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Flowserve Logix 520MD Digital HART Electro Pneumatic Smart Valve Controller Control Valve Positioner with Asco Solenoid Valve

1 set
MOQ
US $2255.00 - 2455.00/ Set
Price
Flowserve Logix 520MD Digital HART Electro Pneumatic Smart Valve Controller Control Valve Positioner with Asco Solenoid Valve
Features Gallery Product Description Ratings & Review Request A Quote
Features
Specifications
Input Signal: 4-20 MA (two-wire)
Communication: HART
Power: Loop-powered From 4-20 MA Signal
Minimum Operating Current: Approximately 3.6–3.8 MA
Actuator Compatibility: Single-acting (linear And Rotary)
Air Supply Pressure: Typically 1.5 To 6.0 Bar (22 To 87 Psi) For Original Series
Basic Infomation
Brand Name: Flowserve
Model Number: 520MD+
Payment & Shipping Terms
Packaging Details: Cardboard box/Wooden crate
Delivery Time: 6-8 weeks
Payment Terms: T/T
Supply Ability: 2000 sets per year
Product Description
Flowserve Logix 520MD Digital Valve Positioner

The Flowserve Logix 520MD is a two-wire digital valve positioner with HART communication, designed for precise control of single-acting pneumatic actuators on linear and rotary valves. It is powered by the 4-20 mA input signal and uses electronic control combined with a pneumatic output stage to position the valve accurately according to the command signal.

Product Overview

This positioner features simple local configuration and calibration options, including DIP switches and calibration buttons on related MD series units. It supports HART protocol for remote setup and monitoring. The design emphasizes reliable performance in industrial environments, with options for local status indicators and, in later versions, enhanced diagnostic capabilities. The Logix 520MD series has been widely applied for valve positioning where digital communication and consistent response are required. Note that the original Logix 520MD is primarily supported as an aftermarket product, with the updated 520MD+ representing the current generation offering improved features.

Technical Specifications
Specification Details
Type Digital HART Positioner
Input Signal 4-20 mA (two-wire)
Communication HART
Power Loop-powered from 4-20 mA signal
Minimum Operating Current Approximately 3.6–3.8 mA
Actuator Compatibility Single-acting (linear and rotary)
Air Supply Pressure Typically 1.5 to 6.0 bar (22 to 87 psi) for original series
Output Pressure 0 to 100% of supply pressure
Housing / Protection Industrial design suitable for process environments
Hazardous Area Options Intrinsically Safe and Non-Incendive ratings available (series dependent)
Application Industry

Used in process industries such as oil and gas, chemical processing, power generation, refining, and general industrial plants for accurate positioning of pneumatic control valves.

Common Problems

Users of conventional positioners may experience limited remote diagnostics, more involved calibration, or reduced insight into valve health. The Logix 520MD series addresses these through HART communication, local interface options, and diagnostic features that help monitor performance.

Replacement Models

The original Logix 520MD can be replaced or upgraded with the current Logix 520MD+ digital positioner, which offers enhanced diagnostics, piezo technology, and broader communication support while maintaining similar mounting and application compatibility.

Why Buy From Us

We supply genuine Flowserve Logix positioners and related aftermarket support, with practical assistance for matching the correct configuration to your valve and process requirements.

Stock & Delivery Time

Typical production and delivery time is 6-8 weeks (subject to availability for aftermarket or current-generation units).

RFQ Form

Please provide details on actuator type, mounting preference, required communication or diagnostic level, hazardous area needs, and quantity for a tailored quotation.

Ratings & Review

Overall Rating

5.0
Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings
5 stars
100%
4 stars
0%
3 stars
0%
2 stars
0%
1 stars
0%

All Reviews

D
Daulet Nurgazin
Kazakhstan Mar 19.2026
I purchased the Flowserve 3821 and am very satisfied with the overall transaction. The item arrived in good condition, matched the specifications accurately, and performed as expected. The seller demonstrated strong professionalism, provided a reasonable price, and ensured the delivery schedule was met. A dependable supplier that I would confidently work with again.
F
Firoz Kannur
United Arab Emirates May 1.2025
We sourced Masoneilan SVI3 valve positioners for a refinery project in UAE. The delivery was fast and the technical support was very professional. Everything worked perfectly during commissioning
A
Anggoro Fikri
Indonesia Jan 31.2025
good quality
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Get in touch with us
Contact Person : Mr. Edward Zhao
Tel : +8615000725058
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