The Flanged Rising Stem Gate Valve (Outside Screw and Yoke pattern) provides reliable bi-directional isolation for heavy-duty industrial piping systems. The visible rising stem clearly indicates open and closed positions at a glance. Built with bolted bonnets and solid wedge discs, this valve handles high-flow media with minimal pressure drop.
Manufacturing Proof: Fabricated in our 12,000 m² machining facility using multi-axis CNC vertical lathes to ensure strict body-bonnet flange alignment and direct spectrographic material verification prior to assembly.
Technical Specifications
|
Parameter |
Specification Range |
|
Size Range |
DN50 to DN600 (NPS 2 to 24) |
|
Pressure Rating |
PN16, PN25, PN40 / ASME Class 150 to 300 |
|
Body Materials |
ASTM A216 WCB, ASTM A351 CF8M, Ductile Iron (GGG50) |
|
Trim Materials |
F304, F316, 13Cr overlay, Monel |
|
Design Standards |
API 600, API 6D, ISO 10434, DIN 3352 |
|
Flange Connections |
ASME B16.5, EN 1092-1, JIS B2220 |
|
Operation |
Handwheel, Bevel Gearbox, Electric Actuator, Pneumatic Actuator |
Key Features
OS&Y Construction: The operating thread is located outside the valve body, isolating it from line media to prevent corrosion and mineral buildup.
Flexible Wedge Design: A precision-guided solid or flexible wedge accommodates thermal expansion and pipeline stress, preventing binding at high temperatures.
Renewable Backseat Seal: Allows safe stuffing box repacking while the valve is fully open and under active system pressure.
Precision Stem Machining: Stems feature trapezoidal threads rolled on dedicated thread-rolling machines for smooth operation and minimal torque requirements.
Applications
Water Treatment & Municipal: Raw water intakes, distribution mains, and desalination high-pressure pump stations.
Oil & Gas & Petrochemical: Tank farm isolation, utility lines, and non-critical hydrocarbon processing units.
Power Generation: Cooling water circuits, condensate lines, and auxiliary steam distribution networks.
Industrial HVAC: Large-scale chilled water loops and central heating plant distribution.
OEM & Customization
We support project-specific specifications and private-label manufacturing based on engineered drawings.
Material Modifications: Special alloy trims (Hastelloy, Inconel) and low-temperature carbon steel (LCC/LCB) certified for sub-zero environments.
Actuation Mounting: Custom top-flange drilling (ISO 5210) machined to match specific electric or pneumatic actuator torque requirements.
End Connections: Special face finishes (Raised Face, Ring Type Joint, Flat Face) machined on heavy-duty vertical lathes.
Testing, Quality & Documentation
Every valve undergoes 100% factory pressure testing on automated hydraulic test benches prior to dispatch.
Pressure Testing: Shell tested at 1.5x rating and seat tested at 1.1x rating per API 598 / ISO 5208 standards.
Material Traceability: Heat numbers are hard-stamped on valve bodies and trims, directly cross-referenced with Mill Test Certificates (EN 10204 3.1).
Quality Control: In-house chemical composition analysis via direct-reading spectrometer and ultrasonic non-destructive testing (NDT) on critical pressure-containing castings.
FAQ
Q: What is the main advantage of a rising stem over a non-rising stem gate valve?
A: The rising stem provides a clear, visual position indicator from a distance. Furthermore, the operating threads stay outside the fluid path, protecting them from corrosive media and scaling.
Q: Can these valves be installed in vertical pipelines?
A: Yes, provided proper support brackets are utilized to manage the eccentric load and weight of heavy gearboxes or actuators.
Q: What documentation accompanies each shipment?
A: Standard documentation includes Material Test Certificates (EN 10204 3.1), individual pressure test reports, GA dimensional drawings, and installation manuals.
Request a Quote
To receive a formal engineering quotation, please provide your project operational parameters:
Nominal diameter (DN / NPS) and pressure rating (PN / Class)
Body and trim material compliance requirements
Operating medium, temperature, and working pressure
Actuation type (Manual handwheel vs. Gearbox / Electric Actuator)
[Submit Specification / Request Quotation]
Hot Tags: flanged rising stem gate valve, China flanged rising stem gate valve manufacturers, suppliers, factory
