Valves tap

Valves tap and its typical representatives

To start, list the devices that belong to the shut-off devices and regulators are standard fittings such representatives.

1. valve site.Use this control function, which enables a complete seal crossing holes, through its overlapping locking element.
2. Valve site.It provides shut-off function, by sealing the hole in the hull crossing through butterfly valves.
3. Crane site.It provides shut-off and regulating functions, performing seal crossing holes through the element in the form of a body of revolution.

Let's deal with the design of each device and consider their advantages.

The design of the valve is most often used to control the flow and shut-off function can be called secondary.It is simple, and resembles the T-piece, in which the piston is located in the vertical section, it moves along the axis and passes through the upper bar running water.Moving down the locking element can be achieved partial or complete sealing crossing aqueduct.The locking elements can be displaced by movement of the piston rod, which is controlled by a lever or valve.The valve, in turn, can be called the best control device.It is able to change the characteristics with high accuracy pipeline.

Unlike valve design, valve design is used only to seal the pipeline.It performs the function of constipation, but the flow adjustment with its aid is not possible.In this construction, using a plate or a wedge.The scheme works is simple: you have to move the lever to raise or lower the wedge or plate overlying the inner diameter of the pipe.It is justified in the case when it is necessary to block the flow of water very quickly.In fact, this device is not suitable for everyday use, and is used as an emergency shut-off element.

crane design includes a molded case (cast iron, brass) and stop-regulating element is presented in the form of a body of revolution.In this body done a special hole, the axis of which may or may not coincide with the direction of fluid flow.If coincides, the crane does not prevent the movement of water - if not vice versa.Such valves are used to turn on and off the flow at the point of consumption.

Standard installation of plumbing fittings.Nuances of the installation

Mounting valves for water supply is carried out in different ways, depending on what needs to be done to repair the appliance, or a quick replacement.

Apply two technologies.The first - the assembly unit to the threaded pair (draw in a locknut).The second - the assembly site on the flange connection (fixed with bolts).These two types are dependent on the pipeline, the first conduits used for low and medium pressure (1 to 100 atmospheres), and the second for high (over a hundred atmospheres).

threaded assembly is as follows: on the threaded pipe sleeves wind the lock nuts, sleeves and then screwed into the housing of the locking device.Installation location must be sealed with a special tape or tow (organic seal).Once the pipes are screwed, between the lock nut and the housing end is wound additional layer of a special seal.

Flange mounting is used only when the ends of the pipe and casing special rings will be installed.Thus, they must be zaklast the housing at the stage of designing the device.Flange ring mounted on the end of the pipe by arc welding.When the flanges are equipped, between the pipe and install a special gasket and tighten the flange mounting bolts.Doing a similar operation on the other side.This installation is quite simple.Operation, provides a tight and high-strength connection body of the fitting and the pipe.