Self Sealing Gate Valve
High-temperature, high-pressure isolation valves built with a specialized pressure-seal bonnet. As internal pipeline pressure rises, the self-energizing silver-plated sealing ring compresses tighter against the valve body retainer ring, delivering leak-proof performance on superheated steam headers and supercritical power boilers.
Design Criteria & Manufacturing Specifications
Manufactured strictly to international engineering codes with 100% factory pressure testing, full EN 10204 3.1 / 3.2 material traceability, and accredited third-party witness support.
| Engineering Parameter | Applicable Codes, Standards & Design Criteria |
|---|---|
| Design Standard | ASME B16.34, API 600, ISO 10434 |
| Bonnet Architecture | Pressure Seal Self-Energizing Bonnet with Segmented Thrust Ring |
| Alloy Steel Casting Scope | ASTM A217 WC6, WC9, C12A (P91 equivalent) for high creep strength |
| Seat Hardfacing | Co-Cr-A (Stellite Gr.6) hardfacing with minimum 2.0 mm finished thickness |
| Stem Backseat | Precision conical backseat integral with bonnet for packing relief |
Self Sealing Gate Valve Standard & Engineered Models
TSV manufactures an engineered lineup of Self Sealing Gate Valve configurations for global oil & gas transmission pipelines, refinery manifolds, power plants, and severe industrial processes. Each unit undergoes 100% hydrostatic and pneumatic factory acceptance testing before dispatch.
Pressure-Seal High Pressure Power Plant Gate Valve
Engineered for high-temperature superheated steam and supercritical boiler feed systems. Internal pressure wedge gasket tightens as pressure increases.
Butt-Weld Alloy Steel Superheated Steam Pressure Seal Valve
Butt-welded end connection matching heavy schedule piping (SCH 160 / XXS) for main steam isolation in coal and combined cycle gas turbine plants.
Electric Motorized Thermal Power Pressure Seal Gate Valve
Fitted with intelligent multi-turn electric actuator with high torque thrust base for rapid emergency isolation of turbine steam admission headers.
Forged Body Ultra-High Pressure Seal Gate Valve
Precision forged F91/F22 alloy unibody designed for ultra-supercritical (USC) power stations operating above 25 MPa pressure thresholds.
Supercritical Power Station Bypass Pressure Seal Gate Valve
Features an external high-pressure bypass equalizer line to balance differential pressure across the wedge prior to opening, preventing stem overload.
Pressure Seal Bonnet Self-Energizing Sealing Under Superheated Steam
Utilizes internal line pressure to wedge flexible graphite gaskets against bonnet rings, sealing tighter as pressure rises.
100% Hydrostatic Acceptance
Every valve is pressure-tested per API 598 / API 6D Rate A with zero allowable bubble leakage prior to factory crating.
EN 10204 3.1 Certified
Certified Mill Test Reports (MTR) with optical emission spectrometer chemical composition and mechanical impact values.
Global OXY Approved Supplier
Audited and approved on the global master vendor list (#24) of Occidental Petroleum for severe upstream duties.
Explore All 4 Gate Valve Sub-Categories
1:1 aligned with TSV factory catalog. Navigate to specialized casting, forged steel, slurry knife gate, or power station pressure-seal configurations.
Casting Gate Valve
API 600 heavy-wall bolted bonnet cast steel (WCB, LCC, WC6) flexible wedge gate for refinery manifolds.
API 600 Heavy Wall View Casting Gate Valve →Forged Steel Gate Valve
API 602 compact forged alloy (A105, F316, F11) for severe high-pressure auxiliary vents, drains, and skids.
Class 800 - 2500 View Forged Steel Gate Valve →Knife Gate Valve
MSS SP-81 beveled stainless blade shearing through abrasive slurry, mineral tailings, and pulp lines.
Slurry & Mining View Knife Gate Valve →Self Sealing Gate Valve
Pressure-seal flexible graphite ring tightening under supercritical steam line pressures for power plants.
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