Fire Hydrant Ball Valve

Fire hydrant ball valve is a key valve used in fire protection system to control the fire hydrant branch pipe or dry pipe media on and off, through the rotation of the ball with a through hole to achieve the opening and closing operation. Its core structure includes:

Valve body: mostly made of brass or stainless steel, taking into account the corrosion resistance and structural strength;
Ball: full bore design of high-precision ball (surface hardening treatment), to ensure that the fluid resistance is minimised;
Seal components: soft seal material (such as PTFE) or metal hard seal, adapt to the fire water pressure and water quality requirements;
Operating mechanism: handle or gear box drive, support rapid 90 ° rotation opening and closing.
Core performance features
Fast response: 90° rotation can complete the full open/closed action, to meet the fire emergency needs;
Reliable sealing: sealing grade up to VI (zero leakage), to ensure that there is no leakage under long-term hydrostatic working conditions;
Pressure resistance: conventional models have pressure resistance ratings of PN16~25, and the high pressure version can reach PN40 (suitable for fire pump outlet piping);
Low maintenance: modular design allows online replacement of seals, reducing system downtime;
Compatibility: suitable for fire-fighting media such as clean water, foam mixture, etc., and has a certain tolerance for water particles.

 

fire hydrant ball valve

 

Selection and use of norms
Pressure matching: Select the valve body material and seal type according to the design pressure of the fire protection system (stainless steel + metal hard seal is preferred for high-pressure scenarios);
Installation direction: It is recommended to install the valve horizontally with the valve stem facing upwards to avoid leakage due to deformation of the sealing surface by gravity;
Media restrictions: fire water containing a large number of solid particles need to be pre-filter, to avoid wear and tear of the sealing surface;
Maintenance cycle: check the elasticity of sealing ring every 2 years, full valve pressure test every 5 years.

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