SA-1 & SA-1-EP
SA-1 positioner can be fitted on actuators with simple or double effect and operational stroke included between 3÷100 mm for reverse action and the spring extended. Besides, it has operational stroke included between 2÷65 mm for direct and reverse action and the spring compressed for cylinder with max diameter 200 mm.
Their operating principle belongs to the force balance type with linear characteristics.
SA-1 positioner is very compact and it can be fully installed on the servo-control syste. The feed-back element consists in a spring having a linear characteristic, actuated by the piston movement: no external elements for movement intake are therefore required.
- Air consumption: about 1.3 Nm^3/h with positioner in balance and air supply at 6 bar
- Air supply pressure: dry and clean instrument air at 3÷7 bar (300÷700 kPa)
- 1/4" NPT for air supply
- 1/4" NPT for regulating signal
- Inlet signal pressure: 3÷15 psi (0.2÷1 bar) - (20÷100 kPa)
- Linearity: 1% referring to the stroke
- External parts: anticorodal
- Internal parts: bronze and stainless steel
- Operating temperature: -20°C to +60°C
- Stability: it is not sensitive to pressure change of air supply