Price of discharge valve

Stainless steel pneumatic discharge valveThe main parameters of the discharge valve include: nominal diameter DN, rated flow coefficient KV of the discharge valve, nominal pressure and pressure difference of the discharge valve, material of the discharge valve body and components inside the valve, flow characteristics of the discharge valve, applicable temperature of the discharge valve, and whether the discharge valve comes with accessories.

1、 Nominal diameter: also known as mean outer diameter, with the symbol DN, is the universal diameter for various pipes and pipeline accessories. Pipes and pipeline accessories of the same nominal diameter can be connected to each other and have interchangeability It is not the actual outer diameter or inner diameter of the pipeline, although its value is close or equal to the inner diameter of the pipeline. In order to unify the connection size of pipes and fittings, the nominal diameter (also known as nominal diameter or nominal diameter) is used. For example, welded steel pipes can be divided into thin-walled steel pipes, ordinary steel pipes, and thickened steel pipes according to their thickness. Its nominal diameter is not the outer diameter or inner diameter, but a nominal size that approximates the inner diameter of ordinary steel pipes. Each nominal diameter corresponds to an outer diameter, and its inner diameter value varies with thickness. The nominal diameter can be expressed in metric millimeters or imperial inches. Pipeline accessories are also represented by nominal diameter, which has the same meaning as seamless pipes.

II Nominal pressure: The symbol PN represents the allowable working pressure when applied at a certain temperature. The control valve for carbon steel valve body refers to the allowable working pressure for applications below 200 ℃; For cast iron valve bodies, it refers to the allowable working pressure for applications below 120 ℃; For control valves with stainless steel valve bodies, it refers to the allowable working pressure for applications below 250 ℃. When the working temperature increases, the pressure resistance of the valve body will decrease. For example, a carbon steel control valve with a nominal pressure of 6.4 MPa (PN64) has a pressure resistance of 5.2 MPa at 300 ℃, 4.1 MPa at 400 ℃, and 2.9 MPa at 450 ℃.

3、 Pressure valve body material: cast steel, stainless steel, 316L. Working pressure 0.6-2.5MPA, working temperature -20 ℃ -425 ℃. Valve diameter DN50-DN300. Connection method: flange. Transmission mode: manualpneumaticApplicable media: oil products, acidscorrosiveMedia, etc. Manufacturing standard: National standard.

Stainless steel pneumatic discharge valveMainly used for bottom discharge, feeding, sampling, and dead zone shutdown operations of reaction vessels, storage tanks, and other containers. By welding the bottom flange of the valve to the bottom of the storage tank and other containers, the residual phenomenon of process medium at the outlet of the container is eliminated The discharge valve is designed with a flat bottom structure and a V-shaped valve body according to the actual needs, and provides two working modes of valve discs: lifting and lowering. The inner cavity of the valve body has a corrosion-resistant and erosion resistant sealing ring, which can protect the valve body from being eroded and corroded by the medium when the valve is opened. The sealing ring is specially treated to achieve a surface hardness of HRC56-62, with high wear resistance and corrosion resistance. The valve disc seal is welded with hard alloy on the cover surface as needed, and the sealing pair is made of wiresealEnsure the reliability of the seal and prevent scarring. Simultaneously adopting a short stroke valve disc design.

4、 Main equipment performance:

1. Upward type discharge valve, corrosion resistance: 1. Use media such as water, acetone, alcohol, ammonia, barium carbonate, benzene (WCB material temperature range -29 ℃ -425 ℃). 2. Use media such as particles, oil, pulp, and carbon dioxide gas (stainless steel material can be used at temperatures of -60 ℃ -232 ℃). 3. It is strictly prohibited to use fluorine-containing ionic liquids (such as HF) or strong bases and phosphoric acid (temperature less than 150 ℃, concentration>30%). 4. The general working temperature of stainless steel is ≤ 150 ℃, and the pressure range is 0.6-2.5MPA. If it exceeds this requirement, it should be explained when ordering.

2. Discharge valve, corrosion resistance: 1. Polytetrafluoroethylene has excellent adhesion to metals, moderate tensile strength, and resistance to dilute and concentrated acids. 2. Use media such as particles, oil, pulp, and carbon dioxide gas (stainless steel material can be used at temperatures of -60 ℃ -232 ℃). 3. It is strictly prohibited to use fluorine-containing ionic liquids (such as HF) or strong bases and phosphoric acid (temperature less than 150 ℃, concentration>30%). 4. The general working temperature of stainless steel is -5 ℃ -225 ℃, with a pressure range of 0.6-1.6MPA. Orders exceeding this requirement should be specified.

3. Discharge valve:Glass lined equipmentIt is a glassy glaze with high silicon content. Made by coating on a metal tire at around 900 degrees Celsius. It has good mechanical properties and corrosion resistance, which can prevent the substitution of media and metal ions from affecting the pollution of products. The surface is smooth, wear-resistant, and has a certain degree of thermal stability. This valve is capable of removing phosphorus and phosphorus light media, hydrofluorocarbons, hydrochloric acid, sodium hydroxide, potassium hydroxide, and can withstand various acids, alkalis, salt solutions, and organic solvents. A、 Corrosion resistance: 1. Able to withstand general inorganic acids, organic acids, weak alkaline solutions (P ≤ 60 ℃, pH ≤ 12), and organic agent media. 2. It is superior to stainless steel in strong corrosive media such as hydrochloric acid and nitric acid. It is strictly prohibited to use fluorine-containing ionic liquids (such as HF), as well as strong bases and phosphoric acid (temperature less than 150 ℃, concentration>30%). B、 Heat resistance, allowed to be used between -30 ℃ and 240 ℃ (with a resistance to sudden temperature changes of less than 120 ℃). C、 Has a smooth surface. Difficult to bond materials and easy to clean. E、 Insulation: The impact resistance is relatively low at 2500 grams per centimeter, so hard object impact should be avoided during use. F、 This valve with a pressure resistance of 0.6MPA cannot be installed upside down

5、 Performance and Application:

This valve is easy to operate, free to open, and has flexible and reliable movement; The valve disc assembly and maintenance are simple, the sealing structure is reasonable, and the sealing ring replacement is convenient and practical

6、 Structure and principle:

(1) Valve body, (2) bracket, (3) handwheel:

(6) PTFE perforated plate

(7) Packing: PTFE sealing ring

(8) Pressure cover: cast iron

(11) Collage Hat: 35#

The structure of the discharge valve is shown in the diagram, suitable for glass lined discharge valves with a design pressure P ≤ 0.6MPa and a working temperature t ≤ 1500C.

The technical specifications of the valve should comply with the provisions of HG5-16-79. This valve is capable of removing phosphorus and phosphorus light media, hydrofluorocarbons, hydrochloric acid, sodium hydroxide, and potassium hydroxide

Resistant to various acids, alkalis, salt solutions, and organic solvents