Hydrotechnik RE4-300 31VH-71-35.030 Flow Turbine
Product Description
1. Product Overview
Brand: Hydrotechnik
Model: RE4-300 31VH-71-35.030
Type: Industrial-grade high-precision turbine flowmeter (bidirectional measurement)
Core features: ultra-wide range ratio + high pressure resistant design + digital signal output
Typical applications: hydraulic system flow monitoring, energy management, process control
2. Core technical parameters
(1) Mechanical properties
Diameter specification: DN71 (2.8 inches)
Connection method: flange (EN 1092-1 PN40, optional ANSI B16.5)
Structural material:
Housing: 316L stainless steel (mirror polished flow channel)
Impeller: tungsten carbide bearing + titanium alloy blade
Seal: double PTFE packing (zero leakage)
Pressure rating: 420 bar (static) / 250 bar (working pressure)
(2) Measurement performance
Flow range:
Water: 2...600 m³/h (Reynolds number Re>4000)
Hydraulic oil: 1.5...450 m³/h (viscosity ≤46 cSt)
Accuracy: ±0.3% of reading (after calibration), ±0.15% optional
Repeatability: ±0.1%
Temperature range: -40°C to +150°C (high temperature type up to +200°C)
(3) Signal output
Dual channel output:
Channel 1: frequency pulse (1...10kHz, square wave)
Channel 2: IO-Link V1.1 (including temperature/diagnostic data)
Compatible protocols:
Pulse: compatible with PLC high-speed counter
Digital: Profinet/Modbus RTU (optional module required)
3. Intelligent functions
Self-calibration mode: automatically correct viscosity effects via IO-Link
Flow direction identification: independent accumulation of forward/reverse flow (bidirectional measurement)
Wear warning: maintenance alarm triggered when impeller speed is abnormal
Data logging: built-in storage of the last 100 sets of peak flow
4. Product advantages
✔ Ultra-long life: tungsten carbide bearing design (>100,000 hours MTBF)
✔ Low pressure loss: optimized flow channel design (ΔP<0.15 bar@Qmax)
✔ Ready to use: only 5×DN is required for the front straight pipe section (industry leading)
✔ Multi-media adaptation: oil/water/gas calibration curves can be switched through software