Burkert 2875-248871 2/2-way-proportional valve
Product Description
1. Basic Features
Type: 2/2-way proportional control valve (2 ports, 2 states, flow can be adjusted linearly)
Control mode: electronic proportional control (analog signal input)
Valve body structure: straight-through or angle seat
2. Core parameters
Project specifications
Valve body material: stainless steel (316L), brass or plastic (select according to media compatibility)
Seal material: FKM (fluororubber), EPDM (ethylene propylene diene monomer) or PTFE (polytetrafluoroethylene)
Interface size: DN8-DN25 (common G1/4", G1/2" or NPT thread, need to confirm suffix)
Pressure range: 0~10 Bar (high pressure model can reach 16 Bar)
Temperature range: -10℃~+140℃ (FKM seal); -20℃~+150℃ (PTFE seal)
Flow adjustment range: 0-100% continuously adjustable (depending on Kv value and signal input)
Control signal: analog input: 0-10V, 4-20mA or PWM signal
Response time: <500ms (typical value, related to pressure and medium)
3. Working principle
Proportional solenoid drive: Control the valve core opening through the input signal (such as 4-20mA) to achieve precise flow regulation.
Closed-loop feedback optional: Some models support position feedback (such as 0-10V output) to improve control accuracy.
4. Typical applications
Process control:
Chemical reactor feed flow regulation
Water treatment system dosing ratio control
Industrial automation:
Cooling system flow dynamic adjustment
Gas mixing device (such as O₂/N₂ ratio)
Laboratory equipment:
Precision fluid distribution system
5. Product features
High-precision control: Linearity ±2% FS (full scale), repeatability ±0.5% FS
Low hysteresis: Optimized solenoid design reduces response delay
Modular design:
Extensible fieldbus module (such as PROFIBUS DP, DeviceNet)
Optional LCD display module, real-time monitoring of valve position
Energy-saving design: Pulse width modulation (PWM) reduces power consumption when maintaining valve position