Electro-Pneumatic Positioner SP 520 Series
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Ver 1.20
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SHIN HWA Eng.Co.,Ltd.
2. Products Description
2-1 General Information
- SP520 Electro-Pneumatic Positioner is a control valve system device that precisely
controls the valve opening by adjusting the pressure supplied to the valve actuator
proportionally by receiving 4-20mA DC input current from the calibrator, central control
room(DCS), and control room. It is a control device.
2-2 Main Features
and Functions
(1) With Precise and fast response, it can be available in several type of control valve.
(2) Zero and Span adjustment are easy and convenient.
(3) For intrinsically safe explosion-proof products, a position transmitter and limit switch can be
built into the positioner.
(4) Explosion-proof products can be externally equipped with position transmitters and limit
switches certified for explosion protection.
(5) It has excellent IP66 enclosure grade.
(6) Air consumption quantity is very small , so in scale plant , the cost can be much saved
(7) Inside structure is Module type and simple to maintain and repair.
2-3 Options
(1) Internal position transmitter (4-20mA DC feedback signal)
(2) External limit switch
(3) External position transmitter
2-4 Label Description
Fig 2-1 : SP520 Sticker name plate
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Caution
Please care not to touch volatile solvent hardener of instant adhesive, acetone WD-40 etc.
because it can be erased sticker label's print contents.