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
What standards and connection types are available for Wanlian valves?
Wanlian valves are manufactured to GB, ANSI, DIN and JIS standards on request. Flanged, grooved, wafer and threaded connections are available depending on the model. Tell our engineers your DN/PN and connection type in the inquiry and we will confirm the matching configuration.
What materials are used for the valve body and sealing?
Bodies are typically ductile iron (QT450), cast iron or cast/forged steel depending on the model. Sealing elements use EPDM or NBR rubber, and stems are stainless steel (2Cr13/304). Material options can be customized for specific media and temperature ranges.
What is the MOQ and lead time?
Standard MOQ is typically 20 units per model for stock sizes, with production lead times of 15-30 days depending on quantity and customization. Sample orders are available for pre-shipment testing.
How are the valves tested before shipment?
Every valve undergoes 100% shell and seat pressure testing in accordance with the applicable standard (e.g. GB/T13927, EN 12266-1). Test reports and third-party inspection can be arranged on request.
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