Fire Safe Design for Ball Valves – Fire Safe Ball Valve

Fire Safe Ball Valve Manufacturer(Fire Safe Design Ball Valve)

ZECO Fire Safe Ball Valve as per API 607 standard in Full / Reduced Port with Antistatic Device, Blowout Proof Stem with various choice of operation.

What is Fire Safe Ball Valve?

Fire-safe ball valves are valves designed to reduce downstream leakages and fugitive emissions in case they are exposed to high-temperature fires. Because most of the valves are made up of non-alloy materials for sealing, they have to maintain functionality even at high temperatures or fail in a predictable way that differentiates fire-safe ball valves and other types of ball valves. There are certain design and test standards considered in fire-safe ball valves. These standards are followed by the fire-safe ball valve manufacturers to ensure the valve can work as required. Fire-safe ball valves are operated manually using a hand lever or using an actuator. The actuator that can be used for fire-safe ball valves is electric or pneumatic. A fire-safe ball valve should be able to maintain its ability to contain pressure during and after a certain duration of fire exposure. A fire-safe ball valve is used because of possible flammable or hazardous fluid leakage from the valve in case of a fire outbreak. If a ball valve that does not fire safe is used and a fire occurs, it will cause fluid leakage from the valve stem. The fluid leakage will support the fire and make it grow bigger than before. As such, a fire-safe ball valve is needed so that it will not leak fluid when it gets exposed to fire. Fire-safe ball valves are mostly used in refining and chemical processing plants to help in handling flammable fluids. Fire-safe ball valve manufacturers are tasked to ensure a tight shut-off of the valve during and after fire outbreaks.

Other Applicable Standards of Fire Safe Ball Valve

• Face to face: ANSI B 16.10
• Flange dimensions: ANSI B 16.5
• Butt welded valve ends: ANSI B 16.25
• Pressure tests: API 598 / B 6 6755 Part 1
• Fire safe: API 607 4th Edition / API 6FA / BS 6755 Part II
• Design standard API 6D, BS EN ISO 17292, and ANSI B16.34

Fire Safe Design for Ball Valves

Fire safe design for a ball valve is a design that the material and the structure of the ball valve can pass a fire test with limited leakage to the atmosphere and downstream after fire exposure.

For internal leakage prevention, the upstream pressure will push the ball to the downstream metal seat to cut off the medium and prevent internal leakage when the soft seat is destroyed because of the fire. In addition, a fireproof packing of graphite at the metal seat ring can also prevent internal leakage.

For external leakage prevention, there will be two layers of sealing at all the possible external leakage points between stem & gland flange, gland flange & body, and body & adapter, one is an O-ring, and the other is a graphite gasket. The secondary graphite gasket will prevent external leakage when the O-ring sealing is burnt.

Generally speaking, the fire testing of the ball valve is carried out as per API 6FA, API 607, ISO 10497, or BS 6755 Part II.

Features of Fire Safe Ball Valve

• Blowout Proof Stem
• Anti Static Device
• Space saving.
• Fire Safe Seat Design
• Double Body Sealing Ensures Positive Body Joint Sealing Against Pipeline Stresses
• Multiple Stem Sealing
• Live loaded Stem Design Meets Stringent Fugitive Norms
• Specially designed seats and seals in a variety of materials to suit specific applications

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