Half Ball Valve

Half ball valve is a rotary spool with hemispherical structure to control the fluid through or regulation of the valve, its core component is a hemispherical ball crown (not a complete sphere), the use of eccentric or straight-through design to achieve the opening and closing, suitable for particles, high viscosity or corrosive media.

Structure composition

• Valve body and bonnet: the main structure, split design for easy maintenance, some models with side-mounted (single-side sealing structure) or extended neck (low-temperature scenarios).
• Eccentric shaft/stem: the core component to drive the rotation of the hemispherical spool, eccentric design to reduce the friction of the sealing surface.
• Ball crown (spool): hemispherical structure, mirror-polished surface, and the valve seat to form a sealing vice, some hard seal models surface plated carbide.
• Seat and sealing ring:
• Metal seal: Surfacing cemented carbide (such as 1Cr13), high temperature and erosion resistance.
• Non-metallic seal: PTFE, RTFE and other polymer materials, corrosion resistance and low coefficient of friction.
• Auxiliary components: anti-blow-out valve stem, spring compensation device, self-cleaning flow path, etc.

Specification

• Nominal diameter: DN15～DN600 (large-calibre models up to DN1200).
• Pressure level: Class150～Class900 (high pressure model supports 42MPa).
• Connection: flange, threaded or clamped, side-mounted type is compact and easy to install.

 

GNEE Half ball valve

 

Features and Advantages

• Opening and closing without friction: eccentric structure makes the ball crown rotate after detaching from the valve seat, avoiding wear of the sealing surface and prolonging the life.
• Self-cleaning ability: flow channel full pass design, media flushing can remove impurities from the valve seat, reduce jamming.
• Reliable sealing: wedge compression or spring compensation structure, adapt to pressure fluctuations and achieve zero leakage.
• Resistant to harsh media: hard seal structure can handle solid particles, high viscosity or strong corrosive fluids.
• Convenient operation: 90°rotation opening and closing, low torque, support manual, electric or pneumatic drive.

Applications

• Energy and chemical industry: oil and gas transmission, gas industry, liquefied natural gas (LNG) systems.
• Metallurgy and Power: High temperature steam piping, coal dust and ash handling, industrial gas control.
• Environmental protection and municipal: sewage treatment, heating network (adapted to media containing impurities).
• Paper and food: high viscosity slurry, fibre suspension and other special fluid control.

• Complex media adaptability: the only type of valve that can simultaneously handle particulate, highly viscous and corrosive media.
• Low maintenance costs: Side-mounted construction supports in-line maintenance without the need to dismantle pipework.
• Long cycle operation: self-cleaning and wear-resistant design significantly reduces the frequency of downtime maintenance.
• Economy: small flow resistance (close to the straight pipe), low energy consumption, the overall cost-effective than gate or globe valves.

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