SMC Type Valve Positioner

IP8100 Electro Pneumatic Valve Positioner

SMC-pattern IP8100, rotary type with position output

The IP8100 is the rotary-cam version. Its 4–20 mA DC output current gives remote position detection, and an external scale plate plus a larger pressure gauge make valve position readable at the valve.

Rotary cam feedback, 60 to 100° standard stroke
4–20 mA DC output current for remote position detection
External scale plate for direct reading of valve position
Enlarged pressure gauge diameter
Interchangeable with the IP6#00 series

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Typical duty: Quarter-turn valves that must report position back to the control room without a separate transmitter box.

Specification

IP8000 / IP8100 specification (data sheet published on the source site)
Input current	4–20 mA DC (standard)
Input resistance	235 ± 15 Ω
Supply air pressure	0.14–0.7 MPa (electro-pneumatic builds)
Standard stroke	IP8000 lever 10–85 mm (deflection 10–30°); IP8100 rotary 60–100°
Sensitivity	Within 0.1 % F.S. (IP8000 single action)
Linearity	Within ±1 % F.S. (single action)
Hysteresis	Within 0.75 % F.S. (single action)
Repeatability	Within ±0.5 % F.S.
Output flow	80 l/min (ANR) or more at 0.14 MPa supply
Air consumption	5 l/min (ANR) or less at 0.14 MPa supply
Ambient and fluid temperature	General structure -20 to +80 °C
Enclosure	JIS F8007, IP65 (conforms to IEC Pub. 60529)
Air connection port	Rc 1/4, NPT 1/4 or G 1/4 female thread
Electrical connection port	G 1/2, M20×1.5 or NPT 1/2 female thread
Material / coating	Aluminium diecast body, baking finish with denatured epoxy resin
Weight	2.4 kg without terminal box / 2.6 kg with terminal box

Technical background

IP8100 , Electro-Pneumatic Positioner, Rotary type. Output current (4-20mADC) realizes remote position detection. External scale plate is installed for easy reading of valve position. The pressure gauge diameter is increased to large size for easy reading. Interchangeable with IP6#00 series . IP8000/IP8100 Electro Pneumatic Valve Positioner- The IP8100 valve positioner is the main accessory of the control valve.

Valve positioner takes the stem displacement signal as the input feedback measurement signal, and uses the controller output signal as the setting signal for comparison. When there is a deviation between the two, it changes its output to the actuator. The signal causes the actuator to act, establishing a one-to-one correspondence between the valve stem displacement times and the controller output signal.

Therefore, the valve positioner constitutes a feedback control system that uses the displacement of the valve stem as the measurement signal and the output of the controller as the setting signal. The manipulated variable of the control system is the output signal from the valve positioner to the actuator.

Questions buyers ask

How is position reported?

As a 4–20 mA DC output current from the positioner itself.

What stroke does the rotary version cover?

60 to 100°, with stroke adjustment from 0 to 60° or 0 to 100° depending on build.

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