into the tank for pressure compensation. Under normal conditions, both valves remain closed, effectively preventing medium evaporation and escape.Breathing valves are categorized into:All-weather type (with flame arrester to prevent lightning-induced fires)Pressure-only / vacuum-only type (provides either positive pressure or negative pressure protection)Type with connection pipe (directs exhaled gas to a recovery system)The breathing valves produced by Kaivex are widely used on various fixed-roof storage tanks in industries such as petroleum, chemical, and food. Selection must be based on the tank design pressure, medium characteristics (toxicity, corrosiveness), breathing capacity (gas flow rate caused by filling/emptying and thermal effects), and set pressure (typically 80% of the vessel design pressure).

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

Micro air valve

Composite exhaust valve

Waterproof Hammer Exhaust Valve Air Valve

Breathing valve

More valve>>

air valve

Micro air valve

Composite exhaust valve

Waterproof Hammer Exhaust Valve Air Valve

Breathing valve