To eliminate the fire requires a whole systemconsisting of a hydrant, hoses, valves and other types of elements. These devices allow you to supply water directly to the site of fire. Not a single fire extinguishing system can do without high-quality valves, to which the fire valve belongs. Consider what types exist, their differences and advantages of use.
Normative acts
In all that relates to fire extinguishing systems, the regulation occurs with reference to the following documents:
- Airbag 154-2000. This regulation discloses all data on fire fighting equipment, valves of fire hydrants. It also regulates the technical part: safety requirements and methods of testing equipment.
- GOST R 53278-2009. The previous document provides a link to this GOST as the basic document, which provides a clearer description of the definitions of regulatory values.
- Federal Law №123. This law regulates legal situations in the event of a fire, as well as measures to prevent it.
These regulatory documents govern all areas, from the production of valves to its use and testing.
What it is?
Вентиль пожарный (он же клапан) входит в состав the crane. It is installed on the internal water supply system for extinguishing a fire with the temperature of a liquid or gas up to 50 ° C. One end of this product is made in the form of a coupling, and the other end is tsapkovy (external thread), for tightening the coupling coupling head.
По конструкции вентили пожарные ничем не differ from conventional counterparts. The difference is only in diameter and material performance. In their design, they have a flywheel, sleeve, packing gland, head body, stem thread, insulation, valve with gasket.
Kinds
We can distinguish several types of various features:
- By type of installation - channel, wall.
- By the form of the external structure of the case - angular (90 ° or 125 °), continuous, straight-through.
- According to the function - locking, locking and regulating, special.
- By material - cast iron, brass.
- On internal diameter - 50 mm or 65 mm.
- By type of connection - coupling / clutch, coupling / pinhole. A pin in the fire valve allows you to attach a hose to the hose (metal tip of the fire hose).
A variety of classifications does not affect the basic quality of such valves - reliability.
Valve requirements
There are a number of prescriptions for fire dampers:
- tightness of the product and connections;
- nominal passage - from 40 to 65 mm;
- working pressure at the moment of water supply - not less than 1 MPa;
- working pressure is carried out under the valve;
- operating temperature should not exceed 50 ° C;
- the number of turns before opening - from 4 to 6, depending on the nominal passage;
- flywheel rotation - right;
- Mandatory pressure testing within 12 hours before sale.
All these requirements make it possible to launch the system into action under extreme conditions as quickly as possible under fire conditions.
Material of execution
The valve of fireman is made from cast iron and brass.
This is due to the fact that such products musthave durability and reliability. Cast iron and brass are distinguished by such characteristics, namely, anti-corrosion, durability and ability to withstand the high pressure of the system.
All these properties allow the use of such products for a long time.
Marking
The properties of the crane are displayed not only in alphabetic, numerical designation, but also in symbolic and in the color of the painting of the case. Marking is applied by casting and must contain the following data:
- nominal diameter;
- nominal pressure;
- case material;
- trademark and / or manufacturer's name;
- flow direction of the working environment;
- year of issue;
- arrow pointer direction of the working environment;
- gasket designation for flange seals, etc.
Other types of markings are applied according to the requirements of regulatory documents and regulations.
Color marking reveals what material the body is made from:
- black - gray, ductile, high-strength cast iron;
- gray - carbon steel;
- blue - alloy steel;
- blue - high alloy steel, corrosion-resistant and heat-resistant alloys.
As you can see, the fire fighter valve fully discloses its characteristics in the marking.
Features of installation and maintenance
Various types of designs allow you to install the valve of a fire hydrant in any position.
Do not install the flywheel down.In a fire, working with the water supply system should be accessible and easy. In an extreme situation, every second is important, so the valve should simply open at 4-6 turns. Modern designs allow you to perform such actions without additional levers.
Installation must be leakproof.system. When the valve is installed on the pipeline, gasket and packing seals are tightened. Before installation, the pipe must be thoroughly cleaned of dirt and sand.
Device Requirements:
- It is possible to install the valve using a coupling head.
- If a packing seal fails (wear), it is replaced.
- Stem is subject to periodic lubrication.
- Regular equipment testing.
- At the end of the shelf life of the equipment it is dismantled and sent for recycling.
- The service life of the valves depends on the correct installation and maintenance.
Gate valve fire - one of the most importantfire extinguishing system devices. From its quality and proper installation depends on the speed and the possibility of its use in emergency situations. And this directly affects the life of a person. Therefore, the use of fire equipment that does not comply with regulatory documents is strictly prohibited at enterprises.
When buying devices such as a valve,need to request a certificate of conformity. Pay attention to the marking, how well it is applied and whether the technical specifications are as required. In no case should not take products of dubious origin. They do not differ in proper quality and reliability. It is not worth saving on such products, the life and health of people directly depend on them.
