application- Types and installation by own hands + Photo and Video

application- Types and installation by own hands + Photo and Video Now in our modern world, we cannot do without pipelines.

After all, water pipelines, sewerage systems, gas pipelines are communications of everyday life, but there are also oil pipelines, main routes of gases and liquids that are widely used in industry.

Accordingly, gate valves are used to regulate the flow of liquid or gas. But, based on the scale of the use of pipelines, today we will talk about electric valves.

Consider with you the types, characteristics of valves and where they are used.

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What is a gate valve with an electric actuator

Let's first analyze the concept of a gate valve.

The gate valve is a pipeline fittings. It moves perpendicular to the flow of the medium.

application- Types and installation by own hands + Photo and Video Used in pipelines from 1.5 to 200 cm.

At pressures up to 25MPa, and temperatures up to 565 C.

They are usually made as full bore when the diameters of the valve and the pipeline are the same.

For the automation of production, they take gate valves with an electric drive.

There are three types of drive in total:

  • Manual method , for this, a gearbox or a flywheel is used.
  • Mechanical method , for this they use multi-turn electric actuators.

  • Piston method , piston pneumatic drives or hydraulic drives are used for this.

The most rational and convenient type of drive is an electric drive. An asynchronous motor is often used.

The electric drive has 3 modes, commissioning, remote and automatic. An electrical communication cabinet is required for the actuator to function correctly.

Types of gate valves by design type

Tapered gate valves

application- Types and installation by own hands + Photo and Video The locking element is made in the form of a flat wedge.

The principle of operation is that a spherical or tapered plug is pressed into the tapered seat or valve gasket.

Weakly used in production, as there are a number of disadvantages, sensitivity to damage.

High quality surface finish of internal mechanisms is required.

Massive, requires considerable effort to dismantle and repair.

The advantage is that when the shutter is closed at the beginning, the shutter drops quickly, and at the end it slows down, due to this, the force of the dynamic impact is reduced.

By the type of gate valves differ in the form of a wedge:

  • Solid,
  • Elastic,
  • Double-disc.

Butterfly valves

Such valves are shaped like a disc. They have an angular or perpendicular position relative to the flow of matter. They are widely used in industry, in large-diameter pipelines, but they have pressure limitations.

The main advantages are simplicity of design, quick repair.For a cheaper option, the valve is made of stainless steel, and the body is made of carbon steel. For more specific media, polymer spraying is used on the disc.

Also classified by valve type:

  • Butterfly valve with double eccentricity
  • Butterfly valve
  • 3-eccentric disc
  • 4-eccentric disc

application- Types and installation by own hands + Photo and Video

Parallel valves

In parallel valves, the seats run in parallel, two discs form a valve, which are pressed against the seats by a fungus, preventing liquid from seeping.

There are two types of gate valves:

  • Knife gate,
  • Hose.

Types of gate valves according to the way the travel assembly is located

Rising spindle

It's simple: the spindle thread is out of the body fittings. The lower end of the spindle is fixed with a bolt, when the travel nut rotates, the bolt moves forward and the spindle moves out completely by the amount of the bolt travel. The running nut is located at the distance of the valve stroke.

application- Types and installation by own hands + Photo and Video

The advantage of this technical design solution is that the running unit is brought out, due to which he is not negatively affected by the internal work environment. Ease of repair and maintenance.

The disadvantages include a lot of weight and size, due to the fact that the chassis is taken out.

Fixed spindle

application- Types and installation by own hands + Photo and Video The thread is located inside the valve. The travel nut is attached to the valve and when the spindle rotates, it tightens the valve behind it. In this case, the spindle does not protrude from the valve cover.

Such valves are not used on important objects, because the running unit is located inside and is negatively affected.

Also, in order to carry out repairs, it is required to completely dismantle the entire valve.

But due to the fact that the spindle does not protrude, it is possible to use it with limited space.

Valve performance

Let's start with the positive features :

  1. Corrosion resistant.
  2. Has a low hydraulic resistance.
  3. Very robust and reliable, high speed.

  4. Little material required.
  5. You can use the speaker DN50.
  6. Prevents unauthorized power surges.
  7. Easy to use and maintain.

The disadvantages include :

  1. When using low-quality sealing materials, depressurization is possible.

  2. A permanent power supply is required, for this an electrical cabinet must be installed.

Application

There is a wide variety of valves, such as those listed below.

AVK valves are produced by a Danish organization. This is one of the world leaders. Has a wide range of products (wedge, flanged, slab).

For irrigation or fire extinguishing they use steel valves 30S941NZH with an electric motor, they regulate the flow well and accurately water according to the established regime. Made from environmentally friendly materials.

The main advantage is the low cost of about $ 4.

application- Types and installation by own hands + Photo and Video Disk valve with electric drive DU-100 , in its design it has a powerful spring which ensures stable reliability.

Widely used in the oil and gas industry.

100 means internal diameter, they are straight-through types, which means that the diameter of the valve must match the diameter of the pipeline.

The price of the product is about $ 70.

Such a valve has a large number of diameters. So DU-200 with an electric drive is used on highways, fastened with bolts of large diameter, used exclusively in industry.

The cost of such a valve is about $ 200.

Specialized valves DN800 / 1000 instead of a flange have branch pipes that are welded to the pipe.

The most common are flanged valves DU-50 and DU-80 . They have become widespread in the heating system during the construction of apartment buildings, in unloaded pipelines.

The average price for such a product is about $ 70.

Gate valves 30h906br with an electric drive made of cast iron, used for steam and liquid with an operating temperature of up to 250 ° C.

Since the valve is made of cast iron and not steel, the cost is lower.

Gate valve SFG-432 - made of steel, used for water and steam, withstand pressure up to 16 bar, withstand the maximum temperature of the working medium up to 450 ° C.

The cost of the product is about $ 30.

Gate valve RTP-900 - made of steel, used for oil and oil products, withstand pressure up to 14 bar, withstand the maximum temperature of the working environment up to 350 ° C.

The cost of the product is about $ 40.

Gate valve СМР-34 - made of cast iron, used for water, oil and steam, withstand pressure up to 16 bar, withstand the maximum temperature of the working environment up to 400 ° С.

The cost of the product is about $ 35.

Installation of gate valves with an electric drive

To simplify the installation of valves and the pipeline, flanges are welded onto them, this makes it possible at any time and without obstacles to perform routine maintenance of the worker unit.

application- Types and installation by own hands + Photo and Video Before installation, inspect the surface of the flanges for scratches and gouges.

Compare the diameters, insert the O-ring, screw on the bolts and tighten slightly, re-check and tighten.

Check the tightness.

After installing the valve, we mount the control cabinet.

The electric motor is capable of rotating at a frequency of about 1400-1500 rpm. Engine power is about 1 - 1.5 kW.

The cabinet is equipped with overvoltage protection.The power of the electric drive is on average 1 kW.

Recently, manufacturers began to produce electric drives directly with a control unit.

For example, electric actuator AUMA MATIC AM 01. 1 The approximate cost varies from 200 to 400 thousand rubles.

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