The Grooved Rising Stem Gate Valve provides reliable flow isolation and rapid mechanical installation for commercial plumbing, HVAC loops, and fire protection systems. Built with an outside screw and yoke (OS&Y) architecture, the rising stem translates linearly to offer immediate, line-of-sight valve position verification from a distance. Precision-engineered grooved ends enable rigid mechanical locking via standard grooved couplings, cutting assembly hours compared to flanged or welded alternatives.
Size Range: DN50 - DN300 (2 inches - 12 inches)
Working Pressure: 300 PSI (2.1 MPa)
Approvals & Compliance: UL Listed, FM Approved, and AWWA C606 compliant
Technical Specifications
|
Parameter |
Specification Details |
|
Nominal Size |
2 inches to 12 inches (DN50 - DN300) |
|
Rated Working Pressure |
300 PSI (2.1 MPa); Hydrostatically shell tested at 600 PSI |
|
Maximum Operating Temp |
120 deg C (250 deg F) |
|
End Connections |
Cut or rolled grooves conforming strictly to AWWA C606 |
|
Body & Bonnet |
Ductile Iron conforming to ASTM A536 Gr. 65-45-12 |
|
Wedge / Disc |
Ductile iron core, fully encapsulated with high-grade EPDM |
|
Stem Assembly |
OS&Y rising stem; Stainless Steel AISI 420 / 304 |
|
Internal Fasteners |
Stainless Steel; completely isolated from the fluid stream |
|
Surface Coating |
Fusion Bonded Epoxy (FBE) interior and exterior, min. 250 micrometers |
Key Features
Positive Visual Indication: The linear movement of the rising stem allows project inspectors to verify open or closed status instantly without mechanical aids.
Bubble-Tight Shutoff: The resilient EPDM-encapsulated ductile iron wedge ensures zero leakage under rated pressure, outperforming standard metal-seated alternatives.
Low-Torque Operation: An integrated bronze stem bushing minimizes friction between the stem and operating nut, ensuring smooth manual actuation after extended periods of inactivity.
Corrosion-Resistant Trim: Stainless steel stems and isolated internal fasteners prevent galvanic corrosion and stem binding in treated or stagnant water networks.
Optimized Flow Dynamics: Full-port body geometry minimizes head loss and eliminates turbulence across the valve assembly.
Applications
Fire Suppression Systems: Main control lines, sprinkler grids, and deluge system isolation (UL/FM certified installations).
Commercial HVAC Loops: Chilled and condenser water isolation in high-rise mechanical equipment rooms.
Municipal Utilities: Auxiliary water distribution networks requiring rapid mechanical joint integration.
OEM & Customization
Volume project support and OEM piping packager integrations include:
Supervisory Switch Bosses: Pre-drilled and tapped bonnet pads designed for direct mounting of dual-SPDT tamper switches.
Actuation Options: Manual handwheels or ISO 5211 direct-mount gearbox operators for larger, high-torque diameters.
Coating Alterations: High-build epoxy formulations tailored for aggressive underground soil or corrosive marine environments.
Traceability & Marking: Custom laser-etched nameplates, project tag stamping, and barcode labeling per client specification.
Testing, Quality & Documentation
In-house foundry casting and CNC machining lines govern quality from raw material to final boxing:
Material Traceability: Spectrometric chemical analysis performed on every heat of ductile iron; MTC 3.1 delivered with every batch.
Automated Pressure Testing: 100% shell and seat hydro-testing executed on automated test rigs per API 598 and UL 262 protocols.
Dimensional Control: CMM (Coordinate Measuring Machine) inspection of groove profiles to guarantee zero field mismatch with standard couplings.
Submittal Packages: Mill Test Certificates, UL/FM compliance documents, and dimensional drawings provided prior to shipment.
FAQ
Q: Are these valves fully certified for fire service applications?
A: Yes. Specific configurations carry active UL listings and FM approvals. Official certification numbers and AHJ submittal data packages are available upon request.
Q: Which grooved coupling brands are compatible?
A: Grooved ends strictly follow AWWA C606 dimensions, ensuring complete mechanical compatibility with standard rigid and flexible couplings from Victaulic, Anvil, and other global manufacturers.
Q: Can supervisory switches be field-installed?
A: Yes. Integral mounting bosses on the bonnet allow field installation of standard supervisory tamper switches without modifying the valve body.
Q: What are the standard lead times for container orders?
A: Standard production cycles run 25 to 35 days, backed by raw casting buffer stock to accommodate urgent project schedules.
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