2007年5月20日星期日
Research valve in Baiwei company
On this Saterday, my classmates and me went to Baiwei company to reaearch valve ! We are enjoy myself in this reseach ! We can know how to made valve and how to order the products in website. We all know that the valve which made in Baiwei are very good !
2007年5月10日星期四
Plug valve
Plug valve also called cock or stop-cock valves, date back to ancient times, where they were developed for use in citywide Roman plumbing systems. Today, they remain one of the most widely used valves for both on/off and throttling services. Their design is fairly simple; the body is comprised of three main parts: body, cover and plug. The plug is a cylindrical, tapered, or generally cone-shaped device that can be raised or lowered within the seat to maintain, restrict or completely shut off flow. The valve is opened by rotation, with the plug itself being the only element that is capable of movement. Early models of plug valves used metal-to-metal seals that were nonlubricated. This design is still used, but problems with galling and sticking limit their usefulness. The use of lubricant between the plug face and the seat eliminates most of these problems. The lubricant helps to control leakage around the plug, reduces wear between the valve contact surfaces, and slightly lifts the plug to reduce the operating torque required to operate the valve. We are one of the biggest Plug Valves manufacturer in China. We supplies :Sleeve Type Soft Sealing Plug Valve, Connection Lift Plug Valve, Orbit Plug Valve, We can manufacture and supply Plug Valves according to your requirements，please feel free to contact us !
Check valve
Check valve are generally used in drip irrigation emitters and irrigation sprinklers. Composition disc valves are ideal for applications involving gritty liquids. A clapper valve is a type of check valve which is used in fire fighting. Poppet check valves find use in “macro” flow applications. Arterial check valves are used in applications requiring centrifugal pumps to prevent retrograde flow along the arterial line. Check Valves are mechanical valves that permit gases and liquids to flow in only one direction, preventing process flow from reversing. They are classified as one-way directional valves. Fluid flow in the desired direction opens the valve, while backflow forces the valve closed. The mechanics of check valve operation are not complicated. Most check valves contain a ball that sits freely above the seat, which has only one through hole.
The ball has a slightly larger diameter than that of the through hole. When the pressure behind the seat exceeds that above the ball, liquid is allowed to flow through the valve. But once the pressure above the ball exceeds the pressure below the seat, the ball returns to rest in the seat, forming a seal that prevents backflow.We are one of the biggest Check Valves manufacturer in China. We supplies :Cast Steel Check Valve, Forged Steel Check Valve, Flanged End Check Valve ,We can manufacture and supply Check Valves according to your requirements, please feel free to contact us !
The ball has a slightly larger diameter than that of the through hole. When the pressure behind the seat exceeds that above the ball, liquid is allowed to flow through the valve. But once the pressure above the ball exceeds the pressure below the seat, the ball returns to rest in the seat, forming a seal that prevents backflow.We are one of the biggest Check Valves manufacturer in China. We supplies :Cast Steel Check Valve, Forged Steel Check Valve, Flanged End Check Valve ,We can manufacture and supply Check Valves according to your requirements, please feel free to contact us !
2007年5月6日星期日
lvGate valve
lvGate valve are advantageous in applications involving slurries, as their “gates” can cut right through the slurry. They are also used in applications that involve viscous liquids such as heavy oils, light grease, varnish, molasses, honey, cream and other non-flammable viscous liquids. They are available in large sizes to better handle thick flow. However, Gate Valves do have low-pressure limitations, and are not optimal in applications that require cleanliness or sanitary conditions. They are excellent for use anywhere a shutoff valve is needed. They can also be used where throttling capabilities are desired, although this is not generally recommended as erosion of the seat and disc occurs due to the vibrations of the disk in throttling applications.We are one of the biggest Gate Valves manufacturer in China. We supplies :Cast Steel Gate Valve、Forged Steel Gate Valve, Resilient seated gate valve, Flanged End Gate Valve etc, We can manufacture and supply Gate Valves according to your requirements，please contact us !
Butterfly valve
Butterfly valve
Butterfly valve may include a pressure-tight resilient seat and an angularly offset disc. Butterfly valve designs use a hard seat and an O-ring or piston ring around the disk to seal. Butterfly valves range in size from small to enormous, and are well suited for large flows of gases, liquids, or slurries, offer a number of advantages when used for the proper application. They may be used in a wide variety of chemical services, they are available with small dimensions allowing for use in areas where space is limited, and they allow a high coefficient of flow. Conversely, the design of butterfly valve creates the disadvantage of not being easy to clean, and therefore should be avoided in situations that call for sterile, medical or food processing applications. Additionally, some styles may have difficulty dispensing slurries. We can manufacture and supply Butterfly valves ccording to your requirements, Please feel free to contact us!
Butterfly valve may include a pressure-tight resilient seat and an angularly offset disc. Butterfly valve designs use a hard seat and an O-ring or piston ring around the disk to seal. Butterfly valves range in size from small to enormous, and are well suited for large flows of gases, liquids, or slurries, offer a number of advantages when used for the proper application. They may be used in a wide variety of chemical services, they are available with small dimensions allowing for use in areas where space is limited, and they allow a high coefficient of flow. Conversely, the design of butterfly valve creates the disadvantage of not being easy to clean, and therefore should be avoided in situations that call for sterile, medical or food processing applications. Additionally, some styles may have difficulty dispensing slurries. We can manufacture and supply Butterfly valves ccording to your requirements, Please feel free to contact us!
Hydraulic control valve
Hydraulic control valve
Hydraulic control valve as used in industrial applications are built in several pressure ranges. The majority of present applications are in the range of 0 to 1500 lb per sq in., but the trend is toward higher pressures. Various types of valves are used in hydraulic systems to control or regulate the flow medium. Hydraulic valves contain and transfer the flow and pressure of hydraulic fluid in hydraulic power systems. They range from simple shutoff valves to precision control valves. Common types of hydraulic valves include angle, ball, block and bleed, check, control, cartridge, directional, drain, needle, poppet, pressure relief, safety, shut off, solenoid, spool, and stack mounted valves. In their unpowered state, hydraulic valves can be normally open (open center) or normally closed (closed center). Hydraulic control valves with a tandem center connect the pressure and tank ports, but block the service ports to allow system unloading and isolation of the service lines. Devices with a float center allow the supply to be shut off and enable the load to move to other services. We can manufacture and supply Hydraulic control valves according to your requirements，please feel free to contact us !
http://www.cgvalve.com/Hydraulic-control-valve.html
Hydraulic control valve as used in industrial applications are built in several pressure ranges. The majority of present applications are in the range of 0 to 1500 lb per sq in., but the trend is toward higher pressures. Various types of valves are used in hydraulic systems to control or regulate the flow medium. Hydraulic valves contain and transfer the flow and pressure of hydraulic fluid in hydraulic power systems. They range from simple shutoff valves to precision control valves. Common types of hydraulic valves include angle, ball, block and bleed, check, control, cartridge, directional, drain, needle, poppet, pressure relief, safety, shut off, solenoid, spool, and stack mounted valves. In their unpowered state, hydraulic valves can be normally open (open center) or normally closed (closed center). Hydraulic control valves with a tandem center connect the pressure and tank ports, but block the service ports to allow system unloading and isolation of the service lines. Devices with a float center allow the supply to be shut off and enable the load to move to other services. We can manufacture and supply Hydraulic control valves according to your requirements，please feel free to contact us !
http://www.cgvalve.com/Hydraulic-control-valve.html
Forged Steel Valve
Forged Steel Valve
Forged Steel Valve are used in Oil Refining and other industrial applications where forged steel material is required. higher pressures and temperatures are involved and the line size is generally under 2-1/2”. Other factors could also favor the selection of forged steel, such as system requirements for socket-weld piping and compatibility of media. We are one of the biggest Forged Steel Valves manufacturer in China. We supplies :Forged Steel Gate Valve、Forged Steel Globe Valve, Forged Steel Check Valve, Forged Steel Y-Pattern Valve, Forged Steel Bellow Sealed Valve etc, We can manufacture and supply Forged Steel Valves according to your requirements, please feel free to contact us !
http://www.cgvalve.com/Forged-Steel-Valve.html
Forged Steel Valve are used in Oil Refining and other industrial applications where forged steel material is required. higher pressures and temperatures are involved and the line size is generally under 2-1/2”. Other factors could also favor the selection of forged steel, such as system requirements for socket-weld piping and compatibility of media. We are one of the biggest Forged Steel Valves manufacturer in China. We supplies :Forged Steel Gate Valve、Forged Steel Globe Valve, Forged Steel Check Valve, Forged Steel Y-Pattern Valve, Forged Steel Bellow Sealed Valve etc, We can manufacture and supply Forged Steel Valves according to your requirements, please feel free to contact us !
http://www.cgvalve.com/Forged-Steel-Valve.html
Cast Steel Valve
Cast Steel Valve
Cast Steel Valve are generally used on line size over 2 when higher pressures and temperatures demand the use of carbon or alloy steel, cast steel valves are designed and manufactured to satisfy strict requirements in order to prevent external leakage and to meet fugitive emission requirements of most customers. Stuffing box finishes of 63 to 125 RMS, stem finished of 16 to 32 RMS control of staginess and concentricity of stems, and controlled diametrical clearances between stem and gland, stem and backseat, and gland and stuffing box, all combine to guarantee consistent performance of stem seals. Gasket surfaces between bodies and bonnets are strictly controlled to fines guarantee consistent sealing in gaskets areas.We can manufacture and supply Cast Steel Valves according to your requirementsplease contact us !
http://www.cgvalve.com/cast-steel-valve.html
Cast Steel Valve are generally used on line size over 2 when higher pressures and temperatures demand the use of carbon or alloy steel, cast steel valves are designed and manufactured to satisfy strict requirements in order to prevent external leakage and to meet fugitive emission requirements of most customers. Stuffing box finishes of 63 to 125 RMS, stem finished of 16 to 32 RMS control of staginess and concentricity of stems, and controlled diametrical clearances between stem and gland, stem and backseat, and gland and stuffing box, all combine to guarantee consistent performance of stem seals. Gasket surfaces between bodies and bonnets are strictly controlled to fines guarantee consistent sealing in gaskets areas.We can manufacture and supply Cast Steel Valves according to your requirementsplease contact us !
http://www.cgvalve.com/cast-steel-valve.html
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