Eccentric hemispherical valve for urban sewage treatment

NegotiableUpdate on 04/14

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Overview

Eccentric hemispherical valve $r $n for urban sewage treatment is a relatively new type of ball valve. Its design feature is that the center of the valve ball does not coincide with the center of the valve body, but deviates by a certain distance. It has some advantages of its own structure, such as frictionless switch, low sealing wear, and small opening and closing torque. Equipped with a multi turn electric actuator, it can regulate and tightly cut off the medium, and is widely applicable to working conditions such as urban sewage treatment that require strict cutting off

Product Details

Eccentric hemispherical valve for urban sewage treatment

working principle

Adopting a straight through structure, the flow channel is unobstructed and there will be no blockage caused by dust accumulation. It is suitable for conveying media such as dusty gases and granular fluids. It has good applications in various pipeline controls of blast furnace coal powder injection, powder production systems, and dust removal systems in metallurgical, mineral processing, power and other production processes.

There are various sealing materials available, with different choices for different working conditions. For example, when transporting coal powder, the sealing pair is made of Co-Cr-W alloy material, which has undergone special heat treatment. The valve is resistant to erosion and wear; In the working conditions of blast furnace gas and gas, the sealing pair is made of Cr Mn Si hard alloy, which is fire-resistant, explosion-proof, anti-static, and resistant to high temperature of 425 ℃. Its corrosion resistance and anti bite ability are more than 6 times that of stainless steel sealing pairs.

The hemisphere of the valve is made of bimetallic material, and different alloys are welded onto the base material. The valve seat is also welded with corresponding special treatment, and the sealing surface is composed of various types such as anti-corrosion, wear-resistant, and high-strength to meet the needs of different occasions, such as transporting harmful liquids.

The eccentric spherical surface of the valve has automatic compensation performance. By adjusting the bolt on the worm gear, the sealing pair can still achieve resealing even under certain wear and tear. And the valve core of the sealing pair has a compensation amount. When the valve wears out and is closed, it can still be reliably sealed by rotating a little, which extends the service life.

wide range of applications

Widely applicable, with diameters ranging from a few millimeters to several meters, and suitable for applications ranging from high vacuum to high pressure. The products are divided into six series according to their uses: universal valves, pipeline valves, slurry valves, gas valves, petrochemical valves, and coal powder injection valves. There are three transmission modes: manual, pneumatic, and electric, with eight pressure levels (PN0.25-6.4Mpa) and hundreds of specifications (40-1000) to choose from.

other advantages

It has cutting function and can cut off impurities (tree branches, textile bags, etc.) in the medium when closed. When fully open or fully closed, the sealing surfaces of the ball and valve seat are isolated from the medium, and when the medium passes through, it will not cause erosion of the valve sealing surface.

Application scenarios

In the field of urban sewage treatment, eccentric hemispherical valves can be used to control, cut off, and regulate the flow of fluids such as sewage. In addition, its application is extremely extensive, covering multiple industries such as petroleum, chemical, power, metallurgy, shipbuilding, etc. It is used for oil transportation, chemical raw material processing, hot water or steam control in power systems, etc.

Installation precautions

Cleaning and rinsing

Remove the protective covers on both sides of the flange end and rinse and clean with the valve open; Before connecting to the pipeline, it is necessary to flush and clean the remaining impurities in the pipeline, which may damage the valve seat and ball.