Chinese Electric Gate Valve for Sewage Pipes - Flanged Connection, Electric-manual Integrated Actuator, Remote Control Soft-seal Gate Valve
Product Description
【Product Name】 Double-Action Pneumatic Manual Integrated Flange Gate Valve (Switch Type, Cast Steel / Stainless Steel Options Available) [Core Positioning] An efficient pipeline switch device that integrates pneumatic automation control with manual emergency operation. It features a double-action actuator and high-quality valve body material, specifically designed for industrial fields such as petroleum, chemical, metallurgy, and power. It precisely realizes the rapid opening and closing of fluid media and safe throttling, and is suitable for complex working conditions such as high pressure and corrosive environments.
1. Core Structure and Performance Advantages
Dual-mode Control System: Equipped with an integrated pneumatic manual design. Daily operation can be achieved by driving the double-action actuator with 0.4-0.6 MPa purified compressed air to achieve automatic valve opening and closing. When the air source is interrupted, the electromagnetic valve fails, or emergency operation is required on-site, the self-locking conversion device on the top of the cylinder cover can be used to quickly switch to manual mode without the need for auxiliary tools, completing the control by turning the handwheel. This provides dual guarantees to avoid pipeline shutdown accidents. The conversion handle adopts a positioning pin self-locking design, ensuring reliable switching and preventing accidental operation that may affect operational safety.
Double-Action Reinforced Actuator: Using a double-layer cylinder structure, the lifting force is doubled compared to traditional single-cylinder designs, fundamentally solving the problem of the valve plate getting wedged and unable to open within the valve body. The built-in buffer mechanism can slow down the descent speed of the piston in the later stage of valve closure, effectively reducing the impact and wear on the sealing surfaces of the gate plate and valve seat, and avoiding the problem of excessive wedging that may cause jamming, thereby extending the service life of the sealing components. The actuator can be paired with a feedback device to real-time transmit the valve opening and closing status to the control center, enabling remote monitoring and centralized management.
Dual-Material Valve Body Selection: Two valve body materials are available for selection: cast steel and stainless steel. They are suitable for different working conditions:
Cast Steel Material: Possesses high strength and high pressure resistance, with a nominal pressure of up to 1.6-6.4 MPa. It is suitable for general media in industrial fields and high-pressure pipelines, offering outstanding cost performance.
Stainless Steel Material (304/316L, etc.): Has excellent corrosion resistance and can withstand corrosive fluids such as nitric acid and acetic acid. The working temperature range is from -40°C to 550°C, suitable for scenarios with high purity requirements for media in food, pharmaceutical, and chemical industries.
The valve body is manufactured using a flange-on integral casting process, with a compact structure and reliable strength. The inner wall is smooth to reduce fluid resistance.
Standard Flange Connection Design: Adopting GB913, HG20592, etc. standard flange connection methods, it is convenient and efficient for connecting to industrial pipelines, with strong installation sealing. The open stem structure is combined with an extended indicator rod, allowing for intuitive judgment of the valve's opening and closing status through the elevation of the rod body, making on-site operation clear and straightforward.
2. Application Scenarios and Core Parameters
Applicable Media: Water, steam, oil, air, corrosive fluids, slurry, sewage, and other media;
Control Mode: Pneumatic remote / centralized control (supporting electromagnetic valve signals) + on-site manual emergency operation;
Function Type: Switch Type, precisely achieving the opening and closing of pipeline media and throttling;
Key Parameters: Nominal Diameter DN50-DN800mm, Nominal Pressure 1.6-6.4 MPa, Protection Grade IP55 (customizable IP67), Explosion-proof type suitable for Class IIA and IIIB explosive gas environments.
3. Safety and Maintenance Characteristics
Multiple Protection Design: Explosion-proof products comply with GB3836.1 standards and can be used in non-mining work areas of coal mines and factory explosion-proof environments. The valve body is treated for anti-corrosion on the inside and outside. The cast steel valve body can withstand a temperature of 425°C. The stainless steel valve body is suitable for a wider temperature range and is adaptable to harsh industrial environments.
Convenient Maintenance Structure: The packing box on the valve cover is designed with replaceable seals, and the scraper structure can prevent dust and sand from entering the packing box, reducing wear on the valve stem; The actuator and valve body are modularly designed, facilitating individual maintenance or upgrading the existing manual gate valve to pneumatic modification. 【Selection Tips】 You can select the appropriate material and specification based on the characteristics of the medium (corrosive / ordinary medium), working pressure, and explosion-proof requirements, to provide a safe, efficient and flexible fluid control solution for industrial pipeline systems.