We make the return valve on the water with your own hands

• coupling with outdoor thread;
• tee with internal thread;
• spring (freely included in the tee);
• steel ball (a little less than the inner diameter of the tee);
• thread plug;
• tape FUM.

If there is no suitable springs, it can be done yourself.

We need a wire and the rod of the desired thickness so that it can be filtered on it steel wire.

The rod is the hole, the end of the wire is inserted into it. In order to be more convenient, the rod is clamped in vice and the desired number of turns (pliers) is hidden.

Now you can go to the valve assembly:

1. The coupling is screwed into the tee so as to overlap the side opening of about 2 mm (so that in the future the ball does not jumped there).
2. From the opposite end, the ball is inserted, then the spring.
3. This end is plugged with a plug on FUM tape.

The flow of water in the homemade valve will be on the side of the coupling, repel the ball, and go out from the perpendicular end of the tee.

The most important thing here is to properly adjust the spring so that it does not deviate when the pressure will decline, but it was not too tight and did not prevent normal circulation.

It remains only to add that in stores the check valve can cost within 800 - 3000 rubles. The decision to make a locking item on your own, or buy, you need to be taken from the real estimate of your capabilities as the master. After all, the device is albeit simple, but the system plays an important role. The miscalculations and lack of tightness can cost expensive in an emergency situation.

Video on the topic

From this article, you will learn a little about the foundations of the functioning of check valves and in more detail how to make the check valve with your own hands. The use of pipelines of all kinds assumes that the liquid or gaseous substance will pass on it in one particular direction. Makes the check valve itself, or by purchasing a sample from the series, you can provide this condition for the operation of the pipeline itself and its equipment.

Application and principle of check valves

In pipeline systems, the reverse stream may occur completely for various reasons. If this happened in a liquid medium, then most likely this reason is to disconnect the pump. If we are talking about ventilation, then, it is definitely a bad installation of an exhaust pipe or the amount of incoming air is too small.

No matter how no reason is, it is not desirable that this takes place at all, because it leads to bad work of the system details or, in the end, the way out of the order.

In order to prevent the appearance of the reverse stream in the pipe system, the check valves are put on it. Well, they, of course, differ in size, appearance and factory execution.

The main purpose of such a device that is attached to the pipes, in which, in turn, pass liquids or gases is to skip the moving stream in one direction and, accordingly, block it when it tries to move in the opposite direction.

The design of the typical check valve necessarily includes the following items:

• Frame, the inner part consists of two communicating cylinders.
• Shut-off element. In the role of it can be: ball, sash or cylindrical spool
• Spring, which will press the shut-off element.

Well, the principle of action of this design is very simple.

• After the flow of a gaseous or liquid medium reaches the desired pressure, the pressed locking element is pressed and gives the stream to safely pass through the inner cavity of the device.
• If suddenly happened so that the flow pressure dropped, the spring would immediately return the shut-off element into the covered state, thereby blocking the return path for the flow.

Idea for the manufacture of reverse valve with your own hands

This approaches do not require any expensive materials or complex equipment, because it will seriously save, but before you start, you need to make sure you have:

• Coupling, on the housing of which there is an outer thread.
• The tee within which there is a thread.
• Spring, which can enter the tee.
• The ball of steel, in which the diameter is smaller than the cross section of the inner part of the tee.
• Threaded plug
• FUM seal ribbon

After you prepare all the material to work, you can start assembling in this sequence:

• In the threaded hole of the tee you need to screw the coupling so that it is about two millimeters closed the hole from the side. It is necessary to do this only to the ball, which we place in the inner part of the tee, did not jump over the hole side.
• On the opposite side of the tee we are looking for a hole where you need to insert the ball first, and after the spring.
• This is the very hole where there is a ball and spring, you need to buy a threaded plug, which we must be tightened using FMU ribbon to seal.

It's all. Our valve will work at the following rule: the flow of liquids or gases, which enters the side of the coupling, will push the ball, which clamps the spring, and go to the output through the perpendicular micro hole in the tee.

In this case, the most important thing is to accurately adjust the spring so that it does not deviate when the pressure in the pipeline decreases, but at the same time it was not too tight, so as not to block the flow of flow water, which passes through the design.

Well, of course, it is necessary to first fulfill all the connections on which the thread is. So that the check valve was sealed enough and did not let any unnecessary elements through itself.

Photo check valve do it yourself

To ensure the placement of fresh air, it is not necessary to keep the window overlooking. It is much more convenient to install a trim valve in the room.

Thanks to its simple design, the ventilator is not necessary to buy: if you wish, you can make a similar device with your own hands.

Design Description

1. Air duct. The usual tube that is inserted into the hole in the wall. Through it - air will pass.
2. Outdoor grille. It is installed on the end of the pipe entering the street. Does not penetrate into large insects, leaves, poplar fluff, precipitation.
3. Insulation. Prevents the pipe freezing and simultaneously serves as a silencer of noise.
4. Inner headband. Valve body located indoors. Contains a filter.

The casing of the adhesive should also be able to complete the valve closing: in winter, in a heavy frost (below -10º) the ventilator is better to cover. Too cold air simply will not have time to heat up, even if the valve stands next to the battery. As a result, the room temperature will fall, and there will be a draft.

In addition to these parts, the trim valve may additionally be equipped with:

1. Fan (working both on the influx and air removal).
2. Heater.

What do you need to create?

A new trimming valve is not less than 1200-1500 rubles. More quality models - will cost approximately 3-4 thousand. Count, how much will it cost to make a homemade ventilator.

We will need:

1. Plastic tube.
2. Lattice.
3. Insulation.
4. Filter.
5. Case with valve.

Below - consider it more detailed how to choose these parts to create a supplit valve with your own hands.

Trumpet – will play the role of the air duct. The length of the plastic tube - choose the thickness of the wall. If the thickness is unknown - you can take a meter segment with a reserve, and already during work - cut off the desired piece.

The diameter of the duct is up to 100-120 mm. More - not recommended: too much air will not have time to warm. In addition, the hole in the wall of large diameter - can lead to a serious disruption of the indoor microclimate.

To create a wall shape with your own hands, the usual non-PVC pipe is suitable. Price - 150-250 rubles (per meter).

Lattice – will wear outside on the pipe, and protect it from various garbage and precipitation. The product must be plastic, ideally - have an internal protective grid. Form - does not matter.

The size of the lattice - must overlap the diameter of the pipe (that is, if the air duct with a diameter of 100 mm - the grille should be at least 120 x 120 mm). Cost - about 150-250 rubles.

Insulation - inserted inside the pipe. Due to the thermal insulation, the wall around the valve will not freeze in the winter. The insulation can be performed from the foam, extruded polystyrene foam, polyurethane foam or mineral wool.

Any pipe insulation suitable, suitable in diameter (i.e., for adhesions with a diameter of 100 mm - it is necessary to take the "shell" of the same diameter). The length does not necessarily take the length of the pipe - it will be enough to insulate a third of the air duct, located closer to the room. The thickness of the insulation will be enough 20 mm. You can meet in 200 rubles.

Filter - inserted inside the valve body. It serves to delay dust and pollen. Make a filter can be made of porous material called polyph, or from ordinary foam rubber. A small piece is needed, the size of about 110 x 110 mm (to overlap the pipe). It will cost up to 50 rubles.

Valve housing - installed inside the room.It is not easy to make it with your own hands, so the most convenient option is to purchase the finished headpoint of the ventilator. Such, for example, produced by Vents, and sold in ventilation equipment stores. Cost is about 300-450 rubles.

As an option, the inner housing can be replaced by a ventilating grid with adjustable blinds. In this way, the amount of incoming air can be changed, or completely overlap the flow.

Calculate the total amount:

1. Air duct - up to 200.
2. Grid - up to 200.
3. Insulation - up to 200.
4. Filter - 50.
5. Headband - up to 450.

In the amount - 1100 rubles. It is averaged figure: actually make a wall trimming valve and cheaper.

How to Improve Device: Fan or Heated

Supplement homemade trim valve can installing the fan. The usual channel is suitable, the main thing is that it coincides with the diameter with the duct pipe. It connects to the network, controlled - through the switch endowed on the wall.

You can install the fan in two ways: towards the room or towards the street. The air can be accessed in the room, and the opposite is to be removed. In the second case, the valve will work as a passive aid, and with the fan turned on - as a hood.

By cost: Axial channel fan with a diameter of 104 mm, having a humidity sensor and a shutdown timer, will cost approximately 1200-1400 rubles. Air performance in such a model (for example, Vents 100 East) - about 100 m³ / h.

Another option is audio with heated. Such a device is particularly relevant in the conditions of our climate: Even if the valve is installed in the wall near the battery - at -10º and less air will not have time to warm up.

To make a ventilating valve with heating air, a spiral heating element will be required as a wire. When it is selected, it is necessary to clarify its power and the temperature generated. PVC melts at a temperature of + 150º, and it starts to deform - already at + 70º.

Therefore, when using the heating wire, it is recommended to replace the plastic duct on the metal.

Installation of fittings in the wall on the example of the valve domain (video)

How much air will miss?

If we take into account how much air passes: about 36 m³ / h with a diameter of the pipe 133 mm - the performance of the self-made adhesive can be estimated. It means that at 10 pa dresses of pressure between the street and the room (the average indicator, relevant with normally working exhaust ventilation), the valve (with an air duplex with a diameter of 100 mm) will skip about 25 m³ / h (without a working fan).

Required tools and materials for work

In addition to the parts mentioned above, it is necessary to create and install the supply valve of the supply ventilation.

In water supply, heating, ventilation systems, the need to regulate the direction of water or air flow direction is often found. To do this, apply the check valve. It skips the stream in one direction and overlaps the pipeline if he tries to change the direction of its movement. The market presents a large number of models of such shutters of different designs. But in the home workshop, the return valve make it yourself quite real.

principle of operation and purpose

The purpose of the device is to allow the reversal of the flow of water or air in the opposite direction. Such a stream can derive the equipment or significantly reduce the quality of its operation. They are used in home systems:

• Water supply. The shutters are put in the lower part of the water intake and do not give water to drain into the well or a well when the injection or intake pump is stopped.
• Heating. The valve is placed at the bottom point of the contour to avoid the reverse current of the coolant when the temperature drops.
• Ventilation. Check valve put on an extract in apartment buildings to prevent the occurrence of reverse thrust when opening windows or doors. In low-rise buildings, it prevents street air to enter the hood.

In any gate, regardless of its design, there are the following details:

• The housing, which is a hermetic chamber, joined the pipeline break.
• Stacking elemental, spherical or petal.
• The saddle is a compacted circuit, to which the shut-off element is pressed and overlaps the lumen for the flow.
• The return element presses the shut-off to the saddle. It can be a spring or gravity.

The principle of the shutter operation is simple:

• The water or air pressure in a given direction overcomes the strength of the spring or the force of gravity and presses (or raises) a shut-off element from the saddle.
• The flow flows to the desired side.
• When aft fall or attempt to turn around in the opposite direction, the power of the spring or the force of gravity presses the shut-off element to the saddle and overlaps the lumen.

The higher the head in the opposite direction, the stronger it presses the shut-off element to the saddle and the more reliably the flow is blocked.

Possibility of manufacturing with your own hands

Deep financial sense The independent manufacture of valves does not have the purchase of components will cost almost more than the finished valve of industrial production. Either the domestic workshop should be high-precision drilling, turning and milling machines for self-making parts of the device.

Most often, homemade masters make the valves with their own hands to test their strength in designing and assembling. There are also non-standard gate for home technological plants for the manufacture of beverages or aquarium filtering systems and aerations. Next, the design and technology of manufacturing shutters will be considered:

• Ball for water.
• Gravitational ball for water.
• Tarbed.
• Petalic for ventilation.

Designs are selected uncomplicated, the technology does not require the use of expensive equipment. Make a simple check valve in a home workshop quite real. It is enough to own locksmith skills at the middle level.

Instruments

For the manufacture of devices, you will need the following tools and equipment, which is certainly available in each self-respecting homemade workshop:

• Work desk or workbench.
• Things or massive clamp.
• Metal hacksaw.
• Drill or desktop drilling machine.
• Passatia.
• Mounting knife.
• Set of files and legs.
• Emery paper of different grain.
• Lobzik (electric).

Materials and components for various designs are required different and will be listed in the appropriate section.

Ball for water

In order to make the valve, you will need:

• Watering clutch with external thread.
• Steel or brass tee with internal thread.
• Spring, freely entering a tee.
• Metal ball, with a small gap included in the tee.
• Plug on a tee.
• Summer Fium or Plumbing thread.

If it was not possible to choose a spring, it is hung from elastic wire. Take the rod, drill a hole in it and refuel the end of the wire there. Next, it is clamped with steel wire in the rod with visets, and the pliers are spawned the spring, laying the coils closely.

The assembly is carried out in such a sequence:

• The coupling screws into the tee in such a way that it overlap the lumen of the side nozzle is at least 2 mm.
• The ball is inserted into the hole opposite and reflect its spring.
• Screw the plug.
• The coupling and the cap before the final assembly you need to wind the seal.

The pressure of water coming from the coupling press the ball and opens the lumen for the flow in the forward direction. If the pressure drops, the spring presses the ball back and presses it to the coupling cut, overlapping the flow in the opposite direction.

It will take to adjust the power of the pressure force of the spring so that the standard pressure in the system is enough for spinning the ball. We also have to carefully polish the clutch cut, so that the ball lightens to it without gaps.

Petalic for ventilation systems

Industrial check valve for ventilation systems prevents the reverse thrust in exhaust systems

The proposed design is comparable in efficiency with industrial samples and is able to work for several years, after which it will have to replace the petals.

For manufacture, you will need:

• Plate of textolite with a thickness of 3-5 mm 15 * 15 cm. You can use any hard plastic.
• Film from thick plastic 15 * 15 cm.
• Sealant.

Step-by-step instructions for manufacture and assembly:

• Slip the plate so that it corresponds to the size of the hood.
• In the corners, the holes are made for fastening the valve to the fan or fitting.
• In the middle to drill or cut the bulbs with a hole for air passage. At least 80% of the channel cross section should be drunk.

• Cut a piece of flexible plastic and glue it from the edges of the base.
• Cut it along the axial line. Cut to make smooth, without roughness.
• Insert the shutter into the canal and fix it with screws or screws. Fasteners must be drawn to the street.

Tarldy

Tarbed axial shutter can be made of girlfriend.

To do this, you will need:

• Fitting 1/2 "for 15mm.
• Bolt with a diameter of 3 mm and a length of 40-50mm.
• Two nuts to the bolt.
• A piece of rubber from the cycling chamber.
• Metal strip.
• Coupling 1/2.

The manufacture of the self-made valve is carried out in the following sequence:

This valve is used in home vacuum chambers. It triggers from the pressure drop.

River gravitational

This simplest construction is designed to work in water bodies. It is put immediately after the submersible pump or at the lower end of the intake tube. Works homemade gravitational check valve using gravity. It can only be installed on vertical segments of pipelines.

For the manufacture of the device will need:

• Truck polypropylene tube.
• Metal or glass ball. The ball must be made of hard water.
• Fitting.
• Ring gasket.

The inlet pipe of the valve is connected to the outlet of the pump or water filter. The ball is selected based on the inner diameter of the pipe.

The valve seat is formed by a ring gasket at the point of changing the pipe cross section. The gasket must fit tightly to the walls, and the laying ball. This design should withstand the pressure of the fluid column above the valve.

Depending on the depth of the water mirror in the horizon, it can be from 6 to 15 meters. The outlet is attached to the housing on the other side. And further to the water intake pipe. So that the ball did not leave too far from the saddle and did not block the outlet, you need to drill two transverse holes in front of it and insert a piece of wire in them.

The wire will need to be securely sealed with glue, sealant or spout. It will serve as a vertical motion of the ball.

When the pump begins to work, the water pressure is raining the ball over the seat, and it opens the passage for fluid flow. The limiter does not allow the ball to climb too high and overlap the outlet.

When the pump is turned off, the strength of gravity and the reverse head of the fluid column press the ball to the saddle, and it overlaps the pipeline.

Possible difficulties

In the process of self-making, domestic masters face a number of difficulties:

• Wrong calculation of the pressure force. The spring has to shorten or, more unpleasant, kick over. This task is solved usually by selection.
• Insufficient quality surface treatment of the saddle. The valve is not pressed against it completely and passes water. Solved by grinding the surface.
• Too high stream resistance in a specific system. It does not solve, you have to choose another type of valve or buy industrial.

Alone, the manufacture of the check valve will serve as a good check of its engineering and plumbing skills.