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