Demco Butterfly Valves | SLB

Demco butterfly valves

Long-term maintenance-free performance

Rendering of a Demco butterfly valve.

Resilient-seated Demco™ butterfly valves are durable, lightweight, and ideal for a wide range of applications where space is at a premium.

Sizes: 2–36 in
Pressures: Up to 285 psi

Engineered for long-term, maintenance-free performance, these valves are used in a range of industries:

  • chemicals and petrochemicals
  • agriculture
  • oil and gas drilling and production
  • food and beverage
  • water and wastewater
  • cooling towers (HVAC)
  • power
  • mining and materials
  • dry bulk handling
  • marine industry (on ships and vessels).

The dry stem journal reduces potential for leakage and protects the stem from process media. A hard-backed cartridge seat with an integral seal ensures optimal sealing between multiple styles of flange connections.

  • Lug and wafer style
  • Integral flange seal
  • Bidirectional sealing
  • Hard-backed cartridge seat
  • Dry stem journal
  • Positively oriented disc