The Flanged OS&Y Gate Valve is engineered for industrial fluid systems requiring positive shut-off and clear visual indication of open/closed status. The outside screw and yoke design keeps valve threads isolated from the working medium, preventing stem corrosion and scaling in aggressive environments. Built with a ductile iron body and bronze/stainless steel trim, it handles water, oil, and gas media across municipal, fire protection, and industrial pipelines.
Technical Specifications
|
Parameter |
Specification Details |
|
Size Range |
NPS 2" to 24" (DN50 to DN600) |
|
Pressure Rating |
PN16 / PN25, Class 150 |
|
Body Materials |
Ductile Iron (ASTM A536 Gr. 65-45-12 / GGG50), Cast Steel (WCB), Stainless Steel (CF8M) |
|
Stem Material |
Stainless Steel (ASTM A276 Type 420 / 316) |
|
Seat Type |
Resilient Seated (EPDM/NBR) or Metal-to-Metal (Bronze/SS) |
|
Flange Standard |
ASME B16.5, EN 1092-2, ISO 7005-2 |
|
Face-to-Face |
ASME B16.10, ISO 5752 Series 3 |
|
Operation |
Handwheel, Gearbox, Electric Actuator, Pneumatic Actuator |
|
Certifications & Compliance |
CE / PED 2014/68/EU, ISO 9001, UL/FM aligned options available for fire protection services |
Key Features
Visual Open/Closed Position: The rising stem design moves outward as the gate opens, allowing technicians to verify valve position instantly from a distance.
Non-Wetted Stem Threads: Operating threads sit outside the valve body, protected from media contact, reducing operating torque and preventing thread jamming.
Wedge Design: Flexible or solid wedge options ensure tight bubble-shutoff under both high and low differential pressure.
Low Flow Resistance: Straight-through flow path minimizes pressure drop and turbulence when fully open.
Backseat Sealing: Features a renewable backseat design enabling stem seal replacement under pressure (where applicable by specification).
Applications
Municipal Water Supply & Treatment: Raw water intake, distribution mains, and filtration loops.
Fire Protection Systems: Main control headers and sprinkler supply lines (fully compliant with structural safety and pressure margins).
HVAC Systems: Chilled and condenser water loops in commercial or industrial complexes.
Industrial Process Lines: General utility water, cooling water, and non-corrosive chemical transport.
OEM & Customization
We support OEM manufacturing and project-specific engineering modifications:
Material Variations: Custom trim materials (Monel, Aluminium Bronze) for corrosive marine or chemical environments.
Coating Specs: Fusion Bonded Epoxy (FBE) coating applied to min. 250 microns thickness, compliant with AWWA C550.
Actuation Mounting: ISO 5211 top flange dimensions machined to accept specific electric or pneumatic actuators per client specification.
Private Labeling: Cast-on logos, laser-etched nameplates, and custom export crating.
Testing, Quality & Documentation
Every production batch undergoes strict verification before dispatch:
Pressure Testing: 100% tested per API 598 / EN 12266-1 (Shell test at 1.5x working pressure; Seat test at 1.1x working pressure).
Dimensional Inspection: Coordinate Measuring Machines (CMM) verify face-to-face and flange bolt circle tolerances.
Traceability: Heat codes stamped on valve bodies corresponding to material test reports (MTRs) per EN 10204 3.1.
Quality Standard: Manufactured under ISO 9001 certified quality management systems.
FAQ
Q: What is the standard coating thickness for the valve body?
A: Standard fusion-bonded epoxy (FBE) coating is applied at a minimum thickness of 250 microns, tested for pinholes using a high-voltage holiday detector.
Q: Can these valves be installed in a vertical pipeline orientation?
A: Yes, provided a proper support bracket is used for larger sizes (DN300 and above) to offset actuator/gearbox weight moment.
Q: What documentation is provided with each shipment?
A: Each shipment includes Material Test Certificates (MTRs), pressure test reports, dimension drawings, compliance declarations (CE/PED), and installation/maintenance manuals.
Request a Quote
Send your project specifications to our engineering team for a formal quotation, lead time assessment, and technical support.
Required RFQ Details: Size, Pressure Rating, Quantity, Standards, and Actuation type (if applicable).
Email: sales@keylionvalve.com
Response Time: Within 24 business hours.
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