เดอะ Fisher H120 series consists of direct-operated relief valves designed for economical pressure protection. These valves serve as reliable safety devices for gas systems where atmospheric discharge is acceptable. To assist engineers in optimizing safety protocols, this guide details the structural integrity and functional benefits of the H120 product line.
01 Technical Design and Operating Principles
เดอะ Fisher H120 operates through a simple direct-acting mechanism. This ensures a rapid response during overpressure events.
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Internal Construction: The Fisher H120 features a pre-installed fixed spring retainer. The inlet pressure tap mounts directly to a spring-loaded lifting assembly. This assembly incorporates a high-quality Nitrile (NBR) valve disc.
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Relieving Action: Inlet pressure may exceed the mechanical force of the spring setpoint. In this case, the lifting assembly and valve disc move away from the metal seat.
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Discharge Path: This action allows excess gas to vent directly to the atmosphere. When pressure drops below the spring setting, the spring forces the disc back onto the seat. This process effectively reseals the system.
Fisher H120 actual product image
02 Key Performance Features
เดอะ Fisher H120 series is engineered for durability. It integrates easily into existing piping systems.
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Compact and Economical: The streamlined design allows for installation in tight spaces. It is ideal where larger pilot-operated valves are impractical.
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Durable Construction: The Fisher H120 is built for harsh field conditions. It provides long-term service with minimal maintenance requirements.
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Protective Options: An optional protective cap is available. It prevents debris, insects, or rain from entering the vent. This ensures the valve remains operational in outdoor environments.
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Material Compatibility: The standard NBR disc provides excellent sealing. It works well with various non-corrosive gas media.
03 Application Environments
The Fisher H120 is used when gas can safely discharge to the atmosphere. It is suitable for systems with some relief tolerance. Common applications include:
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Farm tap gas systems.
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Industrial gas headers.
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Residential and commercial gas regulation stations.
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Air and inert gas service lines.
04 Procurement and Technical Support
Verify the required spring range and connection sizes when sourcing the Fisher H120. This ensures the safety integrity of the system. Xi’an Yunrui Trading Co., Ltd. (Yunrui) assists industrial users in procuring genuine Fisher safety equipment.
Technical support includes help with spring selection. We verify that the Fisher H120 configuration matches the relief capacity required for the site. Maintaining stock in the Xi’an warehouse minimizes lead times for urgent upgrades. Specialized logistics ensure international shipments comply with regional safety standards. This provides a reliable supply chain for global industrial projects.
