In China’s modern infrastructure construction, GB standard valves play a crucial role in ensuring the reliability and safety of water supply and municipal engineering systems. “GB” stands for Guobiao, meaning “National Standard,” representing China’s unified technical framework for industrial production and quality control. For valve manufacturing, GB standards define the design, material, pressure rating, and testing methods that guarantee stable performance in long-term operation.
GB standard valves are designed in accordance with China’s national technical requirements, including GB/T 12220 (valve marking), GB/T 13927 (pressure testing), and GB/T 12235 (steel gate valve design), among others.
These standards ensure that every valve—whether gate, globe, check, or butterfly type—meets strict performance criteria for pressure resistance, sealing integrity, corrosion protection, and dimensional accuracy.
By following GB standards, manufacturers can provide consistent quality across large-scale projects, minimizing the risk of leaks, malfunctions, or safety incidents in public infrastructure.
In urban water supply and distribution networks, GB standard valves are essential for flow control, isolation, and pressure regulation.
Common valve types used include:
Gate Valves (GB/T 12234): For full-bore isolation and minimal flow resistance.
Butterfly Valves (GB/T 12238): Ideal for large pipelines due to lightweight design and cost efficiency.
Check Valves (GB/T 13932): Prevent backflow and protect pumps and pipelines.
Globe Valves (GB/T 12235): Provide precise throttling control in treatment and purification systems.
Municipal projects demand long service life and easy maintenance. GB standards define rigorous test procedures—such as hydrostatic, shell, and seat leakage tests—to ensure durability under continuous water pressure and variable flow conditions.
Municipal engineering involves water treatment plants, wastewater systems, heating pipelines, and urban drainage networks. GB standard valves ensure:
Compatibility and interchangeability among domestic suppliers.
Stable performance under temperature, pressure, and chemical variations.
Environmental compliance, meeting China’s sustainable development policies.
Ease of inspection and maintenance, thanks to standardized design dimensions and materials.
In large public projects, GB valves are often preferred for their proven reliability and cost-effectiveness compared to imported equivalents.
Typical materials specified under GB standards include cast iron (HT200/HT250), ductile iron (QT450-10), carbon steel (WCB), and stainless steel (CF8/CF8M).
These materials ensure excellent mechanical strength, corrosion resistance, and adaptability to different media such as potable water, seawater, and wastewater.
Leading manufacturers such as Yuanda Valve Group adopt advanced casting, CNC machining, and non-destructive testing technologies to ensure every GB valve meets strict inspection requirements before delivery.
GB standards are aligned with ISO 9001 quality systems, meaning valves produced under GB specifications undergo:
Dimensional inspection
Pressure and leak testing
Surface treatment verification
Marking and traceability control
This ensures consistent product reliability, helping municipal engineers and contractors maintain stable water supply operations over decades.
As one of China’s leading valve manufacturers, Yuanda Valve Group Co., Ltd. produces a full range of GB standard gate valves, globe valves, check valves, butterfly valves, and strainers.
With decades of engineering experience and large-scale production capacity, Yuanda ensures:
Full compliance with GB/T standards
Customization options for special media or temperature conditions
Fast delivery and after-sales support for domestic and export projects
GB standard valves are the foundation of reliable water supply and municipal engineering systems in China. Through standardized design, robust material selection, and strict quality control, they ensure safety, efficiency, and sustainability across cities and infrastructure networks.
With its strong technical background and production expertise, Yuanda Valve continues to support both national and international projects, delivering valves that meet the highest performance and durability requirements.
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