Double flap valve
Driven by a pneumatic actuator, ensure that at least one layer of the valve plate is always in a closed position.
Equipped with an electric actuator (including reducer, crank, cam, and other components), supporting variable frequency speed control.
Equipped with a counterweight balance system , achieving automatic reset of the valve plate through the lever principle.
The air locking and unloading function is achieved by the alternating action of a single valve plate.
By alternating the plate, a continuous unloading cycle is formed, enhancing the ability to resist material jamming.
Rotary Valve
Used in conjunction with screw conveyors and chain conveyors for sealed discharge.
Compatible with square pipelines or hopper interfaces for easy direct installation.
Stainless steel can withstand acids, alkalis, high temperatures , and corrosive media.
The cast iron casing has high hardness, making it suitable for abrasive materials .
More impact-resistant, making it suitable for high-load or foreign object-laden conditions.
Suitable for high pressure differences (0.6 MPa) or flammable and explosive dust.
Explosion-proof design meets high-level standards such as ExdⅡCT4
Discharge highly abrasive powders from vertical mills and cyclone dust collectors.
Flow control gate valve
Gradually adjust the cement raw material powder and apply at the outlet of the homogenization tank.
Flange connection form, suitable for scenarios such as bottom discharge of the silo and air slide chute transportation.
Control the discharge flow of raw materials/sintered materials, with a capacity of up to 50-100 tons per hour.
With a rigid sealing structure and it offers outstanding cost-effectiveness in small and medium-sized cement plants.
The modular design enables quick replacement of the actuators and is compatible with both pneumatic and electric modes.
Capacity 200 tons per hour, meeting the continuous operation requirements such as ship loading at the port.
Lump Breaker
Small in size and light in weight, suitable for scenarios with limited space.
Requires higher power drive (above 1.5kW), suitable for larger flow requirements.
Suitable for more complex conditions, such as high temperature and high flow scenarios.
Suitable for high-hardness materials , with compressive strength up to 320 MPa
Excellent crushing effect, superior wear resistance, long service life.
Precise control, prompt response, prevention of pipe blockage and corrosion, etc.
Slide Gate Valve
The electric device is equipped with a torque control mechanism and supports manual emergency switching.
The handwheel is combined with a trapezoidal threaded valve stem, resulting in an opening and closing torque as low as 50N·m.
Supporting 4-20mA signal control, and can be linked with the DCS system to achieve remote opening and closing.
The Hydraulic-electric system has good stability and is highly reliable and stable for the long term using.
Guaranteed Quality at A Better Price
By choosing our discharge valve, you will enjoy the advantage of factory direct sales without middleman markup, which makes the price more competitive. At the same time, we strictly control every production process to ensure that our products meet high quality standards. In addition we also provide you with comprehensive after-sales service, so that you can buy with confidence and use with peace of mind.
Discharge Valve Application Cases
The discharge valve is widely used in industrial production, mainly for the stable control and sealing isolation of the material transportation system.
Different types of discharge valves are suitable for various scenarios based on their characteristics such as wear resistance and sealing performance.
The silo discharge valve in the fields of cement, metallurgy and chemical industry performs the dual functions of precise discharge and sealing and dust prevention. Darko’s bottom system has developed a three-level modular combination of slide gate valves, rotary valves and flow control valves, meeting the requirements of the ISO 15378:2025 sealing standard.
The dust collector discharge valve, as the core control component of the pneumatic ash conveying system, mainly fulfills the dual functions of dust emission and system sealing. In scenarios such as the purification of blast furnace gas in steel plants and the dust removal at the end of cement kilns, it is often used in series with double flap valves to form a two-level sealing system for protection.
The discharge valve is adopted as the lock wind device at the inlet of the vertical mill. The quantitative feeding is achieved through the rotation of the impeller, while blocking the exchange of internal and external air pressures in the system.
The discharge valve in the pneumatic conveying system is the core component that ensures the stable operation of the system. Its core function is to achieve gas sealing and continuous feeding.
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Supports remote monitoring of the Internet of Things and automatic tank mouth positioning. Measurement accuracy: ±0.5%
More Information
If you would like to know more about our discharge valve, please feel free to contact our sales team. We will provide you with detailed information, product demonstrations and customised solutions.
It is necessary to clearly define the requirements for material particle size, temperature, corrosiveness and process flow.
Under normal conditions, carbon steel or 304 stainless steel is used; in highly corrosive environments, plastic lining or Hastelloy alloy is adopted.
V=V1×N×60×(1−G)×K
V: Discharge capacity volume (m³/h);
V 1: Volume per revolution of the rotor (L/rev or m³/rev);
N: Rotational speed (rpm);
G: Material density (T/m³) or discharge percentage (in some formulas, it is the filling rate);
K: Correction factor (typically 0.7 – 0.8) or bulk density (T/m³).
Yes! Our discharge valves are highly customizable.
Delivery times vary depending on the order quantity and customization options. Typically, standard orders are shipped within 10-15 business days, while customized configurations may take longer.
Yes, we provide comprehensive support, including user manuals, selection guides, configuration videos even Free on-site assistance.