Electric eccentric hemispherical valve

Electric eccentric half globe valve is an automated control valve that integrates an electric actuator with the eccentric half globe valve body. The core drives the valve core to rotate through an electrical signal, achieving the cutoff and accurate adjustment of the medium. It combines the convenience of electric control with the wear-resistant (based on actual reports) and anti blocking advantages of eccentric hemispherical structure, without the need for manual supervision. It is designed specifically for complex industrial media containing solid particles, high viscosity, and easy scaling, and is widely used in demanding automation conditions such as petrochemicals, metallurgy, power, and environmental protection.

The core structure consists of a valve body, an eccentric hemispherical valve core, an electric actuator, and a sealing compensation system. The valve body adopts a straight through flow channel, with no dead corners to prevent sedimentation; The eccentric hemispherical valve core and valve seat are arranged eccentrically, and the opening speed is suitable to detach from the sealing surface, reducing friction; Electric actuators are equipped with AC asynchronous motors or stepper motors, integrated with reducers, limit switches, and signal feedback devices, supporting remote control and opening feedback; The sealing pair adopts metal hard seal or PTFE soft seal, combined with spring compensation structure, which can automatically reset after wear. In terms of material, the valve body is made of cast steel and stainless steel, and the valve core is welded with wear-resistant alloy (based on actual reports), suitable for corrosion, high temperature and high pressure working conditions.

The working principle is based on the logic of "electrical signal mechanical linkage": after receiving signals from PLC or remote controller, the electric actuator drives the worm gear transmission, drives the eccentric shaft to rotate 90 °, and the valve core moves synchronously. When opened, the eccentric structure allows the valve core to detach from the valve seat at a suitable speed, allowing the flow channel to pass through smoothly, and creating a self-cleaning space; When closed, the end of the valve core is in shear contact with the valve seat, cutting off debris, and the spring pushes the valve seat to automatically compensate for sealing, achieving excellent sealing. The actuator can finely control the valve core opening to meet the flow regulation requirements, while also providing feedback on the valve status to the control system, forming a closed-loop control.

Key performance parameters adapted to automation working conditions: nominal diameter DN50~DN1400mm, nominal pressure PN16~PN64MPa; Suitable for temperatures ranging from -29 ℃ to 350 ℃, with media including complex fluids such as slurry, coal powder, sewage, oil and gas; The sealing level reaches GB/T 13927-2008 level 1, and the metal seal can achieve zero leakage; The electric actuator is powered by AC220V/380V or DC24V, with an adjustment accuracy of ± 1% and a protection level of IP67, suitable for harsh environments.

The core advantages of the product are significant: firstly, it has a good degree of automation, supports remote control and linkage, reduces labor costs, and is suitable for intelligent factories; Secondly, it is wear-resistant (based on actual reports) and anti blocking, with an eccentric structure and shear function, which can handle media containing impurities and avoid jamming; The third is excellent sealing, automatic compensation design extends service life, and zero leakage protection system operates safely; The fourth is meticulous regulation, excellent flow characteristics, low flow resistance when fully open, and energy-saving effect; The fifth is convenient maintenance, with some upper mounted designs supporting online repairs, reducing downtime.

Typical applications focus on industrial automation scenarios: used for oil and gas and chemical medium transportation in the petrochemical industry, adapted for coal powder injection and slurry pipelines in the metallurgical industry, used for slag removal and heating systems in the power industry, used for sludge transportation in sewage treatment plants, and also suitable for automation control of natural growth gas, pulp and other media.

Attention should be paid to installation and maintenance: Install according to the flow arrow and reserve space for actuator maintenance; Clean up impurities in the pipeline before installation, and verify that the working conditions match the valve parameters; Regularly inspect the lubrication and sealing surface wear of the actuator, and replace vulnerable parts in a timely manner; Long term shutdown requires turning off the power to protect the valve core and sealing surface.