Pressure Seal "T"-Pattern Globe Valves — Basic Configuration, Welding Ends

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PRODUCT FEATURES: • End-to-End acc.to ASME B16.10 - Short Pattern. • Butt welding ends acc.to ASME B16.25. NOTE 1: End-to-End acc.to ASME B16.10 Long Pattern. NOTE 2: ASME B16.10 does not specify any value for Short Pattern, selected End-to-End acc.to ASME B16.10 Long Pattern. NOTE 3: ASME B16.10 does not specify any value, selected End-to-End acc.to Manufacturer Standard. PRESSURE SEAL "T" PATTERN GLOBE VALVES SKETCHES DESIGN TYPE 1SH DESIGN TYPE 1SG • CLOSE DIE FORGED BODY • PRESSURE SEAL SCREWED RETAINER • CLOSE DIE FORGED BODY • PRESSURE SEAL SCREWED RETAINER • GEAR OPERATED • HANDWHEEL OPERATED DESIGN TYPE 1CG DESIGN TYPE 3CG • CLOSE DIE FORGED BODY • PRESSURE SEAL SEGMENTAL RING • GEAR OPERATED • OPEN DIE FORGED BODY PILLAR YOKE TYPE • PRESSURE SEAL SEGMENTAL RING • GEAR OPERATED

From the catalogue's introduction to this valve type: PRESSURE SEAL VALVE DESCRIPTION Pressure seal design is an alternative design to the traditional bolted-bonnet approach to sealing the body/ bonnet joint. Pressure seal valves are the best option for the high- pressure steam industry and for all applications where designers continue to push boiler, HRSG, and piping system pressure/temperature envelopes. It is the perfect technological match for the welding expertise that now make excellent, high integrity butt- weld ends common place. The beauty of the pressure seal design is that as system pressure builds, so does the load on the bonnet and, consequently, the pressure seal gasket. Therefore, in pressure seal valves, as the system pressure increases, potential leakage through the body/bonnet joint decreases: the higher the internal pressure, the tighter the seal. The pressure seal bonnet joint also eliminates the body/ bonnet flanges reducing weight and simplifying the application of exterior insulation. However, due to its reliance on system pressure to aid in sealing, pressure seal valves are best applied in high pressure systems, the design is typically available in pressure classes from ASME 600. PRODUCT FEATURES 1. No pressure retaining body-bonnet flanges or bolting. 2. Forged structure for all pressure containing parts. Optimized design for thermal fatigue required for power plant where frequent start-ups & shut-downs are the must. 3. Flanged valves are provided with flanges integral to the valve body forging or full penetration welded. 4. Lighter weight design compared to bolted bonnet. 5. High quality packing for reliable tightness and low emission performance. 6. Sealing surfaces are machined to the tightest tolerances and lowest roughness and to ensure reliable sealing & long service life. 7. Best-in-Class CV values. 8. Outside Screw and Yoke (OS&Y). 9. Low operation torque design. 10. Self aligning two piece packing gland. 11. Graphite based Pressure seal gasket with metal anti- extrusion caps. 12. Low fugitive emission design.