A butterfly valve member (82) is located within the cavity and is mounted on a valve stem (76).

A butterfly valve (100) and a valve system using the butterfly valve are disclosed.

A butterfly valve having a valve body (12), a butterfly shaft (16), a butterfly plate (14), and a sleeve insert (32) is provided.

This invention also claims a butterfly valve adopting this valve core.

The butterfly gate may have a bypass opening provided in an outer edge of the butterfly gate, and an upstream side.

Throttle valve controller which controls a throttle valve of an engine by an electronically controlled actuator.

The throttle body (12A) has a throttle valve (24A) and a metallic throttle body main unit (15A) where a suction passage (16A) in which the throttle valve (24A) is provided is formed.

Thus, the eccentric butterfly valve is obtained.

The butterfly valve noise suppressor according to the present invention provides a better acoustic result compared to a muffler used in a conventional butterfly valve, and is lighter, durable, simpler and more economical to manufacture.

The butterfly shaft is coupled to the motor shaft.

Measuring and regulating valve assembly which includes a butterfly valve and a measuring flange.

The butterfly valve is opened and closed by the rotation of the valve element (4) performed by the rotation of the valve shaft (2).

A triple offset butterfly valve comprises a valve body (10) defining a valve orifice and a valve member rotatably mounted in the valve orifice.

The valve mechanism (14), preferably, comprises a butterfly valve (34).

The vane (5) of the butterfly valve is provided with a rotary butterfly valve (7) of smaller diameter, the latter valve being opened and shut independently of the larger valve.