Hydrotechnik 31V7-70-35.030 Flow Turbine
Brand: Hydrotechnik (Germany)
Type: Insertion/online turbine flowmeter
Measurement principle: Mechanical turbine (fluid drives impeller to rotate, magnetic induction detects speed)
Core functions and parameters
1. Mechanical performance
Diameter specification: DN70 (2.5 inches)
Connection method: Flange connection (standard EN 1092-1 or ANSI B16.5, specific confirmation required)
Material:
Housing: stainless steel (1.4404/316L)
Impeller: PPS or 316L (corrosion resistant)
Bearing: ceramic/tungsten carbide (long life design)
Pressure level: PN16 (standard), optional PN25/PN40
Medium temperature: -20°C to +120°C (high temperature type can reach +150°C)
2. Measurement performance
Flow range:
Water: 5~350 m³/h (typical)
Oil: 3~250 m³/h (depending on viscosity)
Accuracy: ±0.5% reading (after calibration), ±0.2% optional (high-precision type)
Repeatability: ±0.1%
Output signal:
Pulse output: square wave frequency signal (such as 1~1000Hz, K factor adjustable)
Analog output: 4~20mA (optional transmitter module required)
Digital communication: RS485 (Modbus RTU) or HART (optional)
3. Electrical characteristics
Supply voltage: 12~24V DC (pulse type) or 24V DC/220V AC (with transmitter)
Protection level: IP65 (standard), IP68 (optional for submersible type)
Explosion-proof certification: ATEX, IECEx (optional)
Product features
High dynamic response: suitable for fast flow change monitoring (such as hydraulic system)
Low pressure loss: optimized flow channel design, pressure loss <0.2 bar (at full scale)
Bidirectional measurement: supports forward and reverse flow detection (special configuration required)
Self-diagnosis function: impeller jam or empty pipe alarm (intelligent transmitter version)
Typical applications
Industrial processes: chemical medium metering, cooling water circulation monitoring
Energy systems: fuel/lubricating oil flow measurement
Ship: ballast water, fuel consumption monitoring
OEM integration: large equipment flow feedback control