Floating ball VS Trunnion ball

loating ball valve 

The ball of the ball valve is floating, under the pressure of the medium, the ball can produce a certain displacement and pressed on the end of the sealing surface, to ensure that the end of the export seal. The floating ball valve has a simple structure and good sealing, but the ball bears all the load of working medium to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring material can withstand the working load of the ball medium. When impacted by higher pressure, the ball may be offset.This structure is generally used for low and medium pressure ball valves.Ball valve itself is the main characteristics of compact structure, reliable sealing, simple structure, convenient maintenance, sealing surface and the spherical often in the closed state, not easily be medium erosion, easy operation and maintenance, applicable to water, solvent, acid and gas, such as general work medium, but also is suitable for the working conditions of media, such as oxygen, hydrogen peroxide, methane and ethylene, widely used in various fields.The ball valve body may be integral or modular. The product features

1, in a variety of valves, the flow resistance of the ball valve is the least, when the full diameter ball valve is opened, the ball channel, valve body channel and connection pipe diameter is equal and into a diameter, the medium can flow through almost without loss 2. The ball valve can be fully closed and fully opened by rotating 90°, with quick opening and closing.Compared with gate valves and globe valves of the same specifications, ball valves are small in size and light in weight, facilitating pipeline installation 3, advanced seat: many years of ball valve manufacturing experience and the design of the seat, ensure the valve seal, low friction coefficient, small operating torque, a variety of seat materials, wide range of adaptability. 4. Handle with correct switch: flat head stem is adopted to ensure that the connection with the handle will not be misaligned, so as to ensure that the switch state indicated by the handle is consistent with the valve. 5. Locking device: To prevent incorrect operation of the valve switch, there are locking holes in the fully open and fully closed position of the valve to ensure that the valve is in the correct position. 6. Anti-flying structure of the valve stem: the stem is of lower mounting type to prevent it from flying out under pressure. At the same time, it can form metal contact with the valve body after fire to ensure the stem seal. 7. The ball valve USES a ball with a round through hole as the opening and closing part. Driven by the valve stem, the ball rotates around the center of the valve stem for 0-90 degrees to complete the opening and closing function;It has the characteristics of compact switch, turn 90 degrees, you can close the valve, cut off the pipeline media;The diameter of the sphere channel is the same as that of the pipeline, with small flow resistance and large flow capacity;The stem is of lower mounting type, which eliminates the occurrence of accidents through the stem and ensures the safety of use.

Suitable medium: water, gas, oil, natural gas and caustic medium. Applicable temperature: -1 96 ~ 350℃ Driving mode: manual, pneumatic, electric, hydraulic, etc. Nominal size: DN 15-250 1/2″ ~ 10

Trunnion ball valve 

Trunnion ball valve, is a new generation of high-performance ball valve, suitable for long distance pipeline and general industrial pipeline, its strength, safety, resistance to harsh environment and other special considerations in the design, suitable for a variety of corrosive and non-corrosive media.Compared with the floating ball valve, it works, the fluid pressure in front of the sphere of all is passed to the bearing force, will not make a sphere to the seat to move, so the seat will not bear too much pressure, so the fixed ball valve torque is small, the seat of the small deformation, stable sealing performance, long service life, applicable to high pressure, big diameter.Advanced spring pre-seat assembly with self-tightening features for upstream sealing.Each valve has two seats and can be sealed in each direction, so the installation has no flow restriction and is two-way.This valve is generally installed horizontally.The fixing ball valve has two block type and three block type body structure, the middle flange is bolted, the seal is made of reinforced teflon embedded in the stainless steel ring, there is no spring at the back of the ring to ensure the seat is close to the ball, keep the seal.There is no PTFE bearing on the upper and lower stem to reduce friction and save effort in operation. There is no adjusting plate at the bottom of the shaft to ensure the connection between ball and seal ring.Full size: The valve flow aperture is the same as the inside diameter of the pipeline for cleaning. Fixed ball valve suitable for media: water, gas, oil, natural gas and alkali corrosive media. Applicable temperature: -196 ~ 350℃, Driving mode: manual, worm gear, pneumatic, electric, hydraulic, etc. Fixed ball valve product features

1. Labor-saving operation: the ball is supported by upper and lower bearings to reduce friction and eliminate the excessive torque caused by the huge sealing load between the ball and the sealing seat caused by the inlet pressure.2. Reliable sealing performance: PTFE single-sex material sealing ring is embedded in the stainless steel seat. The rear end of the metal seat is provided with a spring to ensure sufficient pre-tightening force of the sealing ring. 3, the structure of the fire prevention: to prevent because of heat or fire, make ptfe sealing ring burned, larger leakage occurs, and feeds the fire, set up fire prevention sealing ring between the sphere and valve seat, burned down in sealing ring, in under the action of spring force, the seat ring is rapidly to the sphere, form the metal to metal seal, have a certain degree of sealing effect.Fire resistance test meets APl6FA and APl607 standards. 4. Self-actuating pressure relief function: When the pressure of stagnant medium in the valve cavity rises abnormally and exceeds the pre-tightening force of the spring, the valve seat falls back from the ball to achieve the effect of self-actuating pressure relief, and the seat is self-actuating reset after pressure relief.5. Discharge line: the discharge hole L is arranged in both upper and lower parts of the valve body to check whether the valve seat is leaking. During work, when the valve is fully open or fully closed, the pressure in the middle chamber can be removed and the packing can be directly replaced.It can discharge the entrapment and reduce the pollution of medium to the valve.Fixed ball valve is widely used in food, medicine, petroleum, chemical industry, natural gas, steel, environmental protection, paper and other transportation pipeline medium cut off or circulation.The sealing surface can also be cleaned by injecting corresponding cleaning agent or lubricant into the device.