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All about the reactor discharge valve

1. Discharge valve type
The bottom discharge valve of the reactor is an important equipment used in chemical, petroleum, metallurgical, pharmaceutical and other industries It is usually installed at the bottom of the reactor or storage tank, and is used to discharge materials or take samples. According to different working principles and structural designs, the bottom discharge of the reactor can be divided into upper expansion type, lower expansion type and piston type.
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1. Top-lifting Discharge Valve
The top-lifting discharge valve is characterized by the upward movement of the valve disc to open the valve. design requires the valve to overcome the medium force during opening, resulting in a larger torque during opening. The top-lifting discharge valve is suitable for the discharge valve of the reactor with stirrer. Its structure is designed to be flat-bottomed, and the valve body is V-shaped, which can effectively eliminate the residue phenomenon of the process medium at the outlet.
2. Bottom-lifting Discharge Valve
The valve disc of the bottom-lifting discharge valve moves downward to open the valve. This design allows the movement direction to the same as the medium force during opening, resulting in a smaller torque during opening. The bottom-lifting discharge valve is suitable for the discharge of the reactor with a frame anchor stir. Its structure is also flat-bottomed, but compared to the top-lifting discharge valve, its installation height is smaller.
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3. Plunger type blow-down valve Plunger type blow-down valve is divided into two structural forms according to the plunger structure and motion mode lifting rod type and rotating rod type. The lifting rod structure requires a larger installation space, but the valve opening and closing and position can be judged intuitively. The installation height the rotating rod structure is the smallest. During the opening and closing process, the plunger only makes a rotating motion, which needs to rely on the opening and closing position indicator to the valve opening and closing and position.
2. Discharge valve temperature sensor The bottom discharge valve temperature sensor is a device used to measure the temperature of the material at the bottom of the chemical. It is usually integrated with the bottom discharge valve to monitor the temperature of the material in real-time during the discharge process. This sensor is essential for controlling the chemical reaction process preventing overheating, and ensuring production safety.
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In the market, there are various types of bottom discharge valve temperature sensors, which can be selected according to different application occasions and medium requirements. For example, sensors adopt PT100 explosion-proof temperature sensors, which can achieve online temperature monitoring and remote central control room monitoring, as well as temperature control of the material in the reactor In addition, some sensors are designed to be integrated with the valve stem, which can directly penetrate the valve body and place the temperature sensor in direct contact with the material, ensuring the of the temperature data.

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3.Characteristics of the Discharge Valve The main use of the reactor bottom discharge valve is to be installed at the bottom of reactors, storage tanks, and other vessels for the purpose of draining, discharging, sampling, and achieving a dead-zone-free shut-off operation. This type of valve is welded or connected to the bottom of the container through a bottom flange, effectively eliminating the residue of process media at the container outlet and ensuring complete discharge of materials. The design of the reactor bottom discharge valve typically takes into account the need for easy maintenance and cleaning, making it widely used in the bottom application of reactors in industries such as chemical, food, and pharmaceutical. 

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4.Selection of Reactor Bottom Discharge Valve When choosing a suitable reactor bottom discharge valve, you need to consider the following key factors:

1. Material state: Select the appropriate type of discharge valve based on the state of the material in the reactor (solid, liquid, or gas). For example, valves are suitable for solid materials (such as powder, granular materials), while plug valves (top and bottom valves) are suitable for the discharge of liquid materials.

2.Temperature and pressure: Different valve materials can withstand different temperature and pressure ranges. Ensure that the material and design of the selected valve can adapt to the working conditions inside the reactor.

3. Corrosion resistance: Select the corresponding corrosion-resistant material, such as stainless steel or special alloys, based on the chemical properties of the medium used in the, to extend the service life of the valve. 

4. Cleaning and maintenance: Choose valves with simple structures, easy to clean and maintain, to facilitate regular inspection and of seals, and keep the valve in normal working condition.

5. Automation level: Automated valves with pneumatic actuators can be selected according to the needs operation convenience and safety. This allows for semi-automatic or fully automatic control, reducing the risk of manual operation.

6. Safety: Ensure that the selected valve has necessary features, such as explosion-proof, leak-proof, etc., to ensure the safety of operators and equipment.

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