The characteristics of the foot valve?

Definition of foot valve.

The bottom valve, also known as a check valve, is a low-pressure flat valve, its role is to ensure the one-way flow of liquid in the suction pipe, so that the pump works normally when the pump stops working for a short time so that the liquid can not return to the water tank, to ensure that the suction pipe is filled with liquid to facilitate the start of the pump.

The bottom valve is a kind of check valve, which plays the role of preventing the backflow of water.

The bottom valve can be divided into the plastic bottom valve and metal bottom valve according to the material, and also can be divided into an ordinary bottom valve and a backwash water bottom valve.

Bottom valves are widely used in petrochemical, chemical, textile, printing and dyeing, metallurgy, mining, drainage, and irrigation industries for water pumping facilities. Usually, the bottom valve is installed at the bottom of the submerged suction pipe of the pump to prevent the backflow of slurry.

 

Structural features of bottom valve.

The bottom valve has multiple inlets on the valve cover and is equipped with a screen to reduce the inflow of debris and reduce the chance of blocking the bottom valve. Although the bottom valve is equipped with an anti-clogging screen, the bottom valve is generally suitable for clean media, and the bottom valve is not suitable for media with too much viscosity and particles.

 

What is a screen?

Screens are made of woven metal or fiber wire with apertures of 0.15~1mm. capable of removing and recovering different types and days of small suspended matter, screen separation has the advantages of simplicity, efficiency, and low operating costs. It is generally used for smaller-scale wastewater treatment. There are many kinds of screens, the main two are vibrating screens and hydraulic screens.

The so-called screen mesh is different from the general mesh products. Rather, there is a strict series of mesh sizes. And it has the function of classifying and screening the particles of the object, which is approved by the industry, institutions, and standards. The screen does not speak "mesh", "mesh" is just a habit of people to describe the screen, it is difficult to overcome for a while. Screen differs from general mesh products in that it has a strict mesh size, not a "mesh". Screen sizes are not isolated, but are composed of a series of mesh sizes for the purpose of grading and screening.

 

Foot check valve characteristics.

The bottom valve is a kind of energy-saving valve, generally installed at the bottom of the pump underwater suction pipe to restrict the liquid in the pump pipe to return to the water source, playing the function of only in and out. The valve cover has many inlets and reinforcement bars, which are not easily blocked and are mainly used in the pumping pipeline. The role of water channel and support. Caliber has single, double, and multi-flap types, with flange connection and threaded connection. Other names: female thread lift bottom valve - well bottom valve, suction valve, water filter valve, rosette; lift bottom valve - flange well bottom valve; swing bottom valve - flange swing bottom valve.

The bottom valve is welded at the bottom of the container so that the best effect of emptying, cleaning, and disinfection can be achieved. In addition, the working medium can be well mixed according to the various process requirements during the operation. The bottom valve is located as close as possible to the bottom wall of the tank, thus achieving a dead-end effect.

1. The structure is ideal in terms of flow rate and process requirements, in addition to not generating turbulence when emptying.

2. All current international standard connections are available, such as welded, clamped, or threaded.

3. The valve body material is US304.SUS316L, but other alloy steel can be used according to the customer's requirements.

4. The surface of the valve body can be mechanically polished or electropolished according to the customer's requirements, and the precision can reach 0.25um.

5. Bottom valve can be equipped with a manual, and can also be equipped with a pneumatic pump to install a bottom valve, bottom valve is usually installed below the water surface, while the water type bottom valve is installed above the water surface, it is the replacement of the old bottom valve, is the ideal water diversion equipment and can also replace the vacuum pump and vacuum device.

The bottom valve has a reasonable design, advanced manufacturing technology, and easy installation, use, and maintenance. And has the advantages of small friction resistance, long service life, energy-saving, etc., widely used in petrochemical, chemical, textile, printing and dyeing, metallurgy, mining, irrigation, and other industries of the pump supporting facilities.

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