Electric fixed ball valve adopts three-part ball valve connection, the valve body in the two seat parts along the vertical section of the axis of the valve channel is divided into three parts, the whole valve along the stem center axis symmetry, it is mainly used in the pipeline to cut off, distribution and change the direction of media flow. Its large pivot structure ensures the accurate center position of the ball under high pressure, to ensure the good operating performance of the valve; The standard valve seat adopts spring structure to push the valve seat to the ball to ensure good two-way sealing performance; Using its own discharge valve, the valve body cavity can be discharged outward; Pivot adopts anti-blowout protection structure to effectively prevent leakage; Bearing with low friction coefficient minimizes torque and facilitates valve opening and closing; The effective contact between the stem and the valve body makes the antistatic grounding device superior in performance. It has the advantages of excellent performance, high reliability, wide use and reasonable price. Suitable for: chemical industry, petroleum, natural gas, metallurgy, and other industries and long distance gas pipeline containing hydrogen sulfide medium, impurities, serious corrosion.
KDt643Y Pneumatic piston type gas quick cut butterfly valve product introduction
With the rapid development of our national economy, electric power industry becomes the pillar industry of our country. In thermal power plant, the steam turbine generator set is the key equipment in the heart position.
Fast cut butterfly valve, mainly used in steam turbine exhaust pipe, blast furnace gas residual pressure power plant (TRT), metallurgy and mining industry and other high safety grade system. In order to prevent the steam turbine unit in the sudden load dump in the steam turbine pressure suddenly reduced, the exhaust pipe and each heater steam into the steam turbine caused by the sudden reverse operation of the steam turbine blade is rotating at a high speed of more than 3000 RPM, resulting in the turbine blade break, damage to the steam turbine generator vicious accident, the valve is used for emergency cut off, in the system crisis situation, It can implement emergency closing valve internally to realize reliable cut-off of pipeline. Or in the metallurgical industry to the fast closing of the gas pipeline, or in the coal industry, prevent gas and other dangerous gas explosion of the Gao 'an plant to the equipment quickly closed or opened.
The electric ventilated butterfly valve is processed into a sealing ring with the same material as the valve body and is driven by electricity or air. Its applicable temperature with the valve body material selection, nominal pressure ~<0.6MPa, generally suitable for industrial, metallurgy, environmental protection and other pipes for ventilation adjustment medium flow.
The main characteristics of electric ventilated butterfly valve are:
1. Novel design, reasonable, unique structure, light weight, fast opening and closing.
2. Small operating torque, convenient operation, labor-saving dexterity.
3, the use of suitable materials to meet the low, medium and high temperature of different media and corrosive media.
Electric ventilated butterfly valve adopts standard
Design standard: GB/T12238-1 989 JB/T8692-1998
Flange connection size: GB/T9115.1-2000
Structure length: GB/T1222.1989
Pressure test: GB/T13927-1992; JB/T9092-1999
Working principle and use of the product:
T967Y electric regulating valve is composed of electric actuator and regulating valve two parts. The input of electric regulator is the DC current signal sent by the regulator, which is amplified by the servo amplifier to drive the actuator, generate axial thrust, drive the regulating valve, and thus cause the change of the medium flow to adjust various parameters in the system. At the same time, the actuator sends out a valve position signal for the servo amplifier comparison, so that the regulator always keeps in a position corresponding to the input signal, to complete the servo adjustment task.
Product structure features:
1. The valve body and cover of the regulating valve are forged from 20# boiler steel or CrMoV alloy steel according to different temperature and pressure requirements; Under normal working conditions and service conditions (no solid particles/other impurities in the fluid) can be used for more than ten years without replacement;
2. The valve is composed of (valve seat/spool rod assembly/throttling assembly/covering/cushion), and the flow rate is adjusted linearly into equal percentage with good flow characteristics; All parts in the valve can be disassembled, easy to repair and save;
3. Valve seat and spool are made of 2Cr13 stainless steel, sealing surface surfacing cobalt base alloy, anti-erosion;
4. The valve stem is made of 17-4PH precipitation hardened stainless steel, resistant to bending, breaking and high temperature;
5. The sleeve is made of 2Cr13 stainless steel, surface hard nitriding treatment, strong anti-erosion performance;
6. Throttle module is made of 2Cr13 material, grinding after multi-layer surfacing; Customers can choose plunger sleeve type structure and labyrinth type structure according to specific needs!
7. The sealing surface of the valve is sealed by wire to achieve zero leakage;
8. The flow of valve medium is high into and low out, which has small impact on the spool and improves the service life of the valve as a whole;
Pneumatic ball valve in the pipeline is mainly used to cut off speed, distribution and change the direction of the flow of the medium. Pneumatic ball valve is a new valve widely used in recent years, it has the following advantages: fluid resistance is small, its resistance coefficient and the same length of the pipe segment is equal. Simple structure, small volume, light weight. Tight and reliable, ball valve sealing material is widely used in plastic, good sealing, in the vacuum system has also been widely used. Easy to operate, open and close quickly, from fully open to fully closed as long as the rotation of 90 degrees, easy to remote control. Convenient maintenance, pneumatic ball valve structure is simple, sealing ring is generally active, disassembly and replacement are more convenient. When fully open or fully closed, the sealing surface of the ball and the seat is isolated from the medium. When the medium passes through, it will not cause the erosion of the sealing surface of the valve. Pneumatic valves are suitable for a wide range of diameter from small to a few millimeters, large to a few meters, from high vacuum to high pressure can be applied. Widely used in petroleum, chemical industry, power generation, paper making, atomic energy, aviation, rockets and other sectors, as well as People's Daily life.
Pneumatic plate gate valve is also called pneumatic cut off gate valve, plate gate valve itself open, closing torque is very small, coupled with the pneumatic fast, suitable for emergency switch type pipeline, excellent sealing, easy switching, fast start, and safety explosion-proof advantages, in power plants, chemical industry, oil refining and other high safety requirements of the production process has a wide range of applications.
Product characteristics
1. The sealing structure of the seat shall be elastic with preload, and the upper and downstream sealing seat shall be sealed at the same time. The seat and the seal are always sealed face to face.
2. The seat has self-cleaning function, and in the valve opening or closing process is not directly washed by the airflow. The seat shall be made of lubricated, non-abrasive material.
3. Valve actuator failure will not affect other parts of the valve, maintenance and replacement work can be carried out without removing the valve.
(1) Yoke Casing -- Aluminum bronze yoke casing is equipped with needle thrust bearings to minimize operating torque.
(2) Valve stem -- thread length to bracket; Pin and spot welding; It has stability.
(3) Pressure Seal -- Simple construction with segmented buckle and silver plated mild steel gasket to facilitate removal and achieve the best possible bonnet seal.
(4) Seat ring -- Welded seat ring perpendicular to the flow channel, easy to maintain.
(5) Actuators -- These valves can be equipped with electric, hydraulic or pneumatic actuators. Standard manual hand wheel is configured below DN300, and helical gear operating mechanism is configured above DN350.
(6) Yoke -- Fully assembled yoke passes seismic testing and is easy to maintain and install actuator.
(7) Gland - two-piece, self-adjusting gland to avoid being popped out.
(8) Overall backseat - hard surface, the longest service life.
(9) Disc -- spring loaded disc can self-adjust to reduce the torque requirements of the actuator.
(10) Overall stop - the whole casting bracket stop device, positioning the assembled bracket valve disc, making the seat more stable and reliable.
Dt943H Electric Gas Regulating Butterfly Valve
Hard sealed butterfly valve as a component used to realize pipeline system on and off and flow control, has been widely used in petroleum, chemical, metallurgy, hydropower and many other fields
Dt943H Electric gas regulating butterfly valve Features:
1, electric gas regulating butterfly valve with three eccentric sealing structure, valve seat and butterfly plate almost no wear, with more view more tight sealing function
2, the sealing ring is made of stainless steel, with the double advantages of metal hard seal and elastic seal, both at low and high temperature, has excellent sealing performance, corrosion resistance, long service life and so on
3. The sealing surface of the butterfly plate adopts surfacing cobalt-based hard alloy, which has wear resistance and long service life
4, the large size of the plate quilted structure, high strength, large flow area, flow resistance is small
5, hard seal butterfly valve with two-way sealing function, installation is not limited by the flow of the medium, is not affected by the space position, can be installed in any direction
6. The driving device can be installed in multiple stations (rotate 90° or 180°), which is convenient for users to use
