Asahi/America said it introduced the Type-21a seat support technology (SST) flow control ball valve.

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The valve is available in 1/2 in through 2 in and includes a PVC ball with center provisions to support PTFE seats from 0-100% of capable flow. The company said the ball valve produces equal percentage flow characteristics for fine throttling. It requires directional installation and comes equipped with a flow direction label.

Asahi/America Type-21a SST flow control ball valve. Source: AsahiManually operated SST ball valves include a 0-100-degrees indicator plate and an indicator line on the handle, which may also be used as a carrier adjustment tool. An ISO 5211 top flange bolt pattern and base pad for panel mounting are included on all Type-21a SST ball valves. The valve body includes either EPDM or FKM O-rings.

Socket, threaded and flanged end connections are offered, and additional options include electric or pneumatic actuation with 4-20 mA control, stem extension and 2 in square operating nut.