DN65 氰化物流量计

1.基本规格

Model example: HHDLDBE (electromagnetic)

Type: electromagnetic flowmeter (no mechanical moving parts, leak-proof)

Applicable media: corrosive solutions such as sodium cyanide (NaCN) and potassium cyanide

(KCN) Nominal diameter: DN65 (65mm)

2. Performance parameters

规范	index
Flow range	7-70m ³/h (expandable)
Accuracy level	±0.5%
Medium conductivity	≥5μS/cm
Working pressure	≤ 1.6MPa (customizable high-pressure type)
medium temperature	-20 ℃~+120 ℃ (High temperature type optional)

3.Structural design

Electrode material:

Tantalum (Ta) or platinum-iridium alloy (strong corrosion resistance) Lining

material: PTFE (polytetrafluoroethylene) or PFA (resistant to acid, alkali and cyanide corrosion) Sealing method:

Double-end mechanical seal (leakage prevention)

Optional nitrogen purge interface (anti-crystallization blockage)

4.Safety and protection

Explosion-proof level: Ex dⅡ BT4 (suitable for flammable and explosive environments) Protection level: IP68 (fully waterproof and dustproof)

Monitoring function:

Electrode corrosion monitoring (early warning replacement)

Empty pipe detection (to prevent dry running damage)

5.Control and output

signal output:

-4-20mA + RS485 (Modbus protocol)

Optional HART communication (remote calibration)

Display mode:LCD backlight screen (instantaneous/accumulative flow, temperature, alarm status)

6.Installation requirements

Straight pipe section:5D in front, 2D in the back (D=pipe diameter)

Grounding: Must be independently grounded (anti-electromagnetic interference)

Avoid: strong magnetic field, vibration source Installation

Selection suggestions

1.High concentration of cyanide (≥20%):

Choose tantalum electrode + PTFE lining, which has stronger corrosion resistance.

2.Easy to crystallize working conditions:

Add electric heating or insulation layer (to maintain the fluidity of the medium).

3.Maintenance points：

Check the electrode wear every month

and calibrate the zero point every quarter (to ensure measurement accuracy)

If corrosion test report or explosion-proof certification documents are required, please consult the supplier to provide qualification documents for specific models.