High-Pressure Y-Pattern Globe Valve

The High-Pressure Y-Pattern Globe Valve features an inclined stem structure that reduces flow fluid turbulence and internal body wear during high-velocity throttling. Built for pressure ratings up to ASME Class 2500, this configuration incorporates hardfaced sealing surfaces to maintain tight shut-off under severe thermal cycling and high differential pressure.

45-Degree Inclined Axis: Aligns the stem with the flow path, optimizing the fluid flow coefficient (Cᵥ) and decreasing total pressure drop across the body.

Pressure Seal Bonnet: Leverages internal process pressure to compress the sealing gasket, ensuring joint integrity at elevated operating pressures.

Stellite Hardfaced Seating: Cobalt-base alloy cladding on seat and disc contact zones resists particle erosion, cavitation damage, and high-temperature oxidation.

Non-Rotating Linear Stem: Axial movement without rotational torque prevents shear stress on graphite packing rings, minimizing external stem leakage risks.

Full-Length Disc Guiding: Secures inner plug alignment against cross-flow vibrations during high-pressure isolation service.
 

Body Configuration: Monoblock forged carbon steel or alloy steel body with wall thickness meeting ASME B16.34 specifications.

Bonnet System: Pressure-assisted sealing structure for Class 900 to Class 2500 rating ranges.

Packing Assembly: Flexible die-formed graphite rings backed by top and bottom anti-extrusion braided metallic rings.

Backseat Mechanism: Integrated hardfaced body backseat allows packing chamber isolation under depressurized line conditions.

System flow passes through an angled fluid passage positioned 45 degrees to the main pipe line. Actuation forces drive the guided plug along this oblique angle directly onto the body seat ring. The linear disc movement reduces localized velocity peaks, distributing hydraulic impact evenly along the internal fluid channel during partial opening.

Butt-Weld Ends (BW): Machined to ASME B16.25 for high-pressure welded piping networks.

Socket Weld Ends (SW): Manufactured per ASME B16.11 for small-bore piping systems up to DN50.

Flanged Ends: Raised Face (RF) and Ring Type Joint (RTJ) dimensions executing ASME B16.5 requirements.

Manual Drive: Handwheel with impactor mechanism or enclosed spur gear box.

Electric Actuator: Multi-turn electric drive equipped with mechanical torque limiters and continuous position transmitters.

Pneumatic Actuator: Linear spring-return diaphragm or double-acting cylinder for automated process control.

Manufacturing Norms: Compliance with ASME B16.34, API 602, and BS 1873.

Pressure Testing: 100% hydrostatic shell verification at 1.5 times working pressure, followed by high-pressure seat closure testing per API 598.

Non-Destructive Testing (NDT): Dye penetrant testing on hardfacing surfaces, ultrasonic testing on forged bodies, and 100% positive material identification.

Main Steam Lines: System isolation and pressure containment under elevated temperature conditions.

Boiler Feedwater Service: Throttling fluid control with reduced erosion risk across internal components.

Chemical Processing Units: Isolation of severe process fluids requiring tight sealing performance.

High-Pressure Drain Lines: Controlled depressurization and vent service in high-head piping systems.

Pressure & Temperature Verification: Match operational parameters against ASME B16.34 rating tables to select correct body material.

Flow Capacity Rating (Cv): Confirm internal port dimensions satisfy minimum velocity requirements to prevent fluid cavitation.

End Connection Style: Select Butt-Weld ends for permanent high-pressure installation or RTJ Flanges where maintenance disconnects occur.

Actuation Sizing: Evaluate stem thrust values under maximum differential pressure to size manual gearboxes or powered drives.

Material Traceability: EN 10204 3.1 inspection certificates covering chemical analysis and mechanical testing of pressure parts.

Test Records: Certified hydrostatic, pneumatic seat leakage, and non-destructive examination reports.

Dimensional Inspection: Measured reports verifying end-to-end dimensions, wall thickness, and connection profiles.

Specialized Materials: Custom body forging options in Hastelloy, Inconel, Monel, or Titanium alloys.

Extended Bonnets: Thermal insulation extension bonnets for severe high-temperature service.

Stem Sealing Options: Live-loaded spring packing sets or zero-emission bellows seal bonnet arrangements.