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Valves & Actuation
Series 79 AtoA on Type 21 Fast Pack

Actuated Plastic Ball Valves

Series 79 Pneumatic Actuator on Type-21 Ball Valve

The Type-21 ball valve from Asahi-America has the ability to mount a Series 79 pneumatic actuator to allow for the valve to be controlled via an air supply. Actuators are sized to operate on 80 psi of air pressure, and can be sized to operate on different air pressures upon request. Actuators are available as either air to air (double acting) or air to spring (single acting), with air to spring units having the option to fail either open or closed. The actuators are mounted on the valve through a coupling and bracket set up with an ISO bolt pattern. Units have a visual position indicator and operate as quarter turn actuators. Automation can be performed through optional equipment such as solenoids, positioners or BUS systems.


Data Sheet

AIA FindUsIn MasterSpec Deltek Specpoint 2c full CMYK 01

Ideal Applications Include:

Chemical Processing, Bleach Plants, Aquariums, Mining, Water Treatment, Landfills, Swimming Pools, Power Plants



1/2" – 6" Type-21 Ball Valve


Air to Air
Air to Spring (fail open)
Air to Spring (fail closed)

Air supply:

80psi (standard)
60 – 120 psi (optional)


Double piston, double rack and pinion


Glass filled polyamide

Air Connections:

1/4" NPT

Mounting Dimensions:

ISO and Namur


  • Actuator body and end caps constructed of glass filled Polyamide
  • Double piston double rack and pinion
  • ISO valve mounting pattern
  • ISO female star drive output
  • NAMUR accessory mounting pattern
  • Operates on 80 psi (recommended) to 120 psi (maximum) filtered air supply
  • Spring return models have cataphoresis coating or chromium passivation for spring protection
  • Available in air to air or air to spring models
  • Position indication through visible indicator knob and flats on actuator shaft
  • Actuator shaft constructed of cataphoresis coated steel or stainless steel with double o-ring seals top and bottom
  • End position adjustable travel stops
  • Polyacetal or PTFE/bronze piston guides
  • Self-lubricating BUNA-N o-ring seals
  • -25 F – 125 F temperature range
  • ¼" NPT air connections


  • Double limit switch boxes
  • Sizing for lower air supply pressures (down to 60 psi)
  • Pneumatic (3-15psi) positioners
  • Electro-pneumatic positioners (4-20mA)
  • Limit switches and transmitters available for positioners
  • BUS systems
  • Direct mount solenoids in various enclosure type and operating voltages