Demco, part of the Cameron valve division was established in 1947. Demco is manufacturer of one of the most durable of all resilient-seated butterfly valves in the industry and the premier designed Gate Valve in the oil and gas drilling market, specifically engineered for the rigorous requirements of oilfield applications.
As one of the most durable resilient-seated butterfly valves in the industry, the Cameron butterfly-style DEMCO valve excels in a variety of applications.
Cast in both wafer and tapped lug patterns in a variety of material choices, butterfly-style DEMCO valves feature a one-piece body for reduced weight and increased strength.
The unique stem hole design in the disc ensures a dry stem journal. The hard-backed seat enables ease of installation, reliable operation, and infield repairability without special tools. Butterfly-style DEMCO valves are available in sizes 2 to 36 in [50 to 900 mm].
Engineered for long-term, reduced-maintenance performance, butterflystyle DEMCO valves are commonly selected for a variety of applications in the following industries:
The butterfly-style DEMCO valve provides bidirectional sealing at full-rated pressure with identical flow from either direction.
Integral flange seal
An integral flange seal molded into the edge of the seat accommodates ASME weld neck, slip-on, threaded, socket, and stub-end type C flanges.
ASME Class 150 rating
With a body rating of American Society of Mechanical Engineers (ASME) Class 150 (285-psi nonshock), the wafer body diameters are designed to self-center in the ASME Class 150 flange pattern.