Socket Welding Pressure Seal Swing Check Valve

Electric Actuator CF8C CN7M CF3M Bellow Seal Globe Valve NPS2"-12" Class 150-600LB

Standards

A check valve, clack valve, non-return valve or one-way valve is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items. Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.

An important concept in check valves is the cracking pressure which is the minimum upstream pressure at which the valve will operate. Typically the check valve is designed for and can therefore be specified for a specific cracking pressure.

Heart valves are essentially inlet and outlet check valves for the heart ventricles, since the ventricles act as pumps.

A swing check valve or tilting disc check valve is check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle. Although swing check valves can come in various sizes, large check valves are often swing check valves. The flapper valve in a flush-toilet mechanism is an example of this type of valve. Tank pressure holding it closed is overcome by manual lift of the flapper. It then remains open until the tank drains and the flapper falls due to gravity. Another variation of this mechanism is the clapper valve, used in applications such firefighting and fire life safety systems. A hinged gate only remains open in the inflowing direction. The clapper valve often also has a spring that keeps the gate shut when there is no forward pressure. Another example is the backwater valve (for sanitary drainage system) that protects against flooding caused by return flow of sewage waters. Such risk occurs most often in sanitary drainage systems connected to combined sewerage systems and in rainwater drainage systems. It may be caused by intense rainfall, thaw or flood.

Kata Valve (Group) Co.,Ltd. is headquartered at Baoshan City Industrial Zone,Shanghai China, occupying over 35 thousands square meters and will be looking at other expansions in the near future. The registration capital of the whole Group comes to RMB 100 Millions. Also it is one of high-tech enterprises in Shanghai, a member of the Association of China General Machinery, and a regular supplier to China Petroleum & Natural Gas Corp,China Petrochemical,China Power,and China Sea Oil etc.

With an experience of about 30 years in manufacturing all kinds of valves,Kata specializes in disigning, making and marketing valves for all industries. Its products range from Ball, Butterfly, Gate, Globe,Check,Plug valves to Marine valves and other valves;nominal size from 1/2" to 48" (DN15 to DN1200);nominal pressure from 150Lb to 2500Lb (PN1.0Mpa to PN42.0Mpa); materials cover WCB, WCC, WC6, WC9, CF8, CF3, CF8m, CF3M, LCB, LCC, A105, 304, 316, 304L, 316L, F11, F22, LF2, F51, etc. The products are widely used in the fields of petroleum, chemical, metallurgy, power, fuel gas, city pipeline networks and so on. Certificated with ISO9001, API6D, CE/ PED, Kaitai has developed excellent quality control and management system.

Kata has a series of modern machines and equipments such as vertical lathes, drill press, milling lathe, grinding machine , other general machine tools and physical & chemical analysis & experiment devices. Also it has developed a well-trained and dedicated team including engineers,technicians and other employees. This allows us to offer customers quality product,competitive pricing and prompt deliveries. We always work hard to improve our existing products and pursue new ideas and ways to stay ahead of the ever changing market.