UL Flanged Resilient Seated OS&Y Gate Valve

The UL Flanged Resilient Seated OS&Y Gate Valve is a fire-safe, bubble-tight valve engineered for critical fluid control. Its UL certification and OS&Y structure ensure reliability in fire protection and industrial pipelines.

• Product Name：UL Flanged Resilient Seated OS&Y Gate Valve
• Material：Ductile Iron (ASTM A536 65-45-12) / Cast Carbon Steel (ASTM A216 WCB); 316 Stainless Steel Stem; EPDM/NBR Seal
• Size：DN50 - DN400 (2" - 16")，Flanged (ANSI B16.5 Class 150/300)
• Nominal Pressure：PN16/PN40 (Class 150/300)，1.6 - 4.0 MPa (232 - 580 psi)
• Operating Temp：-29°C to +121°C (-20°F to 250°F)
• Certification：UL Listed, NSF/ANSI 61, ISO9001, CE, FM Approved (Optional)
• Leakage Class：ANSI/FCI 70-2 Class VI (Bubble-Tight)
• Operation Mode：Handwheel (Anti-Slip); Gear Operator (Optional for DN≥250)
• OEM Service：Accepted
• Delivery Terms：FOB, CFR, CIF, EXW, DAP, DDP
• Payment Mode：T/T, L/C, PayPal, Western Union, Escrow

Product category:

UL/FM Gate valve

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Product Details

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Product Formation

Designed with a full-bore, non-rising stem and Outside Screw & Yoke (OS&Y) configuration, this valve enables easy maintenance and visual open/closed status verification—essential for emergency scenarios like fire outbreaks. Crafted from high-grade ductile iron (ASTM A536 65-45-12) or cast carbon steel (ASTM A216 WCB), it boasts exceptional durability, while the 316 stainless steel stem and EPDM/NBR resilient seat guarantee anti-corrosion performance and zero leakage (ANSI/FCI 70-2 Class VI). Rated for Class 150/300 pressure (1.6MPa-4.0MPa) and operating temperatures from -29℃ to 121℃, it fits DN50-DN400 pipelines and features ANSI B16.5 flanged connections for universal compatibility. UL listing, NSF/ANSI 61 compliance, and epoxy powder coating (RAL 5010 Blue) make it suitable for potable water systems, fire sprinkler networks, and industrial fluid lines, balancing safety, longevity, and operational efficiency.

KEY WORDS： UL OS&Y Gate Valve, Resilient Seated Gate Valve, Flanged Fire Valve, Class 150 Gate Valve, ANSI B16.5 Gate Valve, Fire Protection Gate Valve, Bubble-Tight Gate Valve, Ductile Iron OS&Y Valve, China, manufacturers, suppliers, wholesale, factory

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Product Features

1.UL-Certified Fire Safety: Meets UL 262 and API 598 standards, ensuring seamless integration with fire protection systems and reliable performance during emergencies.

2. OS&Y Maintenance Advantage: Outside screw design keeps internal components free from fluid contamination; non-rising stem saves installation space and allows quick status checks.

3. Bubble-Tight Sealing: Resilient EPDM/NBR seat and PTFE stem packing achieve ANSI Class VI leakage rating, eliminating waste and ensuring system integrity.

4. Durable Construction: Corrosion-resistant materials (316 stainless steel, epoxy coating) and robust ductile iron/steel body withstand harsh industrial and outdoor environments.

5. Universal Compatibility: Class 150/300 pressure ratings, DN50-DN400 size range, and ANSI B16.5 flanges fit most standard pipelines.

6. Easy Operation: Anti-slip knurled handwheel (or optional gear operator for large sizes) reduces torque, enabling effortless opening/closing even after long-term use.

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Product Parameter

Model	Customizable (e.g., UL-OSY-GV-03 / RSGV-FL-UL)
Product Type	UL Certified Flanged Resilient Seated OS&Y Gate Valve
Valve Design	Outside Screw & Yoke (OS&Y) Structure; Resilient Seated, Non-rising Stem
Nominal Diameter (DN)	DN50 - DN300 (2 inch - 12 inch)
Nominal Pressure (PN)	PN16 / Class 150 (1.6MPa / 232 psi)
Working Temperature Range	-20℃ to 80℃ (-4℉ to 176℉)
Body Material	Ductile Iron (ASTM A536 Grade 65-45-12) / Cast Steel (ASTM A216 WCB)
Trim Material	Stem: 304 Stainless Steel; Disc: Ductile Iron with EPDM Rubber Seal
Sealing Material	EPDM / NBR (Resilient Seat); PTFE Packing (Stem Seal)
Connection Type	Flanged (ANSI B16.5 Class 150; EN 1092-1 PN16 Optional)
Operation Method	Handwheel (Cast Iron, Anti-Slip); Gear Operated (Optional for DN≥200)
Flow Characteristic	Full Bore, Low Flow Resistance (Flow Coefficient Kv: 80 - 1200 m³/h)
Leakage Class	ANSI/FCI 70-2 Class VI (Bubble-Tight Sealing)
Pressure Test Standard	Shell Test: 2.4MPa; Seat Test: 1.76MPa (Per API 598)
Protection Level	IP67 (Stem Seal); Handwheel with Weatherproof Cover (Optional)
Application Scenarios	Fire Protection Systems, Water Supply Networks, Industrial Pipelines, HVAC Systems
Certification	UL Listed, FM Approved (Optional), ISO9001, CE, NSF/ANSI 61 (Drinking Water)
Product Dimensions	DN100 Example: 320mm (L) × 220mm (W) × 380mm (H) (Including Handwheel)
Net Weight	DN100 Example: 28 kg

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FAQ

Q: Can you accept sample order?

A: Yes, we accept samples with little and reasonable charge.But need customer pay sample fees and transport fees first.

Q: What is your payment terms?
A: Payment supports T/T, L/C, etc.

Q: How can l get my order?
A: We will send you the goods by UPS,DHL,FedEx,Oversea Shipment or other forwarder, all with tracking number.

Q: Why choose us?
A： With over 15 years of experience in the fire protection industry, our company has professional technical personnel and many well-known partners in the domestic market. We offer favorable prices and guarantee quality, having passed multiple certifications!

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With more than 15 years of experience serving clients, we have developed extensive expertise and in-depth industry knowledge, enabling us to deliver reliable and effective solutions tailored to your requirements.
We provide professional technical support and customized service offerings. Our committed technical team is available to assist you with product consultation, installation guidance, and comprehensive after-sales support whenever necessary.
At Sheng Feng Fire, our professionals are dedicated to helping you select the most suitable products based on your specific needs.
Please do not hesitate to contact us for further information！