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Hard Seal Concealed Stem Gate Valve

Product Overview:
The Hard Seal Concealed Stem Gate Valve—also known as a civil air defense brass core valve—is designed to maintain sealing integrity under harsh and emergency conditions. Unlike conventional valves, it resists rust and long-term wear, making it ideal for civil defense systems, shock-absorption pipelines, and unstable flow applications.

This can be used in combination with explosion-proof wave valves to enhance system stability during pipeline vibration or emergencies.


Key Features:

  • Design & Structure: Lightweight, safe, and durable. Enhanced material strength ensures even stress distribution and aesthetic finish.

  • Sealing Surface: Integrated brass alloy valve plate with surfacing welding technology provides low friction and temperature resistance, ensuring reliable operation and low torque.

  • Easy Operation: Light to open and close, simple to maintain.


Technical Specifications:

  • Flange End: ANSI150LB / GB Standard / BS Standard

  • Stem Material: 2Cr13 / Stainless Steel

  • Bonnet & Body Material: Ductile Iron QT450

  • Seal Material: Ductile Iron QT450 + NBR

  • Surface Finishing: Epoxy Coating (Red / Blue)

  • Working Pressure: 10 / 16 Bar

As a dependable , Fujian Spark Valve Co., Ltd offers comprehensive valve solutions for complex infrastructure and civil safety systems.


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