Double directional sealed ball valve for fire water cannon, anti freezing and pressure regulating, national standard specifications, and standard accessories for fire monitors

Description :

　　Ball valves are divided into:

　　a) Unidirectional sealing;

　　b) Bidirectional sealing.

　　Ball valves are divided into:

　　a) Flange connection;

　　b) Threaded connection;

　　c) One end flange, one end thread.

　　Three ball valves are divided according to their driving methods:

　　a) Manual operation;

　　b) Power driven.

　　operational performance

　　1. Manually driven ball valves should be equipped with handles or handwheels. Under the condition of nominal pressure difference between the inlet and outlet of the ball valve, the opening and closing force test shall be conducted according to the provisions of 6.3. The force required for opening and closing operations from the open or closed position shall not exceed 350N.

　　2. Power driven ball valves should be equipped with emergency operating handles or handwheels. When the power drive device malfunctions, the emergency operating handle or handwheel should be able to open and close the ball valve. The opening and closing force requirements are the same as 5.3.1.

　　Rotate the handwheel or handle clockwise to close, and there should be a sign indicating the direction of the switch. The handwheel or handle should have a sign indicating the position of the ball channel.

　　When the ball valve with a handle is in the fully open position, the handle should be installed parallel to the ball passage.

　　The handle or handwheel should be securely installed and easily disassembled or replaced when needed.

　　The ball valve should have a fully open or fully closed position limit device.

　　 Pressure resistance and sealing performance

　　1. Voltage resistance performance

　　The fire ball valve should undergo a pressure resistance test according to the provisions of 6.4.2, and should be able to withstand a static water pressure of 4 times the rated working pressure for 5 minutes. There should be no visible leakage at the connection between the pressure bearing wall and the valve body and valve cover during the experiment, and there should be no structural damage to the shell (including the packing box and the connection between the valve body and valve cover).

　　Leakage at the packing is allowed under the pressure of the pressure test, but there should be no visible leakage when the test pressure drops to the sealing test pressure.

　　2 Sealing performance

　　When conducting a sealing performance test on ball valves according to the provisions of 6.4.3, they should be able to withstand a hydrostatic pressure of twice the rated working pressure and maintain it for 5 minutes. The ball valve should have no visible leakage during the experiment.

　　Ball valve is a widely used valve equipment, which is widely used in various fields such as petroleum, chemical, power, metallurgy, and steel. Ball valves are mainly used on pipelines to cut off, distribute, and change the direction of medium flow. The opening and closing component of a ball valve is a sphere, which rotates 90 degrees around the axis of the valve shaft to achieve the purpose of opening and closing. The sealing of existing ball valves is achieved by squeezing the valve seat with a ball, but the material hardness of the existing valve seat is high and the rebound is poor. In order to achieve valve sealing, it is necessary to increase the valve interference fit, which results in high valve torque, increases the overall cost of the valve, and leads to a relatively short service life of the valve.

　　Shandong Dongyue Crane and Fire Equipment Manufacturing Co., Ltd. produces specialized ball valves for various fire monitors, with specifications and models of FQS80A, FQS80B, FQS80C, FQS65, and FQS80A/1.6. The fire monitor specialized ball valve is produced in accordance with the public safety industry standard GA79-94 "Performance Requirements and Experimental Methods for Fire Ball Valves" of the People's Republic of China, and is specifically designed for use with fire monitors. Its structural characteristics are: the connecting flange is a DN100 flange at the inlet and a DN80 flange at the outlet, with bidirectional sealing and a manual drain valve. When used in high-altitude areas in winter, the valve can be opened after being closed to drain the water inside the valve ball, thereby preventing the ball valve from freezing. Crack. The connection method can also be customized according to user requirements.

　　Shandong Dongyue Crane and Fire Equipment Manufacturing Co., Ltd. was established in 2001 with a registered capital of 15 million yuan. It covers an area of 69000 square meters and has a standard steel structure factory building of 12000 square meters. The company has 166 employees and 22 personnel with intermediate and high technical titles. Our company has the ability to independently research and develop, design, and produce, with excellent production equipment and advanced inspection equipment. All types of products have passed ISO9001 international quality management system certification, and various products have obtained certifications from the State Administration of Quality Supervision, Inspection and Quarantine, China Fire Products Qualification Assessment Center, and "3c" quality certification.

　　The company's main products include PS series fixed fire monitor, PL series foam water dual-use monitor, PSY series mobile fire monitor, PSKD series fixed fire monitor, PSKDY series mobile fire monitor, automatic tracking and positioning jet extinguishing device, SSFT series ground fire hydrant, hydrant monitor integrated fire hydrant, PZK series fire gun base, PS series foam fire hydrant, PY series semi fixed (portable) foam fire extinguishing device, PHYM (L) series pressure proportional mixing device, PQ series foam gun, PHP series balanced foam proportional mixing device, PSG series foam fire hydrant Box, PC (L) series low expansion air foam generator, PT series fire turret, FQS series fire ball valve, steel tank fire cooling sprinkler, foam extinguishing agent and other more than 200 kinds of fire fighting supporting products.

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• Bidirectional sealed ball valve for fire water cannon