Other Devices

A: Different types of check valves differ in their application and performance based on their design and operational mechanism. Swing check valves are suitable for horizontal pipelines with moderate flow rates and offer low resistance to flow, while ball check valves are ideal for quick response applications and can handle contaminated fluids. Lift check valves provide reliable seals for high-pressure and gas systems but may cause more pressure drops. Each type, including diaphragm, wafer, in-line, and tilting disc check valves, has unique advantages and disadvantages, making the choice dependent on factors such as fluid type, pressure conditions, and installation constraints.

A: When installing and maintaining check valves, it is crucial to ensure proper selection and sizing based on pipe size, media compatibility, and flow rate to prevent inefficiencies and premature wear. The check valve should be positioned with adequate distance from other components to minimize turbulence, and installed according to the indicated flow direction. The pipes and valve must be clean and free of debris. Regular inspections for wear and damage are necessary to maintain optimal performance. Considering these factors helps leverage the advantages of check valves while mitigating issues like pressure drop and water hammer.

A: If you give us the chassis number or the parts photos, we can provide the correct parts you needed.

A: Yes, of course. As you know, one truck has thousands of parts so that we can't show all of them. Just tell us more details, we'll find them for you.

A: 30% T/T in advance, 70% balance before shipment.

A: Most of parts are available in storage. So can delivery in 2 days after payment. For the ones no storage, can delivery in 7 days. For container delivery, one container.

A: A metal disc pivots on a hinge or trunnion to prevent reverse flow. Most larger-scale check valves use this design due to their simplicity. With a life span of five to seven years, these valves are often a component that needs to be replaced frequently.

A: You'll need to take the valve out and disassemble it to look for debris and scratches. Wash all the parts with hydraulic fluid or whatever fluid is used in your pipe system. Check the housing for corrosion, damage or a rough surface. Buffing can help take care of rough surfaces.

A: Check valves are used in many different applications. For instance, they are often placed on the outlet side of pumps to safeguard against backflow. Centrifugal pumps, which are commonly used in water supply systems, are not self-priming, so check valves are essential for keeping water in the pipelines.

A: The most common reason a check valve chatters is turbulence. Very often the turbulence is caused because the check valve is installed too close to the discharge of a pump or is just downstream of an elbow or some other turbulence causing device.

A: A normally open check valve allows the medium to flow freely but shuts off the flow in case of backflow. A normally closed check valve prevents the flow of media through it until the cracking pressure builds up, at which point the valve opens.

A: The differential pressure between the outlet and inlet, at which no flow is passing through the valve. Maximum allowable back pressure is rated to 1000 psi (69 bar) for 1/4, 200 psi (14 bar) for 3/8 to 1".