Non-return valves. Scope. The principle of operation.

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the check valve is a type of protective pipe fittings. His task is to prevent changing the direction of water flow in the system. This type of valve flows the working medium only in one direction. The valve operates automatically, its use helps to prolong the life of the equipment.

Scope

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the Product plays the role of a fuse, it does not permit changing the direction of flow. check valve water can be used in various conditions. If you intend to work with aggressive or abrasive environments, you should choose the right model.

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valve Features correspond to the technical regulations of the customs Union TR CU 032/2013 "On safety of equipment operating under excessive pressure". To find out what materials were used in the production of a specific product model, you should examine its technical passport. On the valve there is a marking and special symbols.

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working Principle

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Water movement creates pressure, which lifts the shutter. If the pressure drops below a certain limit, the gate closes and the working environment can't move on.

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When you select reverse valve note that for stable full opening flow requires a certain minimum fluid flow. If the environment is not able to create the necessary pressure, the shutter will not open.

Installation

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Before installing the check valve on the water you should remove the protective covers on the flanges, if any. Definitely need to check inside the valves of foreign bodies or debris. At the laying of the pipeline should try to reduce the negative influence of stretching, bending and twisting forces.

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If the valve is used in vertical piping, you must use the locking spring. In the pipeline should be provided with compensating devices in the event of thermal expansion. This allows you to increase the length of the entire system in General and valves in particular.

Possible fault

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the Period of operation of check valves is not less than 5 years. For the duration of the service affected by the following factors:

  • exposure to the atmosphere and the environment;
    • your environment, their concentration, the types and aggressiveness;
      • temperature mode;
        • frequency actuation or operation of valves;
          • repair and maintenance
            • materials used seals.
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            the Most common faults become small duct or passage of water with the valve closed. The cause is often contamination. After cleaning the valve, his work stabiliziruemost. It is recommended to install a strainer before the isolation valves. Often problems arise from the installation of the valve with the wrong diameter. Malfunction is much less likely to happen if there is a area of calm flow.
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