KATA VALVE API 6D VALVE PLUB VALVE NPS 8"

KATA VALVE PLUB VALVE NPS 2"~24"

Plug valves are valves with cylindrical or conically tapered "plugs" which can be rotated inside the valve body to control flow through the valve. The plugs in plug valves have one or more hollow passageways going sideways through the plug, sothat fluid can flow through the plug when the valve is open. Plug valves are simple and often economical.

Plug valves are valves with cylindrical or conically tapered "plugs" which can be rotated inside the valve body to control flow through the valve. The plugs in plug valves have one or more hollow passageways going sideways through the plug, so that fluid can flow through the plug when the valve is open. Plug valves are simple and often economical.

When the plug is conically tapered, the stem/handle is typically attached to the larger diameter end of the plug. Plug valves usually do not have bonnets but often have the end of the plug with the handle exposed or mostly exposed to the outside. In such cases, there is usually not much of a stem. The stem and handle often come in one piece, often a simple, approximately L-shaped handle attached to the end of the plug. The other end of the plug is often exposed to the outside of the valve too, but with a mechanism that retains the plug in the body.

he simplest and most common general type of plug valve is a 2-port valve with two positions: open to allow flow, and shut (closed) to stop flow. Ports are openings in the valve body through which fluid can enter or leave. The plug in this kind of valve has one passageway going through it. The ports are typically at opposite ends of the body; therefore, the plug is rotated a fourth of a full turn to change from open to shut positions. This makes this kind of plug valve a quarter-turn valve. There is often a mechanism limiting motion of the handle to a quarter turn, but not in glass stopcocks.

Slightly conically tapered metal (often brass) plug valves are often used as simple shut-off valves in household natural gas lines.

It is also possible for a plug valve to have more than two ports. In a 3-way plug valve, flow from one port could be directed to either the second or third port. A 3-way plug valve could also be designed to shift flow between ports 1 and 2, 2 and 3, or 1 and 3, and possibly even connect all three ports together. The flow-directing possibilities in multi-port plug valves are similar to the possibilities in corresponding multi-portball valves or corresponding multi-port valves with a rotor. An additional possibility in plug valves is to have one port on one side of the plug valve and two ports on the other side, with two diagonal and parallel fluid pathways inside the plug. In this case the plug can be rotated 180° to connect the port on the one side to either of the two ports on the other side.

Stopcocks used in laboratory glassware are typically forms of conically tapered plug valves. When fused with the glassware, the valve bodies are made of glass. Otherwise, they can be made of an inert plastic such asTeflon. The plugs can be made of a similar plastic or glass. When the plug is made of glass, the handle and plug are fused together in one piece out of glass. When glass is used for both the stopcock body and the plug, the contacting surfaces between them are special ground glass surfaces (see Laboratory glassware) often with stopcock grease in between. Special glass stopcocks are made for vacuum applications, such as in use with vacuum manifolds. Stopcock grease is always used in high vacuum applications to make the stopcock air-tight. Also if the plug valve is "locked" from being in the open or closed position for an extended amount of time lubricant can be added through the greaser with the valve in service.

References

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.