Pressure Seal Angle Pattern Globe Valves (Alternative Design Solutions)

About this product

ALTERNATIVE DESIGN SOLUTIONS There are a large variety of available valves and valve configurations for a wide variety of purposes and conditions not tabulated in this catalogue. Some example are listed below. Other valve designs or customised configurations are available on request, contact bfe for special requirements. The Angle pattern globe valve is a modified version of "T"-Pattern Globe valve with inlet and outlet at right angles. When fitted at a change in piping direction, this valve eliminates a bend and has the advantage of smaller pressure drop than a conventional "T" pattern globe valve. Angle valves have the same features of stem, disc and seat ring design as the globe valve. The fundamental difference between the two is that the fluid flow through the angle valve makes a 90° turn. These valves offer less resistance to flow than a globe valve with an elbow which it would replace. An angle valve reduces the number joints in a line, in addition to saving installation time. They are also used in applications that have periods of pulsating flow because of their capability to handle the slugging effect of this type of flow.

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.