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The OS&Y (Outside Screw and Yoke) Grooved End Gate Valve is designed for reliable on/off control in fire protection, water supply, and industrial piping systems.
Featuring a visible rising stem and grooved end connections, this valve allows easy installation, clear valve position indication, and dependable performance under high-pressure conditions.
With a resilient seated design and epoxy-coated surfaces, it ensures excellent sealing, corrosion resistance, and long service life, making it suitable for both fire protection and general fluid applications.
| Size | 2''-12'' (DN 50-DN 300) | |
| Grooved OS&Y Gate Valve Main Parts and Material | Body | Ductile iron as A536, 65-45-12 |
| Bonnet | Ductile iron as A536, 65-45-12 | |
| Resilient wedge disc | Ductile iron as A536, 65-45-12 + EPDM | |
| Stem | SS304/SS304/SS420/SS431 | |
| Yoke | Ductile iron as A536, 65-45-12 | |
| Handwheel | Ductile iron as A536, 65-45-12 | |
| Flanged OS&Y Gate Valve Main Parts and Material | Body | Ductile iron as EN-GJS 450-10 |
| Bonnet | Ductile iron as EN-GJS 450-10 | |
| Resilient wedge disc | Ductile iron as EN-GJS 450-10+EPDM | |
| Stem | SS304/SS304/SS420/SS431 | |
| Yoke | Ductile iron as EN-GJS 450-10 | |
| Handwheel | Ductile iron as EN-GJS 450-10 | |
| Butterfly Valve Main Parts and Material | Body | Ductile iron as A536, 65-45-12 |
| Shaft | SS431 | |
| Disc | Ductile iron+EPDM/NBR | |
| Signal gearbox | Housing/cover: Ductile iron | |
| Worm | Carbon steel Or Ductile iron | |
| Handwheel | Ductile iron as A536, 65-45-12 | |
| Certificate | Fire valve | FM/UL |
| water valve | Wras / NSF61 | |
| Standard | fire valve | UL 262/AWWAC 515,EN11 71,UL 1091/MSS SP-67 |
| water valve | GB/BS5163,DIN3352 F4 DIN F5,JIS,KS 10K,AWWA C515,ANSI | |
| Connection | Grooved as AWWA C606, Flange as ASME B16.1,Flange as BS EN1092-2 | |
| Flange Standard | CLASS 150,PN10/16/25. Table D/E/F. 10K/16K/20K | |
| Temperature | 0℃-100℃ | |
| W.Pressure | 350psi | |
The OS&Y grooved end gate valve adopts a resilient seated wedge structure, providing tight shut-off and smooth flow when fully open.
The rising stem design allows operators to visually confirm whether the valve is open or closed, improving operational safety and system management.
Grooved end connections enable fast and secure installation without welding or threading, significantly reducing installation time and labor costs, especially in large-scale projects.
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OS&Y Rising Stem Design
Provides clear visual indication of valve position (open or closed), enhancing operational safety.
Low Operating Torque
Designed for smooth operation, requiring lower torque while maintaining high pressure performance.
High Pressure Capability
Suitable for working pressures up to PN25, ensuring stable performance in demanding systems.
Replaceable Upper Sealing Under Pressure
The upper sealing components can be replaced while the pipeline is under water supply, minimizing downtime.
Full Bore, Straight-Through Flow Path
When fully open, the gate completely leaves the flow channel, reducing flow resistance and preventing debris accumulation.
Durable Epoxy Coating
Both internal and external surfaces are coated with high-quality epoxy powder, providing uniform coverage and enhanced corrosion protection.
Hygienic & Safe Coating
The epoxy coating supports use in applications involving potable water, beverages, food processing, and pharmaceutical systems.
Fire protection systems (sprinkler and water-based fire fighting networks)
Water supply and distribution systems
Industrial piping systems
Commercial and infrastructure projects
Beverage, food processing, and pharmaceutical pipelines
Mechanical rooms and pump stations
Factory production
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Faq
Q1: What does OS&Y mean?
A: OS&Y stands for Outside Screw and Yoke, indicating that the stem rises externally when the valve is opened, allowing easy visual confirmation of valve status.
Q2: What are the advantages of grooved end connections?
A: Grooved ends allow fast installation without welding or threading, reduce installation time, and simplify maintenance or replacement.
Q3: Is this valve suitable for fire protection systems?
A: Yes. The OS&Y grooved end gate valve is widely used in fire protection systems due to its clear open/close indication and reliable shut-off performance.
Q4: Can the valve operate under high pressure?
A: Yes. The valve is designed to handle working pressures up to PN25, ensuring stable performance in demanding conditions.
Q5: Can maintenance be performed without shutting down the system?
A: The upper sealing components can be replaced while the system remains under water pressure, helping reduce system downtime.
Q6: Is the valve suitable for potable water or food-related applications?
A: Yes. The epoxy-coated internal surface provides corrosion resistance and supports use in potable water, beverage, food, and pharmaceutical applications.
