Check valve

The check valve is a valve that constantly maintains fluid flow in a constant direction and prevents reverse flow. The disc is pushed open by the fluid pressure, but when it flows backward, the disc is brought into close contact with the seat of the body by the back pressure to prevent backflow. There are three typical types of check valves (swing check valve, lift check valve, and wafer check valve). Class Product code 1½ 2 2½ 3 4 5 6 8 10 12 14 16 18 Stainless 150 150UOCH ○ ○ ○ ○ ○ ○ ○ ○ △ △ △ 300 300UOCH ○ ○ ○ ○ ○ ○ ○ △ △ 600 600UOCH ○ ○ ○ ○ ○ ○ ○ Cast Steel 150 150SCOHS ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 300 300SCOHS ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ 600 600SCOHS ○ ○ ○ ○ ○ ○ ○ ○ △：Please contact KITZ （24 MB） Lift check valve Water hammer reduction The independent spring mechanism is an impact-absorbing check valve that suddenly closes immediately before reverse flow of fluid and reduces water hammer generation. This valve protects piping equipment such as pumps. Pump can be mounted directly The pump can now be mounted directly on the disc by adjusting the opening of the disc appropriately and changing the national method for inserting the pin of the disc and the pin to improve durability. *Stainless steel copper products have a different structure, so they cannot be directly connected to the pump. Secure a straight pipe section with a 2D or more (or a 3D or more if there is a 2-size expansion in the pump discharge) in front of and behind the product. KITZ wafer catch valve is an impact...

Check valves, or one-way valves, are designed to stop backflow and, ultimately, to protect pumps and compressors. They are available in several styles and sizes, from 1/8 inch to as large as may be required. Check valves are found in many industries and with various applications ranging from municipal water to mining and natural gas. The three most common types are swing check valves, double-door check valves and silent spring-assisted axial flow check valves. Image 1. Swing check valve ( Images courtesy of Triangle Fluid Controls Ltd.) Swing Check Valve This is probably the most common check valve in use today and is a full-port design, meaning the disc, when fully open, is out of the flow stream. This style of check valve is a good choice in applications that have a high percentage of solids and a lower on/off cycle count. Due to the travel distance of the disc, swing check valves close slowly. This causes the last push of reverse flow to slam the disc closed, resulting in a huge pressure spike, causing water hammer. Water hammer is a pressure surge when a fluid in motion is forced to stop or change direction suddenly, causing a pressure wave in the pipe. This pressure wave can cause major problems from noise and vibration to pipe collapse. Image 2. Double-door check valve Double-Door Check Valve This valve is similar to the swing check and a little better in terms of closing because of the coiled springs that assist the two cantilevered doors in closing more quickly. It...

Swagelok ® Check Valves Swagelok check valves come in a broad range of adjustable and fixed cracking pressures to control back flow in general-service and high-purity applications. Excess flow valves will stop the release of excess flow downstream, enhancing system integrity and safety. • • • • Check Valves Check and Excess Flow Valves Check Valves Check valves are designed to allow fluids to flow in one direction only and are rated for use in medium- and high-pressure applications. Swagelok check valves come in a variety of designs, including spring and poppet, lift, and all-welded high-purity for use in a range of situations. XS Series Excess Flow Valves XS series valves have a slotted poppet which moves to the tripped position when excess flow occurs downstream, then resets when pressure equalizes. They eliminate the need for a complex bypass mechanism while reducing maintenance time.

• Menu Toggle • Guest Posts Guidelines • Submit Guest Post Form • Submit Banner Ads Form • Menu Toggle • Heat Pump • Ventilation • Air Conditioning Menu Toggle • Cooling Tower • Menu Toggle • Industrial Valves • Menu Toggle • Electric Generator • Heavy Duty Generator Menu Toggle • AC Generator • Biogas Generator • Diesel Generator • Induction Generators • Industrial Generator Menu Toggle • 3 Phase Generator • Biodiesel Generator • Dual Fuel Generator • Propane Generators • Inverter Generator • Standby Generators Menu Toggle • Portable Generators Menu Toggle • DC Generator • Gasoline Generator • RV Generators • Single Phase Generator • Ozone Generator • Quiet Generators • Solar Generator • Steam Generators • Synchronous Generator • Whole House Generators • Menu Toggle • General Compressor • Air Compressor • Air Cooled Compressor • Centrifugal Compressor • Reciprocating Compressor • Rotary Vane Compressor • Screw Compressor • Water Cooled Compressor • Menu Toggle • Industrial Gearbox • Menu Toggle • Gas Turbine • Hydro Turbine • Steam Turbine • Wind Turbine • • • Menu Toggle • Alternator • Covid-19 • Coupling • Engine • Electrical Component • Renewable Energy • Rotor • Pipe • Warehouse Menu Toggle • Warehouse Equipment and Supplies • Warehouse Equipment for Sale • Warehouse Equipment and Supplies Companies • Warehouse Equipment Products Check valves are found in almost every industrial application acting as one-way or non-return valves. Check valves are simple devices that p...

Subsea check valves Karan Sotoodeh, in Subsea Valves and Actuators for the Oil and Gas Industry, 2021 Abstract Check valves are one-way or nonreturn valves that open with fluid movement and pressure, and close to prevent backflow of the pressure to upstream equipment such as pumps and compressors. In fact, check valves allow the fluid to flow in only one direction. Water hammering and slamming is one of the operational problems associated with some types of check valves which are explained in this chapter. Different types of check valves such as swing check valve, nonslam axial check valve, piston check valves are explained in this chapter. Additionally, different components of a check valve such as body, cover, as well as internals are explained in this chapter. The advantages of axial check valves as a robust and advanced type check valve have been discussed in this chapter. Read more Check valves are normally in the close position and open when the fluid flows through it. It also has the capability of shutting off the flow in the event the pressure downstream exceeds the upstream pressure. In this respect, it is used for flow in one direction only. Thus it prevents backflow through the valve. Because flow of the fluid through the valve is allowed to be in one direction only, check valves must be installed properly by noting the normal direction of flow. An arrow stamped on the outside of the valve body indicates the direction of flow. Check valves may be classified as s...