Xiangjing (Shanghai) M&E Technology Co., Ltd
| Type | Control |
| Media | Gas |
| Payment Terms | T/T |
| Material | Stainless Steel,Aluminum Alloy |
| Standard or nonstandard | Standard |
| Temperature of media | Normal Temperature |
| Delivery Time | 5~8 weeks |
| Pressure | Medium Pressure,Low Pressure |
| Application | General,industrial |
| Size | Standard |
| Standard | DIN,ANSI,ASTM |
| Supply Ability | 2,800 units per year |
| Structure | Control |
| Packaging Details | carton or wooden crate, 30 × 30 × 30 cm |
| Power | electric |
| Model Number | 520MD |
| Brand Name | Flowserve Logix |
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Product Specification
| Type | Control | Media | Gas |
| Payment Terms | T/T | Material | Stainless Steel,Aluminum Alloy |
| Standard or nonstandard | Standard | Temperature of media | Normal Temperature |
| Delivery Time | 5~8 weeks | Pressure | Medium Pressure,Low Pressure |
| Application | General,industrial | Size | Standard |
| Standard | DIN,ANSI,ASTM | Supply Ability | 2,800 units per year |
| Structure | Control | Packaging Details | carton or wooden crate, 30 × 30 × 30 cm |
| Power | electric | Model Number | 520MD |
| Brand Name | Flowserve Logix | ||
| High Light | Flowserve Logix 520MD valve positioner ，pneumatic valve control positioner ，industrial valve positioner package | ||
Product Overview
The Flowserve Logix 520MD Valve Positioner Package is a complete valve control assembly supplied with the positioner body, mounting bracket, feedback assembly, pressure gauges, filter regulator, tubing, fittings, terminal block, manual, calibration certificate, and a 12-month warranty. It is factory pre-assembled and pre-tested, which shortens on-site commissioning and removes the need to source and match separate components. The package accepts a 4-20 mA DC input signal and supports HART communication for configuration, calibration, and diagnostics. It delivers accurate pneumatic output for valve stroke control and includes travel feedback for dependable position monitoring. Local adjustment, auto calibration, and diagnostic alarms help keep the valve loop stable during daily operation. The package is suitable for both new installations and retrofit projects, helping maintenance teams standardize spare parts and reduce downtime.
The enclosure is built for industrial environments and protects internal electronics from dust, water, and vibration. It operates reliably across a wide ambient temperature range and accepts common instrument air supply pressures. Control options include local calibration, remote configuration, and diagnostic reporting. The package is suitable for chemical, petrochemical, oil and gas, power, water, and general process industries. Its modular design reduces maintenance effort and supports long-term reliability with predictable spare parts planning. Every package is backed by a 12-month warranty.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Valve Positioner Package |
| Model | 520MD |
| Input Signal | 4-20 mA DC |
| Communication Protocol | HART |
| Supply Pressure | 20-100 psi |
| Output Signal | Pneumatic relay output |
| Enclosure Rating | NEMA 4X / IP66 |
| Operating Temperature | -40°C to +85°C |
| Diagnostics | HART compatible diagnostics |
| Feedback | Travel feedback assembly |
| Mounting | Standard mounting bracket |
| Certification | Industrial standard compliance |
| Warranty | 12 months |
| Application | Pneumatic valve control |
| Media | Air / Gas |
| Power | Loop powered / electric |
| Manual Operation | Local adjustment and calibration |
| Process Connection | None |
| Valve Type | Pneumatic control valve |
| Size | Standard |
Application Industry
Chemical processing
Petrochemical refining
Oil and gas production
Power generation
Water and wastewater treatment
Pharmaceutical manufacturing
Food and beverage processing
Pulp and paper
These industries require accurate valve positioning, stable HART communication, and dependable diagnostics. The package performs well in humid, dusty, and vibrating plant environments when installed and maintained correctly. It supports flow, pressure, and level control loops that use pneumatic control valves.
Common Problems
Valve does not move: check 4-20 mA signal, air supply, and actuator linkage.
HART communication failure: verify loop wiring, power, and device address.
Valve hunting: inspect tuning, air supply stability, and actuator sizing.
Air leakage: check fittings, gaskets, and relay assembly.
Incorrect feedback: inspect feedback linkage, magnet, and calibration.
Diagnostic alarm: review HART diagnostic data, supply pressure, and valve friction.
Zero drift: confirm mounting stability and recalibrate.
Moisture in air line: service filter regulator and install dryer if needed.
Manual override issue: check bypass, linkage, and actuator spring.
Output pressure error: inspect I/P converter, nozzle, and relay.
All units are backed by a 12-month warranty.
Replacement Models
Flowserve Logix 3200MD
Flowserve Logix 510MD
Fisher DVC6200
Fisher DVC2000
Masoneilan SVI1000
Masoneilan SVI II
Neles ND9000
Samson 3730-3
Selection note: confirm mounting standard, travel range, input signal, supply pressure, communication protocol, and actuator compatibility.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Importer,Exporter,Trading Company,Seller,Other
Year Established:
2015
Total Annual:
30,000,000-50,000,000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
Xiangjing (Shanghai) - Leading Distributor of Pneumatic and Electric Control Valves Established in Shanghai, China, Xiangjing(Shanghai) Mechanical and Electrical Tech Co.,Ltd has been a trusted distributor of high-quality pneumatic and electric control valves for many years. With extensive industr... Xiangjing (Shanghai) - Leading Distributor of Pneumatic and Electric Control Valves Established in Shanghai, China, Xiangjing(Shanghai) Mechanical and Electrical Tech Co.,Ltd has been a trusted distributor of high-quality pneumatic and electric control valves for many years. With extensive industr...
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