The flow control valve of pneumatic flange ball valve is mainly used in sewage treatment and drainage system, acid-base solution flow control system, and fluid control in pure water pipeline system.

Manufacturer of intelligent pneumatic flange ball valve

Pneumatic flange ball valve is a ball valve equipped with a pneumatic actuator. The execution speed of pneumatic actuators is relatively fast and does not require manual labor, which greatly saves human resources and time. Pneumatic flange ball valve evolved from globe valve. It has the same 90 degree rotation lifting action, but the difference is that the plug body is a sphere with a circular through-hole or channel passing through its axis. The ratio of the sphere to the channel opening should be such that when the sphere rotates 90 degrees, it should all appear spherical at the inlet and outlet, thereby intercepting the flow.

Classification of Pneumatic Flange Ball Valves

1、 Floating pneumatic ball valve
The ball of the stainless steel pneumatic ball valve is floating, and under the pressure of the medium, the ball can produce a certain displacement and press tightly against the sealing surface at the outlet end, ensuring the sealing of the outlet end.
The floating stainless steel pneumatic ball valve has a simple structure and good sealing performance, but the ball bears all the load of the working medium transmitted 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. This structure is widely used for medium and low pressure ball valves.
2、 Fixed ball pneumatic ball valve
The ball of the stainless steel pneumatic ball valve is fixed and does not move under pressure. Fixed ball valves are equipped with floating seats, which move when subjected to medium pressure, causing the sealing ring to press tightly against the ball to ensure sealing. Usually, bearings are installed on the upper and lower shafts of the sphere, with a small operating torque, suitable for high-pressure and large-diameter valves.
In order to reduce the operating torque of pneumatic ball valves and increase the reliability of sealing, oil sealed ball valves have emerged in recent years. They inject special lubricating oil between the sealing surfaces to form an oil film, which enhances sealing performance and reduces operating torque, making them more suitable for high-pressure and large-diameter ball valves.
3、 Elastic ball pneumatic ball valve
The ball of a pneumatic ball valve is elastic. The ball and valve seat sealing ring are both made of metal materials, and the sealing pressure ratio is very high. Relying on the pressure of the medium itself cannot meet the sealing requirements, and external force must be applied. This type of valve is suitable for high temperature and high pressure media.
An elastic sphere is obtained by creating an elastic groove at the lower end of its inner wall. When closing the channel, use the wedge-shaped head of the valve stem to expand the ball and press it against the valve seat to achieve sealing. Release the wedge-shaped head before rotating the sphere, and the sphere will return to its original shape, creating a small gap between the sphere and the valve seat, which can reduce friction and operating torque on the sealing surface.
Pneumatic ball valves can be divided into straight through, three-way, and right angle types according to their channel positions. The latter two types of ball valves are used for distributing media and changing the flow direction of media.

Operation and use of pneumatic flange ball valve

(1) Before operation, it is necessary to confirm that the pipelines and valves have been flushed.
(2) The operation of the valve is completed by driving the valve stem to rotate according to the input signal of the actuator: when it rotates forward by 1/4 turn (900), the valve closes. When rotating 1/4 turn in reverse (900), the valve opens.
(3) When the direction indicator arrow of the actuator is parallel to the pipeline, the valve is in the open state; When the arrow is perpendicular to the pipeline, the valve is in the closed state.
repair
Having a long service life and maintenance free period will depend on the following factors: normal working conditions, maintaining a harmonious temperature/pressure ratio, and reasonable corrosion data
Classification and characteristics of pneumatic three piece ball valves
Pneumatic ball valves are divided into O-type ball valves and V-type ball valves. The O-type ball valve adopts a floating structure, with a precision cast core and a hard chrome plated outer surface. The valve seat is made of reinforced polytetrafluoroethylene material, and the flow channel mouth is the same as the pipeline diameter, with extremely high flow capacity, minimal flow resistance, and no leakage when closed. It is generally used as a switch valve and is particularly suitable for high viscosity, fiber containing, and granular media; The V-shaped ball valve adopts a fixed structure, with a V-shaped notch on the ball core, which can achieve proportional adjustment, and the flow characteristics are approximately equal percentages.
According to different process equipment, pneumatic or electric actuators can be selected to form pneumatic ball valves and electric ball valves, respectively. Pneumatic ball valves require valve positioners to achieve proportional adjustment, while electric ball valves require electronic electric actuators or servo amplifiers to achieve proportional adjustment.
From a material perspective, it can be divided into carbon steel ball valves, stainless steel 304 ball valves, 316 ball valves, and copper ball valves
In terms of application, it can be divided into high-pressure ball valves and low-pressure ball valves
High pressure pneumatic ball valve: mainly used in industries such as petroleum, natural gas, hydraulic oil, engineering machinery, etc
Low pressure pneumatic ball valve: mainly used in non corrosive pipelines with media such as water!

Function of pneumatic flange ball valve

The working principle of stainless steel pneumatic ball valve is to rotate the valve to make the valve smooth or blocked. Pneumatic ball valve switches are lightweight, small in size, can be made into large diameters, reliable in sealing, simple in structure, easy to maintain, and the sealing surface and spherical surface are often in a closed state, which is not easily eroded by the medium. They are widely used in various industries.
Pneumatic flange ball valves are mainly used in pipelines for fast cutting speed, distribution, and changing the flow direction of media. Pneumatic ball valve is a new type of valve widely used in recent years, which has the following advantages:

1. The fluid resistance is small, and its resistance coefficient is equal to that of a pipe segment of the same length.
2. Simple structure, small size, and light weight.
3. Tight and reliable, plastic is widely used as the sealing surface material for ball valves with good sealing performance, and it has also been widely used in vacuum systems.
4. Easy to operate, quick opening and closing, only need to rotate 90 ° from fully open to fully closed, making it convenient for remote control.
5. Easy to maintain, the pneumatic ball valve has a simple structure, and the sealing ring is generally movable, making disassembly and replacement relatively convenient.
6. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, and when the medium passes through, it will not cause erosion of the valve sealing surface.
7. Widely applicable, with diameters ranging from a few millimeters to several meters, suitable for applications from high vacuum to high pressure.
   Pneumatic three piece ball valves have been widely used in various sectors such as petroleum, chemical, power generation, papermaking, atomic energy, aviation, rockets, as well as in people’s daily lives.