The electric flanged ball valve is a ball valve coupled with an electric actuator, which is relatively fast and does not require workers to work hand in hand, saving manpower and time to a large extent.
Development and working principle of electric flanged ball valve
The electric flanged ball valve is having the same rotation 90 degree lift action, with a circular through hole or passage through its axis. The proportion of the spherical and the channel should be such that when the ball rotates 90 degrees, the entrance and exit should be spherical, so as to cut off the flow.
The electric flanged ball valve requires only 90 degrees of rotation of the air and a small turning torque that can be closed tightly. The fully equal body cavity provides a very small, straight passage for the medium. It is generally believed that the ball valve is most suitable for direct opening and closing use, but the recent development of the ball valve has been designed so that it has a throttle and control the flow of use. The main features of the ball valve itself is compact, easy to operate and repair, suitable for water, solvents, acids and natural gas and other general working medium, but also for poor working conditions such as oxygen, hydrogen peroxide, methane and ethylene. Ball valve body can be the whole, it can be modular.
First, the characteristics and use of electric flanged ball valve
The ball valve is mainly used for cutting off or connected to the medium in the pipeline, can also be used for fluid regulation and control, compared with other valves, with the following advantages.
1, the fluid resistance is small, the ball valve is the valve in all the smallest resistance of a fluid, even the reduced diameter ball valve, the fluid resistance is quite small.
2, thrust bearing to reduce the stem friction torque, the stem can be long-term operation smooth and flexible.
3, the valve seat sealing performance is good, the use of PTFE and other elastic materials made of seals, the structure is easy to seal, and the ball valve sealing capacity increases with the media pressure increases.
4, stem seal is reliable, because the stem is only imitation and movement without lifting movements, stem packing seal is not easy to damage, and the sealing capacity increases with the pressure of the medium increases.
5, due to PTFE and other materials with good self-lubricating, and the ball friction loss is small, so the long life of the ball valve.
6, the lower part of the stem and stem stem to prevent the stem stem spray, such as fire caused by stem seal damage, convex and the valve body can also form a metal contact to ensure that the stem seal.
7, anti-static function: in the sphere, stem, between the valve body set the spring, the switch can produce static electricity derived.
Second, the electric flanged ball valve actuator
The new series of GT-type pneumatic actuators, double acting and single acting (spring reset), rack and pinion drive, safe and reliable; large diameter valve with a series of AW-type pneumatic actuators pull fork drive, reasonable structure, the output torque Large, double acting and single acting.
1, gear-type double piston, the output torque, small size.
2, the choice of aluminum alloy cylinder material, light weight, beautiful appearance.
3, can be installed at the top, the bottom of the manual operating mechanism.
4, rack-type connection can adjust the opening angle, rated flow.
5, the actuator optional signal feedback instructions and various accessories to achieve automatic operation.
6, IS05211 standard connection for the installation and replacement of the product provides a convenient.
7, the two ends of the adjustable section of the screw can make the standard products in 0 ° and 90 ° with ± 4 ° adjustable range. To ensure synchronization accuracy with the valve.
The following accessories can be selected according to different controls and requirements:
Cut off accessories: single solenoid valve, double solenoid valve, limit switch switch.
Adjustable accessories: electrical positioner, pneumatic positioner, electrical converter.
Air handling accessories: air filter pressure relief valve, air handling three pieces.
Manual mechanism: HVSD manual
Third, the implementation of electric flanged ball valve standards
1, design and manufacture: GB12237-89, API608, API 6D, JPI 7S-48, BS5351, DIN3357.
2, flange size: JB / T74 ~ 90 (JB74 ~ 90), GB9112 ~ 9131, HGJ44 ~ 76, SH3406, ANSI B16.5, JIS B2212 ~ 2214, NF E29-211, DIN2543.
3, structural length: GB12221-89, ANSI B16.10, JIS B2002, NF E29-305, DIN3202.
4, test the main test: JB / T 9092, API 598.
Fourth, Q641 pneumatic adjustment ball valve performance specifications
Nominal diameter mm DN15-DN300
Material code C P R
Main Parts Body WCB ZG1Cr18 Ni9Ti ZG1Cr18Ni 12Mo2Ti
Sphere 2Cr13 1Cr18Ni9Ti 1Cr18Ni12MoTi
Stem 2Cr13 1Cr18Ni9Ti 1Cr18Ni12MoTi
Sealing ring reinforced polytetrafluoroethylene para-polystyrene metal seal
Filler PTFE flexible graphite
Applicable conditions Applicable medium Steam, water, oil Nitric acid Acetic acid
Applicable temperature -28 ℃ – 300 ℃
Actuator models DA / SR series, GTD / GTE series, QGSY series.
Source: China Ball Valve Manufacturer – Yaang Pipe Industry Co., Limited (www.yaang.com)