Emerson VE4003S2B1 Key features
High precision and stability: with brushless DC motor and high precision gear transmission components, multi-speed control, operates smooth and adapts to fine adjustment under complex working conditions.
Smart communication and integration: HART, Modbus protocol integrated directly, can communicate with DCS/PLC system, support remote monitoring, parameter configuration, fault diagnosis, reduce operation & maintenance costs.
Safety and reliability: Set standard motor brake, overload protection and stall automatic shutdown function to prevent mechanical damage.
Flexible setting: spring reset or multi-turn mode supported, applicable to various valve types.


Alternative models
Comparison Item | VE4003S2B1 | VE4002S2B1 | VE4004S2B1 |
Rated Torque | 400 Nm | 250 Nm | 600 Nm |
Suitable Valve Size | Medium bore valves (DN50~DN200) | Small bore valves (DN25~DN100) | Large bore valves (DN150~DN300) |
Communication Protocols | HART/Modbus | 4-20mA (optional HART) | HART/Modbus |
Protection Rating | IP68 | IP67 | IP68 |
Price (Reference) | Mid-range | Economy | High-end |
Substitute Conclusion | Not replaceable for VE4004S2B1 (insufficient torque); partially replaces VE4002S2B1 (torque redundancy); superior to Honeywell SKD 34 (better communication and protection). | Only suitable for small bore valves; cannot replace VE4003S2B1. | Required for higher torque but with larger size and cost. |
Summary: The VE4003S2B1 balances torque, communication protocols, and environmental adaptability, making it ideal for medium-bore valve control. For lower torque or cost-sensitive applications, the VE4002S2B1 is an option (with reduced functionality). Higher torque requirements may necessitate the VE4004S2B1 (larger size and cost).