Flowserve Logix 520MD Plus Digital HART Valve Positioner

Product Overview

1. Adopts advanced piezoelectric technology with 4–20mA two-wire HART 5/6/7 communication for valve actuator control.
2. Built-in over 130 valve diagnostic alarms, supporting ValveSight DTM software for real equipment health monitoring.
3. Supports on-site quick auto-calibration and local jog operation without handheld communicator.

Technical Specifications

Application Industry

1. Oil & gas upstream/downstream pipelines for pneumatic regulating valve automatic control
2. Chemical & petrochemical plants for corrosive medium flow adjustment valves
3. Thermal power station boiler and steam pipeline control valve matching equipment

Common Problems & Solutions

1. Control loop oscillation: Reduce proportional gain, clean internal spool valve and filter air supply.
2. Position feedback failure: Check linkage connection, execute full stroke quick calibration.
3. HART communication loss: Verify loop voltage and wiring, restart device after power cycle.

Replacement Models

1. Flowserve Logix 521MD Plus / 522MD Plus high-end upgraded positioners
2. Flowserve Logix 3200MD series double-acting digital HART positioner
3. Masoneilan SVI2 AP universal HART valve positioner cross-brand substitute

Why Buy From Us

1. Supply brand-new original Flowserve complete sets with factory test & explosion-proof certificates.
2. Provide free calibration guidance and ValveSight DTM software operation training.
3. 12-month official warranty with global after-sales technical support service.

Stock & Delivery Time

1. Standard non-explosion Logix 520MD Plus models in stock, ship within 3–7 working days.
2. Custom intrinsically safe ATEX/FM versions take 15–20 working days for production.
3. Complete export customs documents provided for sea & air global logistics.

RFQ Form

1. Specify explosion-proof grade and single/double acting actuator matching requirement.
2. Confirm valve stroke range and working temperature environment parameters.
3. Inform target order quantity to get accurate FOB USD tiered unit price.