Crane with fitting: device, application, typical problems
What can be used choke valve? What is its design performance? Do these cranes have any typical faults? Let's try to answer these and some other questions.
About terminology
Immediately eliminate confusion. In this case, under the nozzle, we mean the hose outlet, which is a corrugated tube - herringbone. In addition, you can encounter another well-established understanding of the term: a pipe for external valves is often referred to as external pipe thread.
The inscription ball valve nut-fitting on the price tag usually means that we have a valve with external and internal threads. Accordingly, a ball valve fitting-union is a product with two external threads.
Curiously: a less politically correct definition is often used. The first variant of execution is called mom-dad, the second - dad-dad.
Application
Where and for what can be used valves with fitting?
- For the dosed selection from the tank of liquids, including food. A typical example is bottling kvass or beer from a barrel. The fitting allows you to increase the length of the spout with a hose (in particular, when filling into containers, due to their size they are not included in the barrel tray).
- Drain (perforated) hose connected to the fitting can be used for watering the beds.
- Drainage of accumulative tanks with rain or melt water is often desirable not on the path in front of them, but on the beds or even beyond the boundaries of the site. The ability to connect a hose to the drain valve will help here.
- The choke ball valve is the ideal flushing tool. Installing it in a blind plug of a heating radiator will provide a minimum of problems with the discharge of dirty water into the sewage system: it is enough to press the garden hose onto the fitting with any clamp.
- Finally, let's not forget about dumping in technical rooms.. For example, on technical floors or in basements that are used as warehouses, it is not possible to dump water from the riser to the floor. The valve with the fitting will allow it to take in the sewer system of the house.
Device
What could be the device of choke cranes?
Water box
A 1-2 water tap with a choke is different from any other water tap, in fact, only by this choke instead of a spout. The body of the crane is usually made of brass (often chrome plated); the water is overlapped by a conventional Kranbuksa, compatible with any domestic mixer.
The great advantage of the product is the simplicity of its repair. When making a rubber gasket, it changes just as easily as it does in a mixer. If it comes out of a standing Kranbucks, its replacement will also not be a problem: the price of a new axle box does not exceed 40 - 45 rubles.
Useful: ceramic kranbuksa much more durable and, unlike the screw, does not require maintenance. However, it is suitable only for liquids with a small amount of fine impurities. In addition, the capacity of the ceramic box is somewhat inferior to the screw tap.
Suberic
In the notorious barrels of kvass and beer, a couple of decades ago, mainly cork taps were installed. How are they arranged?
The tube in the form of a truncated cone with a through groove rotates in a brass body; grinding parts ensures tightness. As a rule, for reasons of hygiene with food liquids, tension cork taps are used: contact with the stuffing box is obviously useless in this case.
Sharovy
How does a ball valve - a drain with a fitting or any other?
Swivel plug with a through hole is replaced by a ball. Rod - a separate item; He enters the groove of the ball and is supplied with a convenient handle. Tightness is ensured by a pair of PTFE or Teflon seats between the ball and the body, as well as an annular seal around the stem, made of the same polymer.
Dimensions
A water tap imposes restrictions on the diameter of the thread to be connected: when the hole area in the saddle is less than a square centimeter, it is simply pointless to connect it to a pipe with a diameter of 40 mm.
The range of popular sizes of cork and ball valves is from DN15 to DN25. Large diameters are rare exotic simply because of the fact that the hose of the appropriate size is difficult to pull on the fitting.
Often products are marked in inches. Here is the size matching table:
| Do | Pipe thread size in inches |
| 15 | 1/2 |
| 20 | 3/4 |
| 25 | one |
| 32 | 1 1/4 |
Problems
What problems may arise when using the described valve elements? How to fix them with your own hands?
| Problem | Decision |
| Water valve is flowing when closed | Clearing the seat with the unwrapped Kranbukse, replacing the gasket |
| Water tap turns | Cranbooks replacement |
| Open water tap flows along the stem | Gland packing For kranbuksy with rubber seals repair manual is to replace them |
| When turning the cork valve flows from under the cork | The tension plug is tightened with a nut on the shank |
| Turning the plug requires a lot of effort. | The shank nut loosens |
| Ball valve flows through the stem | Tighten the nut that presses the stem seal. In its absence, an additional washer of a suitable size is placed under the handle, after which the handle is attracted to the rod |
| Flowing hose and nipple connection | Tightened clamp. When the hose is cracked, the first 5 to 8 cm are cut off; the hose is crimped on the fitting again |
Conclusion
We hope that our acquaintance with a relatively exotic type of valves was quite informative. As always, the video in this article will introduce the reader to additional material. Successes!