Velan - Bolted Bonnet Bellows Seal Flexible Wedge Gate Valves

• Bellows monitoring port (optional): Connected to the space above the bellows to monitor performance.
• Non-rotating stem prevents torsion of bellows.
• Two secondary stem seals: a) Backseat in open position; b) Graphite packing.
• Forged for higher safety: Increased toughness, strength and fatigue resistance.
• Two-part bellows.
• Low torque due to: a) Non-rotating stem prevents torsion of bellows; b) Stem nut thrust bearings; c) Central lubrication.
• Seating faces hardfaced with CoCr alloy, ground and lapped.

Size range(s)

• NPS 2 1/2 - 6
• (DN 65 - 150)

Pressure rating

• ASME Classes 600 - 1500

Standard connections

• Butt weld