UL Flanged Resilient Seated OS&Y Gate Valve

The UL Flanged Resilient Seated OS&Y Gate Valve is a high-reliability fluid control component certified for fire safety and industrial use. Its OS&Y design and resilient sealing ensure easy maintenance and zero leakage in critical pipelines.

• Product Name：UL Flanged Resilient Seated OS&Y Gate Valve
• Material：Ductile Iron (ASTM A536 65-45-12) / Cast 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：16 - 40 bar (232 - 580 psi)，PN16/PN40 (Class 150/300)
• 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：Anti-Slip Handwheel; 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

Enterprise Atlas:

Email:

linhaifeng117@gmail.com

Inquiry Now

Product Details

———

Product Formation

Engineered to meet UL 262 and API 598 standards, this gate valve features an Outside Screw & Yoke (OS&Y) structure that keeps the operating screw external, preventing fluid contamination and enabling visual open/closed status checks—vital for emergency response. Constructed with a ductile iron (ASTM A536 65-45-12) or cast carbon steel (ASTM A216 WCB) body, it offers exceptional structural strength, while the 316 stainless steel stem and EPDM/NBR resilient seat deliver superior corrosion resistance and bubble-tight sealing (ANSI/FCI 70-2 Class VI). Designed for Class 150/300 pressure ratings (1.6-4.0 MPa) and operating temperatures ranging from -29℃ to 121℃, it fits DN50-DN400 pipelines with ANSI B16.5 flanged connections, ensuring universal compatibility. Epoxy powder coating (RAL 5010 Blue) enhances durability in harsh environments, making it ideal for fire protection systems, potable water networks, and industrial fluid lines. NSF/ANSI 61 compliance further validates its safety for drinking water applications, combining regulatory approval with long-term operational efficiency.

KEY WORDS： UL OS&Y Gate Valve, Resilient Seated Flanged Valve, Class 150 Fire Valve, ANSI B16.5 Gate Valve, Bubble-Tight Gate Valve, Ductile Iron OS&Y Valve, NSF 61 Water Valve, China, manufacturers, suppliers, wholesale, factory

———

Product Features

1.UL-Certified Safety: Complies with strict UL 262 standards, guaranteeing seamless integration into fire protection systems and reliable performance during emergencies.

2. OS&Y Structural Advantage: External screw design simplifies maintenance by isolating internal components from fluid; non-rising stem saves installation space and allows instant status verification.

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

4. Durable & Corrosion-Resistant: 316 stainless steel trim and epoxy coating protect against rust and chemical erosion, extending service life in outdoor and industrial settings.

5. Universal Compatibility: Covers DN50-DN400 sizes and Class 150/300 pressure ratings, with ANSI B16.5 flanges fitting most standard pipeline configurations.

6. Effortless Operation: Anti-slip knurled handwheel reduces torque for easy handling; optional gear operator is available for large-diameter models (DN≥250).

———

Product Parameter

Model	UL-OSY-RSGV-150 (Customizable)
Product Category	UL Certified Flanged Resilient Seated OS&Y Gate Valve
Core Structure	Outside Screw & Yoke (OS&Y), Non-Rising Stem, Resilient Seated
Nominal Diameter (DN)	DN50 (2") - DN400 (16"), Full Bore Design
Pressure Rating	Class 150 (PN16) / Class 300 (PN40) Optional, Working Pressure: 1.6MPa-4.0MPa
Temperature Range	-29℃ to 121℃ (-20℉ to 250℉), Suitable for Wide Temperature Applications
Body Material	Ductile Iron (ASTM A536 65-45-12) / Cast Carbon Steel (ASTM A216 WCB)
Trim Components	Stem: 316 Stainless Steel (ASTM A479); Disc: Ductile Iron + EPDM/NBR Seal
Sealing System	Resilient Seat (EPDM for Water, NBR for Oil); PTFE Stem Packing (Anti-Leak)
Connection Standard	Flanged (ANSI B16.5 Class 150/300; EN 1092-1 PN16/PN40 Optional)
Operation Mode	Handwheel (Cast Iron, Anti-Slip Knurling); Gear Operator (DN≥250 Optional)
Flow Performance	Kv Value: 85 - 1800 m³/h (Low Flow Resistance, Energy Saving)
Leakage Class	ANSI/FCI 70-2 Class VI (Bubble-Tight, Zero Leakage at Rated Pressure)
Testing Standard	Shell Test: 2.4MPa (Class 150); Seat Test: 1.76MPa (Per API 598 & UL 262)
Protection Grade	IP68 (Stem Seal); Epoxy Powder Coating (RAL 5010 Blue, Anti-Corrosion)
Compatibility	Fire Protection Systems, Potable Water Pipelines, Industrial Fluid Networks
Key Certifications	UL Listed, NSF/ANSI 61, ISO9001, CE, FM Approved (Optional)
Typical Dimensions (DN100)	Length: 305mm; Width: 220mm; Height (with Handwheel): 410mm
Net Weight (DN100)	32 kg

———

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!

——

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！