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Gate Valves

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Gate Valves

 

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