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Check valve
Product classification of Meiyan One Pump Valve
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- ShangHai Meiyan Yi Pump & Valve Co.,LTD.
- Sales hotline：
+86 21 5640 2009 - Pump customer service：
+86 138 1691 3072 - Valve customer service：
+86 1381 6913 072 - E-mail：
my1pv@1bengfa.com
Check valve
A check valve is a one-way valve that can automatically prevent fluid backflow, also known as a one-way valve. Usually, fluid under pressure causes the valve disc of a valve to open and flow from the inlet side to the outlet side. When the pressure on the inlet side is lower than that on the outlet side, the valve disc automatically closes the channel under the action of fluid pressure and its own gravity, preventing fluid backflow from causing damage to the equipment in front of the valve. The check valves produced by Shanghai Meiyanyi Pump Valve are mainly divided into three categories: lift type, swing type, and butterfly type. The valve body of a lift check valve is often similar to that of a globe valve, and its fluid resistance is relatively high. This type of check valve is a high-pressure small-diameter valve, often using a spherical valve disc. Swing check valves have low resistance to fluids and are generally suitable for small and medium-sized, low-pressure, and large-diameter pipelines. The shape of butterfly check valve is similar to that of butterfly valve, with single and double lobes. It has a simple structure and low resistance to fluids. Pipelines that are prone to water hammer can use micro resistance slow closing check valves with buffering function to extend the closing time, slow down the speed caused by water hammer, and avoid damage to the equipment in front of the valve caused by water hammer when the check valve closes too quickly. The check valves produced by Shanghai Meiyan Yi Pump Valve come in different models and specifications such as cast steel, carbon steel, stainless steel, and forged steel materials. The following product pictures are for reference only.
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Swing Check Valve
The valve plate of the rotary check valve is circular and vertically hung on the valve stem. The valve plate and seat sealing ring of the single valve plate rotary check valve have the same slope, and are closed and sealed by the weight of the valve plate and the reverse pressure. The valve stem of the butterfly double disc rotary check valve also has a spring, which closes the valve by the spring force and reverse pressure. The swing check valve produced by Shanghai Meiyan Yi Pump Valve is a one-way valve, also known as a check valve, which prevents damage to upstream pipeline equipment caused by backflow of pipeline medium, especially at the outlet of the water pump, to prevent damage to the water pump caused by backflow of medium caused by water hammer. Swing check valve is an automatic valve that opens the valve by pushing the valve disc open under the pressure of the flowing medium in the pipeline, and closes the valve by the self weight of the valve disc, spring elasticity, and backflow water pressure.View details>>
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Lift Check Valve
Lift check valves can be divided into horizontal and vertical types. Horizontal lift check valves should be selected for horizontal installation, while vertical check valves should be selected for vertical installation. Lift check valve is an automatic valve that closes or opens the valve by the weight of the valve disc and the pressure of the pipeline in front of the valve. There are also lift check valves with springs installed behind the valve disc. The function of a lift check valve in pipelines is to prevent medium backflow and protect the safety of pipeline equipment in front of the valve. It can also be used to automatically supply auxiliary systems where the pressure may rise above the system pressure. The structural design of the lift check valve produced by Shanghai Meiyanyi Pump Valve enables it to pass smoothly during normal medium flow, but can effectively seal and prevent medium backflow when the medium flows in the opposite direction.View details>>
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Butterfly Check Valve
Butterfly check valve is a circular disc shaped valve with a single petal and double petal valve disc. It is opened and closed by rotating around the valve shaft, mainly used to prevent backflow. The sealing surface can be welded with wear-resistant materials to improve the service life of the seal, or lined with rubber type soft sealing materials to enhance the sealing performance. Butterfly check valve is a valve that opens by pushing the valve disc open under the pressure of fluid passing through it, and closes and seals the valve by relying on the self weight of the valve disc, the spring on the back of the valve disc, and the pressure of the medium backflow. The micro resistance slow closing butterfly check valve produced by Shanghai Meiyanyi Pump Valve is an improved butterfly check valve design specifically designed to reduce water hammer phenomenon. Through the combination of hydraulic cylinder and spring, its speed can be slowed down when the valve disc is closed, thereby reducing the impact of water hammer on pipelines and equipment.View details>>
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Vertical Check Valve
Vertical check valves are generally lift type check valves, with disc valve disc design and spherical valve core design. They mainly use the flow pressure of the medium and the self weight of the valve core to open and close. It relies on the pressure of the medium itself to automatically open the valve, and when the pressure of the medium decreases, the valve disc will close the valve according to its own weight to prevent medium backflow and water hammer. It only allows the medium to flow in one direction to protect the equipment in front of the valve. It is also known as a check valve, one-way valve, backflow valve, and back pressure valve, and is an automatic valve. The vertical check valves produced by Shanghai Meiyanyi Pump Valve are widely used in vertical pipelines in industries such as petroleum, chemical, pharmaceutical, fertilizer, power, and urban construction. The quality is stable, and new and old customers are welcome to choose.View details>>
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Noise Control Check Valve
Silencing check valves are mainly used in valve design to avoid absorbing and reducing pressure wave noise during opening and closing. Optimized flow channel design can improve the flow direction of the medium, reduce the flow resistance coefficient, and thus reduce the noise generated by the fluid during the flow process. Valve disc sealing materials usually use rubber soft seals, which have good sealing performance and can provide cushioning when the valve disc is closed, reducing the impact sound of the valve disc on the valve seat; The improvement of the spring reset mechanism also enables the spring to help the valve disc quickly and smoothly close when the medium stops flowing or flows back, reducing and avoiding the noise caused by the valve disc directly hitting the valve seat in traditional check valves. Therefore, the noise reducing check valves produced by Shanghai Meiyan Yi Pump Valve are widely used in environments that require quietness.View details>>
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Silent Check Valve
The semi olive shaped valve body flow channel and gyro shaped valve core design of the silent check valve can effectively reduce and absorb the noise such as pressure wave roar caused by the valve disc and medium flow resistance during use, and also prevent medium backflow. When the direction of medium flow is reversed, the valve disc begins to close under the pressure of the backflow medium and the action of the spring. The spring can help the valve disc tightly adhere to the valve seat, thereby preventing medium backflow. The applicable scenarios of silent check valves are mainly used in various situations that require the prevention of medium backflow, such as water supply and drainage systems, pump and motor protection, and auxiliary systems that require the prevention of medium backflow. The main feature of the design of the silent check valve produced by Shanghai Meiyanyi Pump Valve is to consider reducing the generation of noise, so it has been widely used in some situations that require a quiet environment.View details>>
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Clamp check valve
The main feature of the clamp check valve is that the connection method adopts a clamp structure, which makes the valve very convenient to install and disassemble, and also greatly saves the overall material of the valve. Therefore, the production and manufacturing cost of the valve is relatively reduced. The clamp check valves produced by Shanghai Meiyanyi Pump Valve are generally single disc or double disc structures, with both lifting and swing structures. They are an automatic valve type mainly used on pipelines with one-way flow of medium, allowing only one direction of medium flow to prevent accidents or damage to the equipment in front of the valve. The clamp check valve relies on medium pressure and spring elasticity to open or close by itself, and is suitable for preventing medium backflow.View details>>
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Spherical Check Valve
Spherical check valves can be divided into horizontal and vertical types, mainly using a spherical valve core as the seal for the flow channel. The ball valve core is generally covered with rubber and a metal core, which has a sensitive check effect and is suitable for sewage pipelines with mixed slurry. The working principle of the spherical check valve produced by Shanghai Meiyanyi Pump Valve is to control the opening and closing of the valve through the force of medium flow and the weight of the valve core, thereby achieving one-way flow of medium and preventing medium backflow. When the medium flows in from the inlet end, the valve disc is pushed open by the medium, allowing the medium to pass through. When the medium flows in the opposite direction, the valve core blocks the valve seat under its own weight and medium pressure, closing the valve and blocking the backflow of the medium. Spherical check valves can also be designed with single, double, or even multiple flow channels.View details>>
Contact us
- Sales hotline：
+86 21 5640 2009 - Pump customer service：
+86 138 1691 3072 - Valve customer service：
+86 1381 6913 072 - E-mail：
my1pv@1bengfa.com
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