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BALL VALVE
A valve which is closed by rotating a ball with a central hole through 90 degrees.

BSP - BRITISH STANDARD PIPE
BSP thread is a thread form common on pipe fittings. Most chemical tanks would present with a 3" BSP thread bottom outlet pipe

BUTTERFLY VALVE
A valve containing a circular plate which rotates through 90 degrees to open or close. It is the most common type of valve on bottom outlets

BIFA - BRITISH INTERNATIONAL FREIGHT ASSOCIATION
The Association of the British International Forwarders.