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Fire Sprinkler System
- Standard Response Fire Sprinkler
  - FM Approved Standard Response Fire Sprinklers for Reliable Fire Protection
- Quick Response Fire Sprinkler
Fire Protection Valve
- Flanged Gate Valve
- Grooved Gate Valve
Fire Monitor
- Anti-Explosion Fire Monitor

Fire Protection Gate Valves for Sprinkler and Fire Water Piping Systems

NONFIR supplies fire protection gate valves for water-based fire protection systems, including flanged and grooved OS&Y gate valves. These products are designed for fire sprinkler piping and supplied to fire protection distributors, contractors, and project procurement teams worldwide.

Grooved OS&Y Gate Valve for Fire Protection Systems
NONFIR Grooved OS&Y Gate Valve is a rising stem gate valve manufactured for fire protection piping systems, providing shut-off control for sprinkler and water-based fire suppression networks.
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Flanged OS&Y Gate Valve for Fire Protection Systems
NONFIR Flanged OS&Y Gate Valve is a rising stem gate valve designed for fire protection piping systems. It features an Outside Screw and Yoke (OS&Y) structure with flanged ends for installation in sprinkler systems, fire water supply...
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Fire Protection Gate Valves
NONFIR Fire Protection Gate Valves are manually operated isolation valves used to control water flow in fire protection piping systems. They are installed in sprinkler systems, fire hydrant networks, fire pump rooms, and other fixed...
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FM Approved Valve
FM Approved OS&Y Flanged Gate Valve is a fire protection gate valve designed for on/off isolation of water flow in sprinkler and fire protection piping systems.
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Fire Fighting Gate Valve
NONFIR Fire Fighting Gate Valve is a flanged gate valve used for on/off control in fire protection water supply systems. It is mainly installed in sprinkler systems, fire hydrant networks, and other fixed fire suppression pipelines for...
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Cast Iron Gate Valve
NONFIR Cast Iron Gate Valve is a manually operated valve for on/off isolation in fire protection water supply pipelines. It is primarily used in fire sprinkler systems, fire hydrant networks, and fire water mains in commercial,...
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Gate Valve for Fire Protection System
NONFIR fire protection gate valves are used to isolate water flow in fire sprinkler systems, fire pump systems, and industrial fire protection pipelines. Available in flanged OS&Y configurations, they are designed for fixed water-based...
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Gate Valve Stem
Gate Valve Stem is the operating shaft component installed inside an OS&Y gate valve, connecting the operating mechanism with the gate assembly to control valve opening and closing. NONFIR manufactures stainless steel gate valve stems...
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Industrial Gate Valve
It is used for pipeline isolation in applications such as fire sprinkler networks, fire water distribution systems, and industrial utility water lines where reliable shut-off control is required.
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Grooved End Gate Valve
Grooved End Gate Valve is a resilient seated gate valve designed for on/off isolation in fire protection piping systems. It uses grooved end connections for installation with grooved piping systems and is commonly applied in fire...
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Gate Valve Dimensions
NONFIR Grooved Gate Valve is an OS&Y gate valve developed for fire protection piping systems, providing grooved connection compatibility, FM/UL certified performance, and documented technical information for sprinkler system projects.
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Water Main Gate Valve
NONFIR Water Main Gate Valve is a grooved end gate valve developed for fire protection piping systems requiring reliable water supply isolation. It is installed on fire water mains, sprinkler supply lines, and hydrant networks where...
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Fire Protection Gate Valve Specifications

Our fire protection gate valve range includes flanged and grooved OS&Y configurations. The specifications below summarize our published product range; exact ratings and materials depend on the selected model.

Parameter	Published Product Information
Valve Type	Outside Screw and Yoke (OS&Y) Gate Valve
Nominal Size	2–12 in. (DN50–DN300)
Working Pressure	300–350 psi, depending on model
End Connections	Flanged / Grooved
Flanged Connection References	BS EN 1092-2 / ANSI flange configurations, depending on model
Grooved Connection Reference	AWWA C606
Valve Standards Referenced	EN 1171 / AWWA C515, depending on model
Additional Flange Standard Referenced	ASME B16.1, where applicable
Body Material	Cast iron / ductile iron, subject to model specification
Stem Material	Stainless steel, where specified
Sealing Material	Rubber / EPDM, subject to model specification

Flanged vs Grooved OS&Y Gate Valves

Flanged and grooved OS&Y gate valves perform the same primary isolation function but use different pipe connection methods. The appropriate configuration depends on the specified piping interface, installation requirements, and project design.

Selection Criteria	Flanged OS&Y Gate Valve	Grooved OS&Y Gate Valve
End Connection	Bolted flange connection	Mechanical grooved coupling
Piping Interface	Matching pipe flanges	Compatible grooved pipe ends and couplings
Connection Verification	Flange dimensions, bolt pattern, facing, and pressure class	Groove dimensions, coupling compatibility, and pressure rating
Installation Requirements	Flange alignment, gasket selection, and bolt assembly	Groove preparation, gasket selection, and coupling assembly
Typical Selection Basis	Piping systems designed for flanged connections	Piping systems designed for grooved connections

Final valve selection should follow the approved piping design and the connection requirements of adjoining components.

UL Listings and FM Approvals

Published Certification Information

Our fire protection valve catalog references UL Listings and FM Approvals. These certifications are subject to the scope of the relevant product records.

Approval Coverage

Approval coverage is determined by the specified valve model, nominal size, pressure rating, and connection configuration.

Certification Documentation

Buyers may request available certification records to support project submittals and verify compliance with the specified approval criteria.

About NONFIR

Manufacturing Facility

NONFIR's manufacturing operations are supported by a team of more than 115 employees covering production, inspection, and technical support.

Automated Sprinkler Production

Our facility uses automated equipment for fire sprinkler manufacturing, supporting machining, assembly, and product testing operations.

International Supply

NONFIR supplies fire protection equipment to overseas markets, including the Middle East, Southeast Asia, Russia, and South America.

Quality Control and Testing

NONFIR applies inspection procedures during manufacturing to verify product performance and consistency.
Material Inspection
Incoming materials and components are checked against specified requirements, including material type, dimensions, and supplier documentation where applicable.
Hydrostatic Pressure Testing
NONFIR fire protection gate valves undergo hydrostatic testing before shipment. The valve body and sealing performance are verified under the specified test pressure with a minimum 2-minute holding time according to the applicable standards.
Operation Testing
Each valve is checked for opening and closing operation to verify smooth movement of the stem, gate, and operating mechanism.
Leakage Inspection
Valve sealing performance is inspected to identify leakage issues before shipment.
Traceability and Inspection Records
Applicable production and inspection records can be provided according to project requirements, including product identification, test information, and quality documentation.

Procurement Support for Fire Protection Projects

Valve Selection Assistance

NONFIR can review customer requirements for nominal size, pressure rating, and pipe connection to help identify suitable flanged or grooved OS&Y gate valve configurations.

Technical Submittal Documents

Buyers can request available product datasheets, dimensional drawings, and material information for engineering evaluation and project submissions.

Bulk Order Coordination

Distributors and project procurement teams can submit model requirements, quantities, and destination details for quotation. Lead times, packaging, and shipping arrangements are confirmed according to the order.

Frequently Asked Questions

Q: Can NONFIR OS&Y gate valves be fitted with supervisory switches?

A: A supervisory switch must be compatible with the selected NONFIR valve's stem and yoke arrangement. Confirm the mounting dimensions and switch model before installation.

Q: How much installation clearance does an OS&Y gate valve require?

A: Allow sufficient space above the handwheel for the stem to rise fully, with access for operation and maintenance. Required clearance depends on the selected valve's dimensions.

Q: Can OS&Y gate valves be installed vertically or horizontally?

A: Installation orientation depends on the valve design and piping arrangement. The stem position, pipe support, and operating access must be checked against the selected model's installation instructions.

Q: Can NONFIR OS&Y gate valves replace valves from other manufacturers?

A: Replacement requires matching face-to-face dimensions, connection geometry, pressure rating, and project approval requirements. Identical nominal sizes do not guarantee a direct fit.

Q: Are NONFIR OS&Y gate valves suitable for underground installation?

A: Underground service requires a valve configuration designed for burial and accessible operation. Our standard OS&Y configurations should not be assumed suitable for direct burial without model-specific confirmation.

Q: Can OS&Y gate valves be used in seawater or corrosive environments?

A: Suitability depends on the valve's body material, protective coating, stem, and seals. Standard fire-water configurations should not be specified for corrosive service without checking material compatibility.

Q: Can an OS&Y gate valve regulate water flow?

A: OS&Y gate valves are intended primarily for fully open or fully closed isolation service. Continuous throttling is not recommended unless the specific valve is designed and rated for it.

Q: How can operators identify the position of an OS&Y gate valve?

A: The rising stem provides a visible indication of valve position. A raised stem generally indicates an open valve, while a lowered stem generally indicates a closed valve.

Q: What should be checked before returning an OS&Y gate valve to service after maintenance?

A: Confirm that the valve operates freely, is restored to its required normal position, and that any supervisory switch functions correctly. Follow the approved fire protection system inspection and restoration procedures.

As one of the most professional fire protection valve manufacturers and suppliers in China, we have world-leading production equipment and strong manufacturing capabilities. Please feel free to buy advanced fire protection valve at competitive price from our factory.