Valves & Parts
UL/FM Fire Protection Resilient Seated OS&Y Gate Valve
UL and FM certified resilient seated OS&Y (Outside Screw and Yoke) gate valve with grooved ends for fire protection systems. Nodular cast iron body with rising stem indicator for clear open/closed position visibility.
Key Features
- UL and FM certified for fire protection service
- OS&Y rising stem design with clear position indication
- Grooved-end connections for fast mechanical coupling
- Nodular cast iron body with resilient seat for drip-tight closure
- OEM / ODM customization available
Technical Specifications
- Size Range
- 2" - 10" (DN50 - DN250)
- Material
- Nodular Cast Iron
- Connection
- Grooved Ends
- Media
- Water
- Operation
- Manual (OS&Y Rising Stem)
- Structure
- Gate Valve
- Temperature
- Normal Temperature
- Certification
- UL / FM Listed
- Customization
- OEM / ODM
Parts & Materials List
- Valve Body
- Nodular Cast Iron
- Stem
- Brass / Stainless Steel
- Seat
- Resilient (EPDM)
- Handwheel
- Ductile Iron
Applications
- Water supply & distribution
- Wastewater and sewage networks
- Industrial process pipelines
- HVAC systems
Quality & Testing
100% shell and seat pressure testing per GB/T13927 or EN 12266-1; epoxy resin coating tested for corrosion resistance.
Frequently Asked Questions
Is this OS&Y gate valve really UL and FM listed?
The model is listed for fire protection service. We confirm the exact listed model, certificate number and coverage per order, and the certificates travel with the documentation — always verify the number at the issuing body before acceptance.
Why specify grooved ends for fire mains?
Grooved ends use mechanical couplings instead of welding or bolting: faster installation, field alignment of the pipe run, and much quicker valve replacement — the standard choice for sprinkler and standpipe mains.
What does the rising stem of an OS&Y valve indicate?
The OS&Y (outside screw and yoke) rising stem shows valve position at a glance — fully raised means open, lowered means closed — which matters for monitored main isolation in fire systems.
What size range is available for the UL/FM OS&Y valve?
2 inch to 10 inch (DN50 to DN250) in nodular cast iron with an EPDM resilient seat for drip-tight closure, with OEM/ODM customization available.
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