Tianjin KXC Metal Products Co., Ltd.

Valves are an essential component in industrial applications. They control the flow of liquids from one vessel to another. Valves also help to start or stop the flow of any liquid, and valves need to work properly to prevent leaks and to properly control the flow of liquid. There are many valves on the market. Eccentric butterfly valves play a major role in this and are explained next. Although it is said that eccentric butterfly valves play a major role in valves, I have a doubt? -Why is he so important:. Let's start with three advantages of eccentric butterfly valves. Eccentric butterfly valves require very little space in the piping system. Reduced elastomeric strain in the sealing area due to the double eccentric valve bearing, resulting in less maintenance work. They flow more favourably into the flapping disc over the entire pivoting range than closing devices placed vertically in the pipeline. Last but not least, they have a smaller driving torque, especially in the case o...

As a manufacturer of weir diaphragm valve , I hope this article will help you by explaining the definition and types of diaphragm valves. What are Diaphragm Valves? Diaphragm valves utilize a flexible diaphragm to obstruct, control, or isolate the flow of fluids. The diaphragm acts as the flow control element that flexes up or down to increase or decrease the fluid flow rate, respectively. The sealing action of the valve is created as the diaphragm is pressed onto the solid dam inside the valve body. Diaphragm valves are classified as linear motion valves, which require linear motion of the flow control element. Diaphragm valves can handle liquids, gaseous fluids, and semi-solid media such as slurries, colloids, sludges, and brackish water well. These valves are ideal for handling liquids with solid particulate matter. Compared to other valves, they have a much simpler construction. Due to the minimal contact made by their internal components, the build-up of sediments and biofilms in...

In recent years, metal-seated eccentric butterfly valves have competed with more traditional industrial valves like the globe and ball valves for critical applications. However, even though lots of people already know how a butterfly valve works, much of the confusion lies in how such eccentric valves differ and what applications are suitable for each. In this article, you are going to walk through the differences between these two kinds of butterfly valves to guide you when choosing a suitable industrial valve for your application. Double Offset Butterfly Valve Double-offset valves feature have two offset stems that offer especially long life due to reduced contact between valve, discs, and seats, and are known as high-performance butterfly valves. If your operations involve high pressures and particulate fluids, this type of valve can be especially useful. Apart from triple-offset butterfly valves, they are one of the most widely available eccentric-type butterfly valves on the mark...

How the ball valve works A ball valve  is a globe valve that allows, blocks, and controls the flow of liquids, gases, and vapors in a piping system by rotating a ball with a hole in the valve. The ball is mounted on two seats and has a shaft that connects the ball to the operating and control mechanism that rotates the ball. When the cross section of the orifice is perpendicular to the flow area, fluid is not allowed to pass through the valve. Fluid flows through the valve, and the fluid flow rate depends on the area of the hole exposed in the floor. Ball valve is a kind of quarter-turn valve together with plug valve and butterfly valve. They can be operated manually or using actuators. The simplest operation of a ball valve is with a wrench or a lever turned manually by the operator. Apply torque to turn the lever arm 90° clockwise or counterclockwise to open or close the valve. If the lever arm is parallel to the pipe, the valve is open. If the lever arm is perpendicular to the p...

What is a Check valve? A check valve   is typically installed in a pipeline to prevent backflow. A check valve is basically a one-way valve in which fluid can flow freely in one direction, but if the flow is diverted the valve will close to protect the pipeline, other valves, pumps etc. Water hammer can occur if the flow is diverted and no check valve is fitted. Water hammer often occurs with great force and can easily damage pipework or components. Types of check valves There are several types of check valves   available for water and waste water applications. They work in different ways but serve the same purpose. AVK offers a wide range of swing check valves, ball check valves, tilting disc check valves, tilt seat check valves, nozzle check valves and silent check valves. The most common types of water and waste water check valves are swing check valves and ball check valves. Swing check valves: Swing check valves are fitted with a disc that swings on a hinge or shaft. The ...

Resilient Sealed Butterfly Valves vs. Metal Sealed Butterfly Valves For metal-seated butterfly valves, both sealing surfaces of the valve are metal materials or other hard materials that do not seal well, but have good mechanical properties, such as high temperature resistance and resistance to wear. While one sealing surface of resilient seat butterfly valve is metal material, and the other sealing surface is non-metallic resilient material. The resilient seat has good sealing performance, but has poor mechanical properties, such as not high temperature resistance and easy wear. Resilient seal butterfly valve  has good sealing performance and can reach zero leakage, but has poor thermal adaptability and short service life. Hard seal butterfly valve has bad sealing performance and can't reach zero leakage, although some manufacturers claim that their products can do it. Metal sealed butterfly valves can be used for some corrosive media, while resilient sealed butterfly valves canno...

Choosing the wrong type of valve can be detrimental to your operation. There are several different types of butterfly valves on the market, including high performance, resilient seat, and triple eccentric.   Offset in Butterfly Valves When looking at butterfly valves, the difference between high performance, resilient seat, and triple eccentric butterfly valves has to do with valve offset.    High Performance Butterfly Valves This popular valve is also known as a  high performance butterfly valve  or double offset butterfly valve. The valve has two off-centered stems. This creates a cam action during the application.   ◮1 ST Offset: The axis of the shaft is behind the centerline of the sealing point of the disc seat. ◮2 Second Offset: The axis of said shaft is eccentric to the center of the valve/tube line.   High performance butterfly valves are typically used in: power generation, pulp and paper, HVAC, chemical, oil and gas, water and wastewater trea...

Knife gate valves are designed primarily for on/off and isolation service in systems with high suspended solids content. Knife gate valves are particularly suitable for handling slurry, viscous, corrosive and abrasive media. These valves have minimal pressure drop in the fully open position, they are easy to start, they have a relatively low weight and are cost effective.   When are knife gate valves used? Knife gate valves are commonly used in mining , power plants and in the paper, chemical and food industries. Knife gate valves have the advantage of being very compact due to the linear movement of the closing flap (the plate that stops the flow of fluid in the closed position). The knife gate valve is primarily a globe valve, although it can also be used as a control valve when the flapper valve is in the partially open position. Knife gate valves can be used for fluids containing solid particles, such as waste water or sludge. Generally, knife gate valves are designed to seal o...

Gate valves and ball valves are the most commonly used flow control valves on the market. They are commonly used to control the flow of liquids and gases. Although they are used in similar settings, there are some important differences between these two valves. We discuss the differences between gate and ball valves and how to choose between them. 1.Selection criteria The following criteria can be considered before choosing between a ball valve and a gate valve . Ports: Gate valves have 2 ports, while ball valves can have more than 2 ports. Flow rate: Gate valves can provide a greater flow rate than ball valves as they are usually available in larger diameters. Opening and closing speeds: Ball valves are more suitable for applications requiring faster opening and closing speeds or in emergency situations because of their quarter open/close operation. Gate valves require more than 360° of rotation and therefore operate slower than ball valves. Sealing: Compared to gate valves, ball valv...

AWWA SS Knife Gate Valve Gate Valve   Specifications : Size: DN50-450 （2"-18"） Pressure: 150LB Standard:  ASME B16.5 150LB, API609, API598 Knife gate valve  opening and closing part is the valve plate, the plate movement direction is perpendicular to the direction of the fluid. Knife gate valve can only be fully open and fully closed, can’t be used for adjusted and the throttle. The valve adopts bidirectional sealing design, and the installation direction and medium flow direction are not limited. The inside and outside of the valve bodyadopt powder epoxy resin electrostatic coating, which can effectively prevent corrosion and rust caused by contact between valve body and medium, and can be used in sewage system. For the installation of valves using in deep well and underground pipe, deep well connecting cap or lengthening rod mechanism can be provided according to customer requirements.

Extension Spindle Flange Butterfly Valve Butterfly Valve   Specifications : Size: DN50-DN1200 Pressure: PN10/PN16 Standard:   ISO5211, DIN2501 PN10/PN16, DIN3202 The length of the short structure can save raw materials and installation space, and also effectively support the strength of the pipeline. The valve block is the correct movement of the gate, extrusion fast, to ensure effective sealing valve . According to different working conditions demand design V, triangle, or five corners and other ports, in order to meet the needs of various flow regulation. No groove at the bottom to make sure no slag and full bore flow. Bundor valve strict implementation of the API598 experimental standard, for each product to implement 100% positive and negative double pressure test, guarantee delivery to customers is 100% qualified products.