Product Overview
The Fisher 3582 pneumatic valve positioner is a robust, field-reversible device designed for use with diaphragm-actuated, sliding-stem control valve assemblies. It receives a pneumatic input signal (typically 0.2 to 1.0 bar or 0.4 to 2.0 bar) from a control device and modulates supply pressure to the actuator to maintain precise valve stem position proportional to the input signal. The 3582 series includes models with and without bypass, gauges, or automotive tire valves. The 3582NS variant is specially qualified for nuclear service applications.
Key Features
Technical Specifications
| Specification | Details |
|---|---|
| Input Signal | 0.2–1.0 bar (3–15 psig) or 0.4–2.0 bar (6–30 psig); split-range capable |
| Output Signal | Pneumatic pressure up to 95% of maximum supply |
| Supply Pressure | Recommended: 0.3 bar (5 psi) above actuator requirement; Max: 3.4 bar (50 psig) |
| Supply Medium | Clean, dry, oil-free air or noncorrosive gas |
| Air Consumption (max steady-state) | 0.38–0.54 normal m³/hr (14–20 scfh) at 1.4–2.4 bar supply |
| Performance | Independent linearity ±1%; Hysteresis 0.5% of span |
| Operating Temperature | Standard: –40 to +71°C (–40 to +160°F); 3582NS: up to +82°C |
| Maximum Valve Stem Travel | 105 mm (4.125 in); adjustable |
| Weight | 2.5 kg (5.5 lb) |
Applications
Ideal for process control in oil & gas, chemical, power generation, and refining industries where reliable pneumatic positioning of sliding-stem control valves is required. The 3582NS model is qualified for nuclear power plant service.
Frequently Asked Questions
Q: Can the 3582 be used for split-range operation?
A: Yes. No additional parts are required; simply calibrate using the desired split-range input signals after beam alignment.
Q: How do I change from direct to reverse action?
A: Move the flapper assembly to the opposite quadrant of the beam (DIRECT or REVERSE) and recalibrate.
Q: What cam is supplied as standard?
A: Linear Cam A is installed at the factory.
Contact Us
Phone/WeChat/WhatsApp: +8613916209596
Email: svetama@gbsxj.com
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