Structural Characteristics of

•  Utilizing QT450-10 Ductile Iron with a 10% elongation rate, the valve exhibits exceptional toughness against instantaneous pressure pulsations caused by pump failure in municipal networks. This material significantly reduces the risk of rupture, offering superior seismic resistance and operational safety compared to gray iron alternatives.

• The internal streamlined full-port design ensures minimal flow resistance when the disc is fully open. In large-scale circulating pump systems, this feature drastically reduces fluid pressure loss, improving transfer efficiency while lowering long-term energy consumption and operational costs.

• Relying on the dual force of disc gravity and media back-pressure, the valve resets and seals instantly as flow velocity hits zero. This precise one-way control effectively prevents backflow, providing 24/7 protection for centrifugal pumps and precision meters against mechanical damage from reverse surges.

•  Both internal and external surfaces feature an electrostatic epoxy powder coating, creating a uniform protective layer over 250μm thick. This anti-corrosion barrier shields the body from acidic soil and meets potable water hygiene standards, ensuring media purity and solving secondary water pollution issues.

• The top-mounted Bolted Bonnet architecture allows for disc removal for cleaning or seal replacement without removing the valve from the line. This significantly shortens downtime during routine maintenance in industrial power networks, reducing labor intensity and operational complexity for technicians.

• Manufactured in strict accordance with GB/T standards, the flanges are compatible with multiple hole patterns, ensuring a perfect fit with major pipeline components. This high standardization eliminates size mismatches common in overseas infrastructure projects, making on-site assembly faster, more reliable, and highly versatile.

Materials for main parts

Class 150LB Main Connection Dimensions

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