Product Description

API6D High-performance pipeline ball valve is Raymond(RMD)hightech products,as switch control equipment,it is mainly used in natural gas,oil,gas,liquefied natural gas pipeline transmission system and other industries,its anti-sulfur products containing hydrogen sulphide,impurities and high corrosion are suitable for the long-distance natural gas pipeline.
 

Main features

Body of high-performance pipeline ball valve is forged structure.The connection type for body and vice-body can be BB(bolted connection)and WB(welded connection).The WB(welded connection)and the LWB(Fully-welded extended stem)structure isadopted for buried ball valves,as shown below.

High performance pipeline ball valve series has the feature of strength,high perfect sealing,maintenance-free,long life and so on.The production of this series ball valve adopts the international advanced ball valve design and manufacturing technology,selects high-quality materials in accordance with the standard selection of materials and combines with advanced materials forming forging technology.At the same time,with the years of ball valve design and manufacturing experience,the use of advanced processing and manufacturing equipment and production and processing technology,through the first-class inspection and testing equipment and instruments,perfect quality assurance management system and excellence in the production of high-performance philosophy can ensure the quality of valves.This series of valve has the performance of a high strength,defect-free forging body,excellent sealing performance,even at maximum pressure difference(full pressure),it will still be able to ensure that seal without leakage,after frequent switching action to realize a safe usage in the transportation of oil,natural gas,coal gas,and other special medium transportation pipeline.

                                    

The special structure of valve seat seal

Floating structure means seat reciprocally can move along channel direction,so as to guarantee the ball and seat are tightly sealed.

(Ⅰ)Valve seat structure suitable for different occasions and sealing requirements

Valve seat can be designed as a standard single-piston effect and specific dual piston effect,Figure1 shows single-piston effect-inletside seal;Figure2 shows Dual Piston effect-outlet-side seal;Figure3 shows special dual piston effect sealing structure

(Ⅱ)Multi-level structure of the valve seat seal

As shown in Figure4,there are two elastic O-ring in the valve seat ring-ring A and ring B.Sealing ring A spring-loaded through the valve seat so that the sealing surface of sealing ring A tightly fit with ball surface to form an initial seal.When there is pressure in the system medium,the piston force

produced by the piston force produced by the piston effect of size difference makes elastic deformation of the ring A Ershi sealing surface and ball more closely fit the surface to form a re-sealing;meanwhile,due to ring A in the medium resulted in elastic deformation under pressure so that the sealing ring B is also closely fit the surface of ball for the formation of the second stage seal.When the system medium pressure increasing,it will have an enormous pressure in the valve seat ring A and ring B,so that the two seals have a greater elastic deformation,and then the metal valve seat ring surface and the ball surface sealing together to form a third level of metal to metal seal.

(Ⅲ)The assisted valve seat sealing equipment

Based on the actual service condition,medium requirement,sealing requirement,etc.,the assisted valve sealing equipment will be considered to be necessary or not.The assisted valve sealing equipment is a one-way valve installed outside of valve body that can prevent medium leakage and can inject sealing grease into valve body by external force.When the assisted valve seat sealing equipment is required,valve seat ring shall be design and processed with injection grove and hole to connect the assisted valve seat sealing equipments.Such equipment can prevent the medium by the sealing of injection of rease.Refer to Figure5 for reference.