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Flowserve Logix 520MD Digital HART Fieldbus Diagnostics Valve Controller Smart Valve Positioner Supplier

1
MOQ
US $1550.00 - 1800.00/ Set
Price
Flowserve Logix 520MD Digital HART Fieldbus Diagnostics Valve Controller Smart Valve Positioner Supplier
Features Gallery Product Description Ratings & Review Request A Quote
Features
Specifications
Operating Temp. Range: -40°C To +85°C
Communication Protocol: HART (optional)
Repeatability: ≤0.5%
Enclosure Protection: IP66 / NEMA 4X
Air Consumption: Low Consumption Design
Stroke Range: Linear: 3 - 100 Mm / Rotary: 30° - 100°
Supply Pressure: 1.4 - 7 Bar (20 - 100 Psi)
Input Signal: 4-20 MA
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Flowserve Logix 520MD valve controller

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HART Fieldbus smart positioner

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pneumatic control valve diagnostics

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 HART Valve Positioner
Product Overview

The Flowserve Logix 520MD digital positioner provides reliable control for pneumatic actuators using HART protocol and piezo technology. It is designed for easy local configuration and offers solid repeatability with low steady-state air consumption. Many users appreciate its balance of features and simplicity for everyday valve positioning in process plants.

Technical Specifications
Parameter Specification
Input Signal 4–20 mA DC
Communication HART
Supply Air Pressure 1.5–6.0 bar
Air Consumption 0.08–0.12 Nm³/h (steady state)
Output Capacity Up to 7.0 Nm³/h @ 6 bar
Linearity < ±1.0% FS
Repeatability < 0.2% FS
Operating Temperature –40 °C to +80 °C
Enclosure IP66 / NEMA 4X
Housing Aluminum
Application Industry
  • Chemical processing
  • Power plant utilities
  • Oil & gas facilities
  • General manufacturing
  • Petrochemical auxiliary systems
Common Problems & Solutions
  • Problem: High air usage in steady state → Solution: Low consumption piezo design
  • Problem: Tuning for different valve sizes → Solution: Auto-tune and local gain adjustment
  • Problem: Exposure to harsh conditions → Solution: Robust enclosure and proven reliability
Replacement Models
  • Legacy Flowserve positioners
  • Logix 3200MD when intrinsic safety is not required
Why Buy From Us
  • Authentic Flowserve product
  • Good value and warranty coverage
  • Support for installation and basic diagnostics
  • Reliable spare parts supply
Stock & Delivery Time
  • Common models: 6–8 weeks
  • Configured versions: 8–10 weeks
RFQ Form

Please provide:

  • Valve and actuator details (type and travel)
  • Available air supply pressure
  • Area classification requirements
  • Any special options needed
  • Quantity and delivery schedule
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

O
Osama Qandeel
Saudi Arabia Mar 20.2026
We urgently needed control valve accessories for a shutdown project. They provided stock availability and shipped within 3 days, which helped us avoid production losses.
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.
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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