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of issue:2021-03-05 15:21:05
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Rotary Valve
Description
brief introduction
According to working conditions, it can be divided into gravity discharge type rotary feed valve, pneumatic conveying rotary feed valve, and variable discharge rotary feed valve,
According to function, it can be divided into standard rotary feed valve, high-pressure rotary feed valve, high-temperature rotary feed valve, wear-resistant rotary feed valve, anti-seize rotary feed valve, cleaning rotary feed valve, and electric rotary feed valve
working principle
The rotary feed valve rotates an impeller with an equally divided structure inside the housing through the transmission of a motor and a reducer. The materials from the upper bin or feed device of the housing are filled in the mold cavity of the impeller, and the materials are discharged from the lower part of the housing as the impeller rotates. The material can be uniformly and continuously discharged downstream according to the requirements of the conveying system.
Category and characteristics
The electric rotary feeding valve is mainly used in the gravitational feeding or pneumatic conveying system of powdery and granular materials. The motor is used as the driving device. The valve body is equipped with an impeller, which rotates to equalize the speed and provide quantitative feeding. In addition, a precision designed rotary valve can also be used as a fan closing or gas locking rotary valve. Flange connections are generally made of stainless steel and carbon steel
Direct blow rotary feed valve side discharge is suitable for powder, directly connected to the pneumatic conveying pipeline. High pressure gas is blown directly through the bottom of the valve body, preventing powder from adhering to the impeller and improving conveying efficiency. Flange connection, generally made of stainless steel and carbon steel
High temperature rotary feed valve is mainly used for conveying powdery and granular materials under high temperature requirements, with a maximum operating temperature of up to 500 ℃, which puts higher requirements on the main body and sealing of the rotary valve. Flange connections are generally made of stainless steel
High pressure rotary feeding valve is suitable for low speed, high pressure dense phase pneumatic conveying of granular materials, and is used as a controllable feeding device. The valve body is designed with an exhaust port and anti jamming design. The maximum operating pressure difference is 0.6Mpa, and the maximum operating temperature can reach 500 ℃. Flange connections are generally made of stainless steel
The anti jamming rotary feed valve is mainly used for particle and gravity feeding and pneumatic conveying feeding, and is equipped with a special anti jamming structure guide groove. Generally, a V-shaped feed inlet is used, and the blade tip is chamfered; Integrated valve body exhaust port;
The wear-resistant rotary feed valve is mainly designed for conveying powder and particle materials with strong wear resistance. The significant difference is that the inner wall of the valve body and the material contact part are sprayed with wear-resistant materials
The cleaning type rotary feed valve is widely used in occasions with high hygiene requirements in the food and pharmaceutical industries, with a polishing degree of # 400, convenient disassembly, easy to clean quickly, and meets high hygiene standards.
Product Features
1. Simple structure, convenient use and maintenance, and the temperature of transported materials can be between 0~300 ℃
2. The frequency converter can remotely control the adjustment of its rotational speed, making it easy to change the feeding amount
3. With the change of physical properties and the change of material stored in the separator or dryer, the discharge amount changes very little
4. It has a certain degree of airtightness and a slow rotational speed, which hardly causes material damage
The outlet and inlet of the rotary feed valve housing are generally tangent arranged, with a plow-shaped suction edge to prevent shearing and trapping of the product. Even if discharged from a full silo, it can work normally. The conveying capacity of the rotary feed valve is approximately proportional to the rotational speed of the rotor. The circumferential speed of the outer end of the rotor blade must be within a certain range, and when the speed exceeds this range, the capacity of the feed valve decreases as the rotational speed increases, This phenomenon is believed to be due to the excessive rotational speed of the blades, and when discharging downward from the same rotor blade, some of the powder particles that should have been discharged were brought back without falling in time. Therefore, when the diameter of the rotor is larger, the rotational speed of the rotary valve is smaller. According to on-site use experience, when the rotor diameter of the rotary feeding valve is between 600mm and 800mm, the rotational speed range is between 20 and 30r/min, which is suitable for different material characteristics and liquidity, And the pressure difference between the inlet and outlet of the feed valve. The volumetric efficiency of the rotary feed valve is 0.7 to 0.8, and the volumetric efficiency of PTA powder is approximately 0.5 to 0.6
According to working conditions, it can be divided into gravity discharge type rotary feed valve, pneumatic conveying rotary feed valve, and variable discharge rotary feed valve,
According to function, it can be divided into standard rotary feed valve, high-pressure rotary feed valve, high-temperature rotary feed valve, wear-resistant rotary feed valve, anti-seize rotary feed valve, cleaning rotary feed valve, and electric rotary feed valve
working principle
The rotary feed valve rotates an impeller with an equally divided structure inside the housing through the transmission of a motor and a reducer. The materials from the upper bin or feed device of the housing are filled in the mold cavity of the impeller, and the materials are discharged from the lower part of the housing as the impeller rotates. The material can be uniformly and continuously discharged downstream according to the requirements of the conveying system.
Category and characteristics
The electric rotary feeding valve is mainly used in the gravitational feeding or pneumatic conveying system of powdery and granular materials. The motor is used as the driving device. The valve body is equipped with an impeller, which rotates to equalize the speed and provide quantitative feeding. In addition, a precision designed rotary valve can also be used as a fan closing or gas locking rotary valve. Flange connections are generally made of stainless steel and carbon steel
Direct blow rotary feed valve side discharge is suitable for powder, directly connected to the pneumatic conveying pipeline. High pressure gas is blown directly through the bottom of the valve body, preventing powder from adhering to the impeller and improving conveying efficiency. Flange connection, generally made of stainless steel and carbon steel
High temperature rotary feed valve is mainly used for conveying powdery and granular materials under high temperature requirements, with a maximum operating temperature of up to 500 ℃, which puts higher requirements on the main body and sealing of the rotary valve. Flange connections are generally made of stainless steel
High pressure rotary feeding valve is suitable for low speed, high pressure dense phase pneumatic conveying of granular materials, and is used as a controllable feeding device. The valve body is designed with an exhaust port and anti jamming design. The maximum operating pressure difference is 0.6Mpa, and the maximum operating temperature can reach 500 ℃. Flange connections are generally made of stainless steel
The anti jamming rotary feed valve is mainly used for particle and gravity feeding and pneumatic conveying feeding, and is equipped with a special anti jamming structure guide groove. Generally, a V-shaped feed inlet is used, and the blade tip is chamfered; Integrated valve body exhaust port;
The wear-resistant rotary feed valve is mainly designed for conveying powder and particle materials with strong wear resistance. The significant difference is that the inner wall of the valve body and the material contact part are sprayed with wear-resistant materials
The cleaning type rotary feed valve is widely used in occasions with high hygiene requirements in the food and pharmaceutical industries, with a polishing degree of # 400, convenient disassembly, easy to clean quickly, and meets high hygiene standards.
Product Features
1. Simple structure, convenient use and maintenance, and the temperature of transported materials can be between 0~300 ℃
2. The frequency converter can remotely control the adjustment of its rotational speed, making it easy to change the feeding amount
3. With the change of physical properties and the change of material stored in the separator or dryer, the discharge amount changes very little
4. It has a certain degree of airtightness and a slow rotational speed, which hardly causes material damage
The outlet and inlet of the rotary feed valve housing are generally tangent arranged, with a plow-shaped suction edge to prevent shearing and trapping of the product. Even if discharged from a full silo, it can work normally. The conveying capacity of the rotary feed valve is approximately proportional to the rotational speed of the rotor. The circumferential speed of the outer end of the rotor blade must be within a certain range, and when the speed exceeds this range, the capacity of the feed valve decreases as the rotational speed increases, This phenomenon is believed to be due to the excessive rotational speed of the blades, and when discharging downward from the same rotor blade, some of the powder particles that should have been discharged were brought back without falling in time. Therefore, when the diameter of the rotor is larger, the rotational speed of the rotary valve is smaller. According to on-site use experience, when the rotor diameter of the rotary feeding valve is between 600mm and 800mm, the rotational speed range is between 20 and 30r/min, which is suitable for different material characteristics and liquidity, And the pressure difference between the inlet and outlet of the feed valve. The volumetric efficiency of the rotary feed valve is 0.7 to 0.8, and the volumetric efficiency of PTA powder is approximately 0.5 to 0.6
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