The TTV wafer pattern bronze butterfly valve is made of high quality bronze with bubble tight shutoff, strong corrosion resistance, long service life and is widely used in various industries including petroleum, chemical industry and marine. The Festo pneumatic rack-and-pinion is ideal for use in applications where space is at a premium or where it needs to be mounted close to the drive unit due to mounting restrictions such as vibration requirements or limited depth available behind an enclosure. The quarter turn action offers quick opening or closing with ease of operation and the valve has good flow control characteristics. In the wide open position, the only obstruction to flow is that due to the thickness of the disk, so the pressure drop across the valve is small.