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LEOCO offers a comprehensive range of Fire Protection Valves designed for reliable flow control, isolation, and protection in sprinkler, fire pump, hydrant, standpipe, and deluge systems. Our range includes Fire Butterfly Valves, Fire Grooved Check Valves, Flanged Check Valves, Fire OS&Y Gate Valves, NRS Gate Valves, Grooved Alarm Check Valves, and Deluge Valves, available in various sizes, connection configurations, and pressure ratings according to project requirements.
Designed for demanding fire protection applications, these valves can be specified with relevant UL and FM certifications where applicable to the individual product and configuration. They are suitable for commercial buildings, industrial facilities, warehouses, petrochemical plants, power projects, infrastructure, and other applications where dependable fire-water control is essential. Explore LEOCO Fire Protection Valves for quality-focused products aligned with applicable fire protection standards and project specifications.
Fire protection valves are critical components of sprinkler, hydrant, standpipe, deluge, fire pump, and other water-based fire protection systems. Their primary purpose is to control, isolate, direct, or prevent the flow of water so that the fire protection network can operate as designed when required. Because these valves can form part of a life-safety system, selection should be based on the valve type, system pressure, connection, size, applicable approval or listing, and project requirements rather than appearance alone.
LEOCO’s Fire Protection Valves category includes Fire Butterfly Valves, Fire Grooved Check Valves, Flanged Check Valves, Fire OS&Y Gate Valves Flanged, Fire OS&Y Gate Valves Grooved, NRS Gate Valves Flanged, Grooved Alarm Check Valves, and Deluge Valves. These configurations cover important isolation, non-return, alarm, and automatic water-control functions used across fire sprinkler and fire protection installations.
For fire protection projects, approvals and listings are particularly important. NFPA reference material identifies UL 262 for gate valves, UL 312 for check valves, UL 1091 for butterfly valves, UL 193 for alarm valves, and UL 260 for dry-pipe and deluge valves, alongside corresponding FM standards for several fire-service valve categories.
Fire butterfly valves provide compact flow isolation in fire protection piping systems. Their quarter-turn operation allows the valve disc to move between the open and closed positions, making them suitable where space, accessibility, and quick operation are important.
Fire protection butterfly valves are commonly supplied in wafer, lugged, or grooved configurations, depending on the product design and project specification. Indicating arrangements can also provide visual or supervisory confirmation of valve position.
For fire protection service, butterfly valves fall under UL 1091, which covers butterfly valves intended for piping systems supplying water for fire protection service. FM also identifies indicating butterfly valves among fire-service water-control valve categories.
A fire grooved check valve is designed to permit water flow in one direction while preventing reverse flow. Grooved connections can simplify installation and maintenance where the fire protection piping system is designed around grooved mechanical joints.
Check valves are particularly important around fire pumps, water supplies, sprinkler risers, and other sections where reverse flow could affect system operation. FM guidance, for example, addresses check-valve installation on private fire service mains and fire pump discharge arrangements.
UL 312 covers check valves 1 NPS and larger used in piping systems supplying water for fire protection service and references applications including NFPA 13 sprinkler systems, NFPA 14 standpipe systems, NFPA 20 fire pumps, NFPA 22 water tanks, and NFPA 24 private fire service mains.
Flanged check valves provide non-return protection while using bolted flange connections. They are commonly selected where flanged piping, equipment connections, fire pump assemblies, or maintenance requirements make a flanged connection appropriate.
Depending on the design, a check valve may use a swing-type or other approved internal mechanism. The correct valve should be selected according to flow direction, pressure, installation orientation, hydraulic requirements, and the applicable project standard.
An Outside Screw and Yoke (OS&Y) gate valve provides positive isolation while allowing the stem position to be visually identified. As the stem rises or lowers during operation, its position provides a clear indication of whether the valve is open or closed.
OS&Y gate valves are widely associated with fire protection water-control arrangements. UL 262 specifically covers fire-protection gate valves of the outside-screw-and-yoke type as well as nonrising-stem types.
The flanged configuration is suitable for systems designed around bolted flange connections and can be selected for fire pump rooms, sprinkler control assemblies, risers, mains, and other applications where the project specification calls for a flanged isolation valve.
The grooved OS&Y gate valve combines the visible stem position of an OS&Y design with grooved pipe connections. This configuration can be useful for projects using grooved fire protection piping systems.
FM’s fire-service guidance identifies OS&Y gate valves and indicating butterfly valves as suitable indicating-valve arrangements in relevant private fire service applications.
A Non-Rising Stem (NRS) gate valve operates without the stem moving vertically outside the valve body. This makes the design useful where installation conditions require a more compact operating arrangement or where the valve is installed underground or in a confined space.
UL 262 includes NRS gate valves within its scope and identifies their use for above- or below-ground installation.
For buried or enclosed fire service applications, the valve arrangement, access, indication method, and installation details should be coordinated with the applicable fire protection design.
An alarm check valve is designed for sprinkler systems where water flow toward the sprinkler system needs to initiate an alarm function. The valve typically incorporates a clapper/check mechanism together with trim and alarm components according to the particular product design.
NFPA reference material identifies UL 193 for alarm valves for fire protection service and FM 1041 for alarm check valves.
The grooved connection allows the valve to integrate into a grooved piping system and can simplify assembly where the overall installation is designed for grooved mechanical connections.
A deluge valve is an automatic water-control valve used in deluge and related fire protection systems. Unlike a conventional wet-pipe sprinkler arrangement, a deluge system can be designed so that water is released into the downstream piping after the valve operates, allowing multiple open discharge devices to receive water.
UL 260 covers dry-pipe and deluge valves intended for automatic water supply to dry-pipe, deluge, and pre-action sprinkler systems.
Deluge valves are therefore selected according to the system design, actuation method, trim arrangement, pressure conditions, flow requirements, and applicable approval.
Exact dimensions and ratings vary by valve model, connection type, approval, and manufacturer. For website content, the following specification framework can be used without implying that every configuration has identical limits.
| Specification | Typical / Available Options |
|---|---|
| Valve types | Butterfly, Check, OS&Y Gate, NRS Gate, Alarm Check, Deluge |
| Connection types | Flanged, Grooved, Wafer/Lugged where applicable |
| Nominal sizes | Project/model dependent; commonly supplied in fire-service pipeline sizes |
| Pressure rating | Model and approval dependent; commonly specified by project pressure class |
| Body material | Ductile iron, cast iron, or other approved materials depending on valve type |
| Disc / clapper | Ductile iron, stainless steel, or engineered approved construction depending on model |
| Stem | Stainless steel or corrosion-resistant alloy, model dependent |
| Seat | Approved resilient elastomer or specified fire-service sealing material |
| Operation | Handwheel, gear-operated, supervisory/indicating, or automatic actuation |
| End connection | Flanged, grooved, wafer/lugged |
| Service | Water-based fire protection |
| Certification | UL Listed / FM Approved where applicable to the specific model |
| Installation | Sprinkler, fire main, pump, hydrant, standpipe, deluge and related systems |
| Testing | Hydrostatic, leakage, operational and certification-specific testing as applicable |
Important: pressure ratings, size ranges, materials, dimensions, and approvals should be stated against the specific LEOCO model/datasheet before publication. A UL or FM certification applies to the certified product configuration and conditions; it should not automatically be interpreted as applying to every valve in a product family. FM explains that its certification process evaluates products against applicable standards and that FM Approved products are listed through its approval system.
Fire protection valves must be selected according to the maximum working pressure of the system, not simply the normal operating pressure. The valve pressure rating should be equal to or greater than the pressure conditions specified by the fire protection system designer.
For example, a project may specify valves at 175 psi, 250 psi, 300 psi or another approved pressure rating, but the actual rating available for a particular LEOCO valve must be confirmed from its technical datasheet and certification. It is better to publish the model-specific rating than to apply one pressure figure to every valve type.
Hydraulic performance is also important. Valve selection can influence pressure loss within a fire protection system. FM hydraulic guidance, for example, includes equivalent-length information for different valve types and operating conditions, demonstrating why valve selection can form part of the hydraulic design rather than being treated only as an isolation requirement.
Fire protection valves are supplied in multiple nominal sizes to match sprinkler mains, branch connections, fire pumps, risers, hydrant networks, and other system components. Available sizes depend on the valve design.
Grooved valves are selected where the piping system uses grooved mechanical couplings, while flanged valves are selected for compatible flanged piping and equipment connections. Butterfly valves can provide a compact alternative to larger gate-valve arrangements, while OS&Y and NRS gate valves are used where the project calls for gate-style isolation.
The correct valve size should correspond to the connected pipe size and hydraulic design. Oversizing or undersizing a valve without engineering justification can affect system performance, installation, and maintenance.
Relevant standards depend on the exact valve type. Common references include:
These standards should be treated as product-specific certification references, not as a statement that every LEOCO valve automatically conforms to every standard listed above.
Fire protection valve documentation can be an important part of project approval and commissioning. Depending on the product and certification, documentation may include material information, dimensional data, pressure rating, installation instructions, operation instructions, test information, identification markings, and certification/listing details.
FM guidance also emphasizes accessibility for inspection, testing and maintenance for valves used in fire protection systems.
For project supply, buyers may request:
LEOCO fire protection valves can be specified for a range of water-based fire protection applications, subject to the individual valve’s approval and technical suitability, including:
UL 312, for example, identifies applications associated with NFPA 13, NFPA 14, NFPA 20, NFPA 22 and NFPA 24 among others.
Selecting the correct valve starts with identifying the function required: isolation, non-return, alarm activation, or automatic water control. The next considerations are nominal pipe size, connection type, pressure rating, flow direction, installation orientation, available space, operation method, and certification requirements.
For a fire protection project, the valve should also be compatible with the applicable system standard and project specification. UL and FM approvals should be checked against the exact model and configuration, rather than relying solely on a general product-family statement. UL provides Product iQ as a database for locating UL Listed and Certified products by product type, model and other identifiers.
Explore LEOCO’s range of Fire Butterfly Valves, Fire Grooved Check Valves, Flanged Check Valves, Fire OS&Y Gate Valves, NRS Gate Valves, Grooved Alarm Check Valves, and Deluge Valves for fire protection projects requiring reliable flow control and isolation. With options for grooved and flanged installations and certification-focused product requirements, the category can support specifications across commercial, industrial, infrastructure, energy, and fire protection applications.
For a project enquiry, provide the required valve type, nominal size, connection, pressure rating, quantity, applicable standard, and required UL/FM certification, so the appropriate configuration can be matched to the project specification.
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