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Butterfly Valves

Quality design and rugged dependability

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Butterfly valves have gained popularity over the years due to their thin profile between flanges, making them lighter in weight and creating a smaller install footprint.

This compact design also usually makes the initial cost for these valves lower when compared with other valve designs.

DEMCO butterfly valve closeup in the shop.

Butterfly Valves Offerings

DEMCO NE-D
Butterfly valve
2- to 12-in, short-neck design.
DEMCO NE-I
Butterfly valve
2 to 12 in, for a range of industries.
DEMCO NF-C
Butterfly valve
14 through 36 in, available in both wafer and lug styles.
High-Performance Double Offset WKM Valve
Heavy-duty design
Maintenance-free operation you can count on.
Triple Offset Valve
Reliable, repeatable isolation performance
Incorporates true triple-offset geometry to provide bubble-tight sealing.
DEMCO NE-C
Butterfly valve
2- to 36-in, one-piece body.
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Brochure High-Performance Butterfly WKM Valves

Low-cost, lightweight, reliable butterfly valves for high-pressure applications in ASME Classes 150 and 300

Catalog WKM Valves—Triple Offset Valves

High-quality bidirectional valves for critical applications in demanding markets.

Brochure WKM Triple Offset Valve

High-quality, bidirectional valves for critical applications in demanding markets.

Catalog Resilient-Seated Butterfly DEMCO Gate Valve

Installation, operation, and maintenance manual.

Product Sheet How It Works: Butterfly Valves

A butterfly valve consists of a circular disc or plate built with a stem through the middle or attached offset.

Video WKM Triple Offset Butterfly Valve Operation

Incorporates true triple-offset geometry to provide bubble-tight sealing.

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