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Home /Products/Pneumatic Control Valves/Flowserve Logix 520MD Digital Piezo Diagnostics Control Valve Chemical Power Plant Valve Positioner

Flowserve Logix 520MD Digital Piezo Diagnostics Control Valve Chemical Power Plant Valve Positioner

1
MOQ
US $1000.00 - 1250.00/ Set
Price
Flowserve Logix 520MD Digital Piezo Diagnostics Control Valve Chemical Power Plant Valve Positioner
Features Gallery Product Description Ratings & Review Request A Quote
Features
Specifications
Input Signal: 4-20 MA
Supply Pressure: 1.4 - 7 Bar (20 - 100 Psi)
Operating Temperature: -40°C To +85°C
Enclosure Protection: IP66 / NEMA 4X
Repeatability: ≤0.5%
Communication Protocol: HART (optional)
Highlight:

Flowserve Logix 520MD valve positioner

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digital piezo diagnostics control valve

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chemical power plant pneumatic valve
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: 1000 units per year
Product Description

Product Overview

The Flowserve Logix 520MD digital positioner is built for pneumatic control valves using HART communication and piezo technology. It offers easy local configuration, low air consumption in steady state, and repeatable performance. It serves as a practical choice for plants needing reliable valve positioning without complex advanced diagnostics.

Technical Specifications

Parameter Specification
Input Signal 4–20 mA DC
Communication HART
Supply Air Pressure 1.5–6.0 bar
Air Consumption (steady state) 0.08–0.12 Nm³/h
Output Capacity Up to 7.0 Nm³/h @ 6 bar
Linearity < ±1.0% FS typical
Repeatability < 0.2% FS
Operating Temperature –40 °C to +80 °C
Enclosure IP66 / NEMA 4X
Housing Aluminum

Application Industry

  • Chemical processing plants
  • Power plant auxiliary valves
  • Oil & gas production
  • General manufacturing automation
  • Petrochemical utilities

Common Problems & Solutions

  • Problem: Air quality issues causing erratic behavior → Solution: Install proper filter-regulator and maintain dry air
  • Problem: Calibration after valve maintenance → Solution: Fast local calibration buttons
  • Problem: Steady-state air usage concerns → Solution: Low consumption piezo design helps reduce costs

Replacement Models

  • Legacy Flowserve digital positioners
  • Logix 3200MD for non-IS applications

Why Buy From Us

  • Authentic Flowserve product backed by warranty
  • Good value pricing
  • Helpful guidance for basic setup
  • Reliable spare parts availability

Stock & Delivery Time

  • Common models: 6–8 weeks
  • Configured or certified versions: 8–10 weeks

RFQ Form

Please provide:

  • Valve and actuator details (type and travel)
  • Supply air pressure available
  • Any hazardous area requirements
  • Quantity needed
  • Desired delivery timeline
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
Helpful (3)
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
Helpful (3)
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.
L
leyla kh
United Arab Emirates Sep 12.2025
Helpful (10)
We purchased 20 units of valve positioners for a refinery project in UAE. Delivery was fast and technical support was very professional.
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Get in touch with us
Contact Person : Mr. Edward Zhao
Tel : +8615000725058
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No.6 Building,No.98 Lane, No.1 Fulian Road, Baoshan District, Shanghai, China
edward.zhao@gongboshi.com
+8615000725058
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