Electric globe valve Manufacturer in China
The sealing surfaces between the disc and seat of electric globe valves are generally fabricated by surfacing welding with iron-based alloys or (Stellite) cobalt-based hard alloys, which deliver excellent wear resistance, high temperature resistance and anti-galling performance.
various types of Our Electric globe valve
Our Longz lined globe valve features a compact structure and reliable sealing. It is an essential equipment that can effectively ensure the safe operation of your corrosive fluid transportation system and is suitable for use in your pipeline
Our Longz power station valves are applicable to various systems of thermal power plants. They can quickly cut off or connect your pipeline media. Compared with other valve products, the unique feature of our power station valves is their ability to withstand high temperatures and high pressures. The more pressure is applied, the more reliable the sealing is.
Our Longz water seal globe valve creates a liquid seal by injecting pressurized water, effectively isolating your piping system from atmospheric pressure and preventing toxic or flammable/explosive media from leaking along the valve stem.
One Valve, Two Sealing Solutions - Engineered for Your Medium
Our Longz electric globe valve is equipped with hard-faced valve seats or bellows-type valve stem seals – both serve different purposes and cannot be directly interchanged. They correspond to different medium characteristics and sealing requirements respectively. Based on your actual working conditions, pressure and other usage conditions, we can match different product configurations and solutions for you to better meet the needs of on-site use.
The hard-faced valve seat is suitable for high-temperature, high-pressure or media containing particles working conditions. This is because such media are prone to damage the soft valve seat when in contact with it. Therefore, in such conditions, a hard-faced valve seat is required to deal with the situation;
The bellows-type seal is suitable for working conditions where complete prevention of medium leakage is necessary: no packing is required around the valve stem, and the seal is achieved through the bellows-type seal. The medium will not leak outward through the valve stem area and there will be no any leakage.
Your Trusted electric globe valve supplier in China
Longz has obtained ISO 9001 international quality management system certification, ISO 14001 environmental management system certification, API certification from the American Petroleum Institute, and other certificates confirming that its products meet domestic and international authoritative quality standards. The company also holds more than 50 invention patents and technology innovation patents.
Our Longz electric stop valve is widely used in the natural gas industry for the cutting and throttling of pipeline systems at stations. With its reliable sealing performance, this product can effectively achieve the sealing and cutting of the medium, and is the preferred equipment for natural gas stations to achieve safe and precise cutting control.
Our Longz electric globe valve is applicable for industrial pipelines and corrosive medium transportation in the petroleum industry. It serves as a rigid demand for precise regulation, and can well meet the requirements of the petroleum industry scenarios for accurate control of medium flow rate and transportation processes
Our Longz electric globe valve is capable of controlling and cutting off the branch lines in your industrial water purification, circulating water regulation, and drainage shut-off applications. It is designed to provide reliable on-off control and precise shut-off for these branch pipelines, ensuring effective and stable operation within your water treatment system.
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This electric globe valve has very low resistance to the medium, making it highly suitable for large-diameter pipelines. During the transportation process, it will not affect the overall operation of the system due to excessive local resistance. Moreover, our medium loss has been effectively reduced compared to before, thereby further improving the transportation efficiency and economy.
ProcurementPalestinian Petroleum CompanyThis electric globe valve performs very stably in environments with strong corrosive media. After being put into use and running continuously for 10 months, the equipment has not suffered any damage at all, and it can fully adapt to the harsh corrosive conditions. Due to its good operating condition and low failure rate, the equipment basically does not require frequent maintenance or replacement of components, thereby effectively reducing daily maintenance costs and downtime losses
EngineerTurkish Chemical Company
When the electric globe valve is partially open, the medium rushes against the sealing surface at high speed, which will accelerate the wear of the conical surface. Over time, it is prone to internal leakage that is difficult to close.
The electric globe valve mainly relies on the tight contact between the valve disc and the conical surface of the valve seat for sealing. The sealing surface can be welded with Stellite hard alloy or use polytetrafluoroethylene soft seal. The specific choice depends on the medium temperature and working conditions.
The valve body materials of our electric globe valve include CF8, CF3, WCB, etc.
The working principle of the electric globe valve
The closing principle of the electric globe valve is to rotate the valve stem by the electric force, making the sealing surface of the valve disc closely adhere to the sealing surface of the valve seat, thereby blocking the flow of the medium.
The opening process of the electric globe valve: The electric actuator receives the opening signal, the motor drives the reduction gear to rotate, and drives the valve stem to move upward, lifting the valve disc away from the valve seat, allowing the medium to start flowing.
The closing process of the electric globe valve: The actuator receives the closing signal, the motor reverses, the valve stem moves downward, pressing the valve disc tightly against the valve seat, achieving sealing and cutting off. Adjustment process: For the adjustable electric stop valve, the actuator precisely controls the stroke position of the valve disc according to the instructions of the control system, thereby changing the cross-sectional area of the flow path and achieving continuous regulation of the medium flow.