Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

Micro air valve
Composite exhaust valve
Combination air valve
Breather valve
More valve>>

Phone：+86（577）67038872
Mobile：+86 1815 7711 652
Fax：+86（577）67198981
Email：merry@kaiweixi.com
Address：No. 1, Linxia Road, Oubei Street, Yongjia County, Wenzhou City, Zhejiang Province,china
Website：https://www.kaiweixi.com

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.

View detail>>
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.

View detail>>
Combination 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

Combination air valve, also known as a high-capacity combination air valve, is an important device in water transmission pipeline systems for automatic air release and intake. It combines both exhaust and intake functions, effectively ensuring safe pipeline operation. This valve typically integrates a high-pressure micro air release valve and a low-pressure air intake/release valve. Its working principle is divided into three main operating conditions: 1. High-volume air release: During initial pipeline filling, the valve opens to rapidly discharge accumulated air. 2. Micro air release: During normal operation, small amounts of air released from the water accumulate at high points in the pipeline, pushing down the internal float to open the micro-release orifice. 3. High-volume air intake: When negative pressure occurs in the pipeline, the valve automatically opens to admit outside air, preventing pipeline damage due to vacuum. Combination air valves manufactured by Kaivex Valve are widely used at pump station outlets and high points of transmission lines where air binding or water hammer is a concern, effectively improving transmission efficiency and preventing pipe bursts.

View detail>>
Breather valve

Model：
HX-Ⅰ/HX-Ⅱ/HX-Ⅲ/HX-Ⅳ/HX-Ⅴ/HX-Ⅵ/HX-Ⅶ/BV-Ⅰ/BV-ZGB/BV-ⅠZ/BV-Ⅳ/ BV-ⅣZ
Specification：
DN25~400mm
Pressure：
正压：355Pa~1765Pa，负压：295Pa（30mmH2O）
Material：
ast iron, cast steel, aluminum alloy, stainless steel, copper

Breathing Valve is a special safety valve installed on the top of storage tanks. It can automatically control exhaust and intake based on the pressure difference between the inside and outside of the tank without external energy, thereby protecting tank safety and reducing medium evaporation losses. Its working principle is driven by pressure differential. The breathing valve integrates two functional units internally: a pressure relief valve and a vacuum relief valve. When the pressure inside the tank rises above the set point of the pressure relief valve, the pressure valve opens to release excess gas. When the pressure drops and creates a vacuum, the vacuum valve opens to admit air and balance the pressure. Under normal conditions, both valves remain closed, effectively preventing the escape of medium vapors. Main types include all-weather type with flame arrester (to prevent lightning-induced fires), pressure-only/vacuum-only valves (providing single-direction protection), and type with a connection pipe (to direct vented gas to a recovery system). They can be flexibly selected according to different operating conditions. The breathing valves produced by Kaivex Valve Group are widely used on fixed-roof storage tanks in the petroleum, chemical, and food industries. Selection should comprehensively consider parameters such as the tank's design pressure, medium characteristics, breathing capacity, and set pressure to ensure reliable operation under all operating conditions.

View detail>>

Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

Micro air valve

Composite exhaust valve

Combination air valve

Breather valve

More valve>>

air valve

Micro air valve

Composite exhaust valve

Combination air valve

Breather valve