L&T – Gate Valves – Pressure-seal

Gate Valves – Pressure-seal
Size : 3″ to 42″ (80 mm to 1050 mm)
ASME Class : Class 600 to 4100
Design Standard : ASME B 16.34, API 600
Beyond Standards:

• Pressure-seal Gate Valve design conforms to ASME B 16.34.
• The design was successfully validated by conducting in-house High Pressure High Temperature (HPHT) Gas Tests on ultra-high pressure valve prototypes.
• Flow Interruption Test successfully conducted on 8″ Class 600 Pressure-seal Gate Valve suitable for Main Stream Isolation Valve (MSIV) service in nuclear power plants – at Areva, Germany.
• Fugitive Emission – 14″ Class 2500 Pressure-seal Gate Valve (test pressure of 431 bar at ambient and 289 bar at 400 degree C) has been tested successfully as per ISO 15848-1, endurance Class CO2 and Tightness Class BH
• CE Marking – Meets requirements of Pressure Equipment Directive 2014/68/EU, Annexure III, Module H
• Atex – Meets requirements of Atex Directive 94/9/EC (ATEX), category 2 non-electrical equipment
• SIL3 Safety Integrity Level for Automated Valves
• Pressure-seal Gate Valves (up to Class 2500) used in Oil & Gas industry tested to ISO 15848-1 Class BH
• Pressure-seal Gate Valves successfully tested to Shell Design Validation Test 77/300 and witnessed by Shell Inspectors

Features that Add Value:

• Valves in intermediate classes reduce total cost of ownership
• Pressure-Seal mechanism utilizes line pressure to enhance seal; ensures sealing integrity at higher operating pressures.
• Higher hardfacing thickness (3 mm) to ensure consistent hot hardness
• Disc guides hardfaced for longer life
• Customised deposition process in F91/ C12A valves to avoid delamination of hardfaced surfaces
• Live loading of bonnet bolts for F91/ C12A valves
• Special high purity graphite packing (seven rings) provided for pressure rating > Class 2500 in Power applications
• Live loading of bonnet bolts and gland bolts for all valves in F91/ C12A construction

Versatile Solutions:

• Available in a cast and forged steels and exotic metallurgies for a wide variety of applications
• By-pass arrangement provided for over-pressure protection based on customer requirement
• Accessories: Heat Dissipation Bonnets, Dashpot Arrangement, Limit Switches, Extension Spindles and Position Indicator
• ValvTrac™ RFID tagging offered for reliable digital traceability