L&T – Check Valves – Bolted Bonnet

Check Valves – Bolted Bonnet
Size : 2″ to 48″ (50 mm to 1200 mm)
ASME Class : Class 150 to 2500
Design Standard : BS 1868, API 594, ASME B 16.34

Beyond Standards:

• Check Valve design complies to BS 1868 and API 594
• Offered with API monogram
• Fugitive Emissions – Complies with ISO 15848-1 (<50 ppm)
• Compliance to Annex III Module H of Pressure Equipment Directive 2014/68/EU
• Check valves successfully tested to Shell 77/300 and witnessed by Shell Inspectors

Features that Add Value:

• Internal hinge design, no hole in the body, eliminates leakage path
• Inconel overlay/ cladded option available

Versatile Solutions:

• Swing check valves offered with damper arrangement for non-slam applications
• Options: Tilting Disc Check Valve, Axial Flow Check Valve, Stop Check Valve, Lift Check Valve, Steam Jacketed and FBE/Fusion-bonded Epoxy Lined Valves
• ValvTrac™ RFID tags for reliable digital traceability

Stainless Steel Corrosion-Resistant Check Valves

Special Features:

• Integral body seat. In-situ hardfacing provided for Trim 12 and 16 valves
• Internal hinge design eliminates additional leakage path
• Body-bonnet Joint – Class 150 Check Valves offered with square-shaped body-bonnet
• joints in size 2” and with ovalshaped joints in 3” size. Valves in all other sizes and pressure classes offered with circular body-bonnet joints.

Tilting Disc Check Valves

• The disc has a pivot axis closer to the flow-bore centre-line compared with Swing
  Check Valves.
• Disc seats against a conical surface on the seat ring
• Suitable for pulsating flow and fluid with particulates
• Low susceptibility to water hammer

Axial Flow Check Valves

Flow forces the disc open against spring force; when the flow is reversed, the spring quickly close the valve by forcing the disc against a seat

Axial Flow Check Valve offers lower pressure drop, lower reverse flows and low slamming