Series 79P/PA pneumatic actuators have an aluminum housing with cataphoresis and Rilsan coating for chemical resistance. Air-to-spring models feature pre-loaded springs that safely avoid potential hazards during maintenance. The actuator functions using a double piston rack and pinion arrangement for a smooth torque profile throughout the actuator stroke. Air-to-spring models feature pre-loaded springs that safely avoid potential hazards during maintenance. The base of the actuator has an ISO output drive and bolt circle for easy mounting to quarter turn valves. The top of the actuator has a visual position indicator and a NAMUR mounting pad to accommodate mounting accessories. The air ports are ¼” NPT and have a NAMUR bolt pattern to accommodate flush mount solenoids.
Resources
Ideal Applications Include: Chemical Processing, Bleach Plants, Aquariums, Mining, Water Treatment, Landfills, Swimming Pools, Power Plants
Specifications
Type:
Double Piston, double rack and pinion
Models:
Air-to-air
Air-to-spring (fail closed)
Air-to-spring (fail open)
Air Supply:
60psi – 120psi
Bodies:
Cataphoresis and Rilsan-coated aluminum body and end caps
Torque:
59 to 40,710 in/lbs
Air Connections:
¼” NPT
Mounting Dimensions:
ISO and NAMUR
- Cataphoreses and Rilsan-coated aluminum body and end caps
- Double piston, double rack and pinion
- ISO valve mounting pattern
- ISO female star output drive
- NAMUR accessory mounting pattern
- 80psi (recommended) to 120psi (maximum) filtered air supply
- Spring return models have cataphoresis coating, or chromium passivation for spring protection
- End position adjustable travel stops
- Polyacetal or PTFE/bronze piston guides
- Self-lubricating BUNA-N o-ring seals
- -25°F to 195°F temperature range
- 1/4″ NPT air connections
- Available in air-to-air (double acting) and air-to-spring (single acting, or spring return failsafe) models
- Position indication through visible indicator knob and flats on actuator shaft
- Output shaft constructed of cataphoresis coated steel
- Sizing for low air supply pressure (60psi)
- Direct mount NAMUR solenoids in various types and voltage ratings (solenoids piped in a closed loop design)
- NAMUR double limit switches in various types and voltage ratings
- NAMUR pneumatic positioners (3-15psi)
- NAMUR electro-pneumatic positioners (4-20mA)
- Limit switch or transmitter available for positioners
- Bus systems
- Data sheet – Series 79 Pneumatic Actuator
- Actuation Basics
- OM Manual – Series 79 Pneumatic Actuator
- Series 79 Pneumatic Actuator on Type-21 Ball Valve
- Series 79 Pneumatic Actuator on Type-23 Multiport Ball Valve
- Series 79 Pneumatic Actuator on Type-57P Butterfly Valve
- Drawing – Series 79 Pneumatic Actuator on Type-57P Butterfly Valve