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Enclosed Spring Safety Valve - Flanged Pressure Relief for Harmful Media | DELCO
The DELCO A42Y Series is a heavy-duty Enclosed Spring Safety Valve designed for the overpressure protection of pipelines containing toxic, flammable, or polluting media. Its fully closed bonnet ensures discharged fluid is piped away without leaking into the environment. Available in WCB or Stainless Steel, with Customizable Set Pressures and ANSI/DIN/JIS flanges to meet strict industrial safety standards.
Material: WCB, Stainless Steel etc.
Flange Standard: GB / ANSI /DIN /JIS etc.
Set Pressure (Ps): Support Customized
Applicable Medium: Water, air, harmfulgases/liguids
Features
Engineered for critical safety, this valve combines a leak-proof enclosed design with precise pressure relief capabilities:
✅Enclosed Design for Hazardous Media: Unlike open-type valves, the fully enclosed bonnet and cap prevent the discharged medium from escaping into the atmosphere. This is essential for handling harmful gases, chemicals, and liquids, protecting both operators and the environment.
✅Customizable Set Pressure (Ps): We precisely calibrate the opening pressure (Set Pressure) at the factory according to your project requirements. The spring mechanism ensures rapid, full-lift opening when pressure limits are exceeded and reliable reseating.
✅Corrosion-Resistant Materials: Available in Carbon Steel (WCB) for general industrial use, or Stainless Steel (304/316) for corrosive, acidic, or sanitary applications, ensuring a long service life in harsh chemical environments.
✅Universal Flange Compatibility: Features standardized flange connections compliant with GB, ANSI, DIN, and JIS. This ensures seamless installation into global piping systems without the need for adapters.
✅Broad Application Versatility: While optimized for harmful fluids, it effectively controls pressure for water, air, steam, and oil. The sealing surface is hardened to resist erosion, maintaining a tight seal over repeated relief cycles.
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Key Application Fields
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Oil & Gas
DELCO API-certified valves ensuring safety and reliability in demanding high-pressure pipelines. -
Chemical & Petrochemical
DELCO corrosion-resistant solutions tailored for handling aggressive acids and hazardous fluids safely. -
Power Generation
DELCO solutions efficiently withstand extreme high-temperature and high-pressure steam cycles in power plants. -
Food & Pharmaceutical
DELCO sanitary valves with FDA-compliant, crevice-free designs to ensure absolute product purity. -
Water & Wastewater
Durable municipal solutions by DELCO, designed for zero leakage and long-term sustainability. -
HVAC & District Heating
DELCO valves ensure precise flow regulation to optimize energy efficiency in modern buildings.
Browse our case studies or talk directly with our engineers to discuss your application.
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