Introduction： A globe valve is a type of valve used in the pipeline to regulate and control the flow of the liquid or gas from one side to another side. It consists of a rotating disk that controls an opening in a pipeline by sealing it shut when the disk is turned so that only one way opens at any given time; thus allowing control over the flow rate while preventing leakage past any point where there may be damage to piping materials such as their threads or seals. The main advantage of globe valves is that they can be used for both on-off applications and for throttling applications. Application of globe valves： The globe valve is used in many industries, they can be used for water, gas, steam, and oil, including the process of chemical, pharmaceutical, and food processing. Because of its reliability and flexibility to completely shut off the flow, globe valves are therefore popularly used in industrial plants where there is an application for these pressures and temperatures. These include chemical plants, water treatment plants, oil refineries, pulp, and paper plants. 1. The first major application for globe valves is in water supply and wastewater systems. They...
Introduction If you’re getting a new pipe installed, you might have noticed there are different types of valves available. Some of them are much easier to install than others. In this article, we’ll walk you through the process of installing a lug butterfly valve—a type that’s designed to be easy and quick. 1. Disconnect the power. In order for you to safely install a lug butterfly valve, you will need to disconnect the power. This is because the lug butterfly valve is water and electrical hazard. To be safe, you should completely shut down any power to the valve and make sure all water connections are unplugged from their respective valves. 2. Unscrew the lug valve from the pipe. You can use various types of wrenches to unscrew the lug valve from the pipe. The most common options are: ①A wrench with a single handle that turns in either direction ②A wrench with two handles, one on each end (this is sometimes called a “combination” or “offset” wrench) ③A crescent wrench, which has the same shape as a pipe wrench except it’s small and can fit into tight spaces You may also be able to use ratcheting wrenches, which have...
What is a check valve? Check valves are a type of valve that make sure water flows only one way through a pipe. The main purpose of the check valve is to prevent backflow, which can occur when the water pressure inside a pipe is greater than the pressure in the surrounding area. A check valve is a type of valve that allows fluid to flow in only one direction. The valve closes automatically to prevent backflow or reverse flow when the fluid in the pipeline changes direction or stops flowing. Check valves are designed to operate without human intervention, relying mainly on the back pressure of the fluid to close the valve. Check valves are commonly used in applications where backflow or reverse flow can lead to contamination of the fluid, damage to the equipment, loss of product, or safety hazards. Examples of check valve applications include water and wastewater treatment systems, HVAC systems, oil and gas processing, and chemical processing. There are different types of check valves, including swing, lift, ball, and diaphragm check valves. Each type is designed for specific applications depending on the fluid properties, pressure, temperature, and flow rate. Application of check valve Check...
Introduction: A resilient seat seal gate valve is also called a lift stem gate valve. A resilient seat valve is a type of gate valve, which uses a flexible rubber seat to seal the valve. Resilient seat valves are used in high-pressure applications and are also called rubber-faced valves. Resilient seat seal gates have a metal disc that opens and closes the flow path by using the force of a spring. The spring exerts pressure on the disc until it contacts the rubber seal. The spring is mounted on top of the disc and pushes down on it when required. When there is no pressure, the spring will push up against its stop. This type of seal uses a resilient material as a seal instead of packing or gaskets. Resilient materials are usually elastomers such as natural or synthetic rubber or plastic materials like nylon or polyethylene. They are designed to be soft enough to compress when pressure is applied but tough enough not to deform permanently from normal operating pressures. Resilient seat seals are commonly used in industrial settings where high pressures are present. They are not ideal for applications where there may be more than one opening in...
Definition of a lug butterfly valve: The lug butterfly valve is named for the lugs on both ends of its valve. The lugs of the valve can be fixed to the pipeline to prevent the valve from wobbling or falling off when in use and can also act as a seal. The sealing performance of the lug butterfly valve is very good, which can prevent leakage, and it also has good flow characteristics with low flow resistance, which will not affect the flow of the pipeline. The lug butterfly valve is widely used in the pipeline system of chemical, petroleum, metallurgy, water treatment, electric power, food, and other industries and is a cost-effective valve product. The lug butterfly valve can be driven by manual, electric, pneumatic, and other driving methods, which can be selected according to different working conditions. In addition, the lug butterfly valve can achieve two-way sealing; that is to say, good sealing performance can be achieved in both positive and negative directions. What are the advantages of the lug butterfly valve? Simple structure: The structure of the lug butterfly valve is relatively simple, consisting of a few parts, making disassembly and maintenance relatively easy and reducing maintenance...
Definition of a knife gate valve: The knife gate valve disc in the closure, its knife mouth, and the valve seat contact form a right angle, thus completely cutting off the fluid path, similar to the knife will be cut off the pipeline. Therefore, people call it a “knife gate valve.” Specifically, the valve disc of a knife gate valve is shaped like a knife and can move axially along the pipe to control the passage of fluid. The valve seat is similar to a gate and can be sealed by contact with the valve disc. In the closed position, the disc is in contact with the seat, forming a right angle, thus completely cutting off the fluid path and avoiding leakage. In the open position, the valve disc moves upwards and separates from the valve seat so that fluid can flow through the passage between the valve disc and the seat. Knife gate valve discs are usually cast iron or stainless steel, and seats are usually brass or stainless steel. Packing is usually used to fill the gap between the valve disc and the seat to enhance sealing performance. The drive mechanism, usually manual or electric, is used to...
There are many types of globe valves, and there are many ways to classify them. According to the sealing material, globe valves can be divided into two categories: soft seal globe valves and metal hard seal globe valves; according to the structural form of the valve flap can be divided into two categories: balanced globe valves and non-balanced globe valves; according to the form of the flow channel can be divided into DC channel, Z-shaped flow channel, annular flow channel, DC flow channel and three-way flow channel, etc. 1. Soft seal globe valve In the globe valve, in order to prevent the soft seal from heat damage, a heat sink is installed in front of the soft seal, which is composed of a metal sheet with a large heat sink surface. This design is not sufficient to prevent the soft seal from catching fire and burning if used in oxygen service and to prevent failure of this type of valve it is necessary to enlarge the inlet passage beyond the seat so that a pocket is formed at one end of the inlet passage so that the high-temperature gas collects away from the seal. When designing soft sealing surfaces,...
1. Forged steel open stem gate valve ①Flow path: GB/T 28776-2012, JB/T 7746- 2006, API602- -2015 reduced type; EN ISO 15761 :2002 Class150~Class800 through type or reduced type, Class1500 through type; JPI-7S-36 through type ②Connection of the valve body and cover: JB/T 7746- -2006, API 602-2015 flange, threaded or welded; EN ISO 15761: 2002 flange, welded; JPI-7S-36 upper threaded stem, flange, lower threaded stem, threaded ③Connecting end: JB/T 77462006, API602-2015, female thread, socket weld or flange; EN ISO 15761:2002 female thread socket weld, flange, butt weld; JPI-7S-36 female thread, socket weld ④Gate: wedge type single gate 2. Forged steel concealed stem gate valve ①Flow channel: GB/T 28776-2012, JB/T 7746—2006, API602-2015 Reducing type: EN ISO15761:2002 Class150~Class800 Through bore type or reduced type; Class1500 through bore type: JPI-7S-36 through bore type ②Connection of the valve body and cover: JB/T 7746-2006, API 602-2015 flange, threaded or welded; EN ISO 15761:2002 flange, welded; JPI-7S-36 upper threaded stem, flange, lower threaded stem, threaded ③Connecting end: JB/T 7746-2006, API 602-2015 female thread, socket weld or flange: EN ISO15761:2002 female thread socket weld flange, butt weld; JPI-7S-36 female thread, socket weld ④Gate plate: wedge type single gate plate 3. Wedge type double gate valve ①Flow...
Introduction: Butterfly valves appear to be simple devices that are easy to use, but they have a wide range of applications in the industrial world. They are used for controlling the flow of liquids and gases through pipes, reducing pressure, and creating back-pressure situations. They come in many shapes and sizes and can be found almost anywhere there is an industrial facility or manufacturing plant. Butterfly valves last anywhere from ten years to over one hundred years depending on how they are maintained, what type they are made of and how often they get used. If butterfly valves are constantly being opened and closed, then it is possible that they could break within less than ten years. However, if they aren’t being used as much or properly maintained then their life span could increase substantially without any problems experienced during this period. It varies. It’s hard to say how long a butterfly valve will last for you because it depends on what you’re using the valve for. A butterfly valve is used in many industries and is used differently depending on which industry it’s being used in. For example, if you’re using a butterfly valve to control water flow through...
What types of check valves are available? Introduction There are many different types of check valves available for a variety of applications. They all have unique features that make them ideal for specific applications. The following are the various types of valves. 1. Lift Check Valve A lift check valve belongs to a kind of automatic valve, its structure is generally composed of the valve body, valve cover, valve flap, sealing device, etc. Its main role is to prevent the backflow of media, prevent the pump and drive motor reversal, as well as release container media. Lifting check valve flap with the guide rod, the guide rod can be freely lifted in the valve cover guide hole. When the pipeline medium is in accordance with the specified direction (from left to right), the pressure below the valve flap exceeds the pressure above it, push the valve flap along the center line of the valve cover guide hole up, and the valve automatically open, so that the medium flow. If the fluid flows from right to left, that is, reverse inflow, the pressure above the valve flap is greater than the pressure below it, and the pressure difference...
