Mintex Industrial Supply
Non-rising Gate Valve - UL/FM
Non-rising Gate Valve - UL/FM
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A Non-Rising Stem (NRS) Gate Valve with UL/FM certification is commonly used in fire protection systems. Unlike an OS&Y valve, the stem in an NRS gate valve does not move upward when the valve is opened, making it ideal for installations in confined spaces. The UL/FM certification ensures that the valve meets rigorous safety standards required for fire protection applications.

Product Applications for Non-rising Gate Valve - UL/FM
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Underground Fire Protection Systems
Purpose: Used in underground fire water mains to control water flow to hydrants and fire sprinkler systems.
Reason: The non-rising stem design is compact and ideal for confined spaces, such as valve boxes or underground installations, while the UL/FM certification ensures the valve is reliable and safe for fire protection use.
Benefit: Reduces space requirements and maintenance needs in underground installations, while maintaining the high standards required for fire safety.
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Building Sprinkler Systems
- Purpose: Installed in the piping of fire sprinkler systems within commercial or industrial buildings.
- Reason: The NRS valve’s compact design allows for installation in tight spaces, such as mechanical rooms or ceilings, where visibility of the stem is limited, and the UL/FM rating guarantees performance in fire protection scenarios.
- Benefit: Provides reliable water control for sprinkler systems while maximizing available space, ensuring compliance with fire safety regulations.
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High-Rise Buildings and Parking Garages
Purpose: Used in fire suppression systems for high-rise buildings and parking structures, where space for valve installation is limited.
Reason: Non-rising stem valves are suitable for compact installations, where vertical space for stem movement is restricted, and the UL/FM certification ensures that they meet fire safety codes for high-pressure systems.
Benefit: Optimizes space utilization in buildings with height constraints, ensuring dependable performance in fire emergencies without requiring additional room for the valve stem.