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SM steam electric ball valve actuators can directly receive 4～20mADC or 1～5VDC control signal from computer or industrial instrument output, 220VAC power supply, and compare the deviation of valve position feedback signal with set value to implement intelligent stepping of actuator drive motor. Adjustment (PID adjustment) to achieve accurate positioning of the valve or other device opening matching with the actuator, and output position feedback signal of 4 ~ 20mADC. Its core control unit electronic servo controller applies modern digital technology and is designed on the basis of DCS/PLC specifications. It integrates signal acquisition, processing, feedback and control. Using original electronic brake circuit and adding mechanical damping device to eliminate inertia, it can be stopped instantly, no oscillation when positioning, and the positioning accuracy can reach more than 0.3%. SCR output, fast operation time, stable output and high reliability. Small size, light weight, reliable performance, simple matching, large circulation capacity, especially suitable for occasions where the medium is viscous, containing particles, and fiber properties. At present, the valve is widely used in food, environmental protection, light industry, petroleum, paper, chemical, teaching and research equipment, power industry and other industrial control coefficients. 
Steam electric ball valve is a new generation of high-performance ball valve, suitable for long-distance pipelines and general industrial pipelines. Its strength, safety, 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, when the valve is in operation, the force produced by the fluid pressure in front of the valve on the ball is transmitted to the bearing, and the ball does not move toward the valve seat, so the valve seat will not be subjected to excessive pressure, so the fixed ball valve The small torque, small deformation of the valve seat, stable sealing performance, long service life, suitable for high pressure, large diameter occasions. Advanced spring pre-valve assembly with self-tightening features for upstream sealing. Each valve has two valve seats that can seal in each direction, so the installation has no flow restriction and is bidirectional.
This valve has two-piece and three-piece two-piece body structure. The middle flange is connected with bolts. The seal is made of reinforced PTFE embedded in the stainless steel ring. There is no spring at the rear of the steel ring to ensure that the valve seat is tightly attached to the ball. seal. There are no PTFE bearings on the upper and lower valve stems, which reduces friction and saves effort. There is no adjustment piece at the bottom of the small shaft to ensure the position of the ball and the sealing ring.
Full diameter: The flow aperture of the valve is the same as the internal diameter of the pipeline so that the pipeline can be cleaned. (1) Effortless operation: The ball is supported by the upper and lower bearings, which reduces friction and eliminates the excessive sealing load caused by the inlet pressure pushing the ball and the seal seat. Torque.
(2) Reliable sealing performance (see Figure 1): The PTFE single-material material sealing ring is embedded in the stainless steel valve seat. The metal valve seat end is provided with a spring to ensure sufficient pre-tightening force of the sealing ring, and the sealing surface wears during use of the valve. At the moment, the valve continues to guarantee good sealing performance under the action of the spring.
(3) Fireproof structure (see Figure 2): In order to prevent the occurrence of sudden heat or fire, the PTFE seal ring is burned and a large leakage occurs, which encourages fire and sets a fireproof sealing ring between the ball and the valve seat. When the sealing ring is burned, the seat sealing ring is rapidly pushed onto the ball under the action of the spring force to form a metal and metal seal, which plays a certain degree of sealing effect. The fire resistance test meets the requirements of APl6FA and APl607 standards.
(4) Automatic Pressure Relief Function (See Fig. 3): When the medium pressure in the middle of the valve chamber rises abnormally and exceeds the preload of the spring, the valve seat retreats from the sphere to achieve the effect of automatic pressure relief. Automatic reset.
(5) Drainage line: The upper and lower parts of the valve body are provided with a drain å‘L to check whether the valve seat is leaking. During the work, when the valve is fully open or fully closed, the pressure in the middle chamber is removed, and the filler can be directly replaced; Retentate in the cavity to reduce the media contamination of the valve. Auxiliary seal setting system (customer needs please specify when ordering)
(6) See Figure 4: The valve is designed with an auxiliary seat emergency sealing system. Once the seal is damaged or the emergency ten conditions cannot be sealed, the seal can be repaired by injecting the corresponding sealant into the sealing surface through the auxiliary sealing system. Face, to achieve emergency seal. When the conveyed medium is dirty or contains a small amount of particles, in order to protect the sealing surface and ensure reliable sealing, this device can also be injected with a corresponding cleaning agent or lubricant to clean the sealing surface.
(7) Widely applicable to the cutting off or circulation of mediums in food pipelines, pharmaceuticals, petroleum, chemicals, natural gas, steel, environmental protection, papermaking, etc. The device can also be injected with a corresponding cleaning agent or lubricant to clean the sealing surface.
Steam electric ball valve Shanghai professional manufacturer
Accepts the control signal: 0 ~ 10mA.DC, 4 ~ 20mA.DC or 1 ~ 5V.DC.