Product Overview
The Fisher 3582 pneumatic valve positioner is a reliable, modular device that mounts directly on Fisher or other manufacturers’ diaphragm actuators. It provides accurate valve positioning by modulating actuator pressure in response to a pneumatic control signal. The series supports easy field upgrades to electro-pneumatic operation via the 582i converter and offers nuclear-qualified versions (3582NS).
Key Features
Technical Specifications
| Specification | Details |
|---|---|
| Input Signal | Pneumatic: 0.2–1.0 bar (3–15 psig) or 0.4–2.0 bar (6–30 psig) |
| Supply Pressure | Max 3.4 bar (50 psig) or actuator rating, whichever is lower |
| Air Consumption (steady-state) | 0.38–0.54 normal m³/hr at 1.4–2.4 bar supply |
| Performance | Linearity ±1%, Hysteresis 0.5% |
| Maximum Stem Travel | 105 mm (4.125 in) |
| Electrical Classification (for 3582i upgrade) | Intrinsically Safe, Explosion-proof, Type n (CSA, FM, ATEX, IECEx) |
| Weight | 2.5 kg (5.5 lb) |
| Pressure Connections | All 1/4-18 NPT |
Applications
Suitable for new installations or retrofits on sliding-stem control valves in chemical processing, refining, power plants, and nuclear facilities. Perfect for applications requiring frequent calibration or easy field maintenance.
Frequently Asked Questions
Q: How do I mount the positioner on a non-Fisher actuator?
A: Use pipe spacers cut to the “X" dimension shown in Figure 3 of the manual.
Q: What should I do before installing a 582i converter?
A: Confirm the mounting plate has a five-hole pattern and the existing input range is 0.2–1.0 bar (3–15 psig).
Q: Is sealing tape allowed on pneumatic connections?
A: No. Use thread sealant paste only to avoid obstructing small passages.
Contact Us
Phone/WeChat/WhatsApp: +8613916209596
Email: svetama@gbsxj.com
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