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Field-proven electro-pneumatic valve positioner for sliding-stem diaphragm control valves, converting 4-20mA DC input into proportional pneumatic output.
Delivers accurate, fast-responding control with excellent vibration resistance and low steady-state air consumption for energy-efficient operation.
Supports field-reversible action, accessible zero/span calibration, and rugged housing adapted to harsh industrial environments.
Technical Specifications
Parameter
Specification
Input Signal
4 to 20 mA DC, split-range capable
Supply Pressure
0.4 to 2.0 bar (6 to 30 psig)
Linearity Accuracy
±0.6% of full span
Ambient Temperature
-40°C to +85°C (-40°F to +185°F)
Application Industry
Oil & Gas: Applied in refineries, pipeline transmission and offshore platforms for process flow regulation.
Chemical & Petrochemical: Used in distillation columns, reaction vessels and corrosive medium conveying systems.
Power Generation: Matches boiler feedwater, steam control and flue gas desulfurization systems.
Common Problems & Solutions
Valve position drift → Re-calibrate zero & span adjustments; tighten loose feedback linkage and cam assembly.
No / slow pneumatic output → Clean blocked nozzle-flapper mechanism; filter contaminated air supply; verify input signal stability.
Excessive air consumption → Replace worn EPDM diaphragms and O-rings; seal leaking pneumatic pipe connections.
Replacement Models
F-isher DVC6200: HART digital positioner with advanced diagnostics, direct intelligent upgrade for 3582i.
F-isher 3582: Pure pneumatic valve positioner, matching counterpart for pneumatic-only control loops.
F-isher DVC2000: Compact digital positioner, cost-effective upgrade entry for basic digital control demands.
Why Buy From Us
100% original E-merson F-isher products, with full factory warranty and authentic quality guarantee.
Professional technical support covering calibration guidance, installation matching and after-sales troubleshooting.
Sufficient standard stock, flexible MOQ and competitive ex-works pricing for bulk orders.
Stock & Delivery Time
Standard 3582i units are in ready stock, dispatch within 24 hours after payment confirmation.
Custom-configured units (special seals, extra certifications) require 7–12 working days lead time.
Global express via DHL/FedEx/UPS, 6–8 working days delivery to most countries and regions.
RFQ Form
Required model, quantity, and special configuration requirements (seal material, certification type).
Destination address, preferred shipping method and target delivery timeline.
Additional demands for accessories, calibration service or technical documentation.
