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ZF-LZ Metal Tube Rotameter
The ZF-LZ metal tube rotameter is a variable area flow instrument based on float position measurement. Featuring a full-metal structure, it offers high durability, minimal pressure loss, and a wide measuring range (10:1). Its compact size and easy installation make it ideal for harsh environments, low flow rates, and critical media applications.
Flow Meters

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Overview:

Measurement Type: Float-based variable area flow measurement

Output Options: Local display, remote transmission, control alarm

Explosion-Proof Versions: Standard, intrinsically safe, and explosion-proof models

Applications: Industrial process control for small flow and low-velocity fluids in complex environments


Key Technical Specifications:

Measuring Range:

   o Water (20°C): 6–15,000 L/h

   o Air (0.1013MPa, 20°C): 0.05–4,000 m³/h

Turndown Ratio: 10:1 (special type up to 20:1)

Accuracy: Standard 1.6%, special type 1.0%

Operating Pressure:

   o DN15-DN50: PN4.0MPa (special type 25MPa)

   o DN80-DN100: PN1.6MPa (special type 16MPa)

   o Jacketed version: 1.6MPa

Medium Temperature:

   o Standard: -80°C to +220°C

   o High-temperature: Up to 300°C

   o PTFE-lined: ≤85°C

Environmental Temperature: -40°C to +120°C (remote type ≤65°C)

Medium Viscosity:

   o DN15: ≤5mPa.s (H15.1-H15.3), ≤30mPa.s (H15.4-H15.9)

   o DN25: ≤250mPa.s

   o DN50-DN150: ≤300mPa.s

Display:

   o Instantaneous flow: 0-50,000

   o Totalized flow: 0-99,999,999

Output Signals:

   o Standard: 4-20mA (two-wire)

   o Pulse: Minimum interval 50ms

   o Alarm: Open collector, max 100mA@30VDC, internal resistance 100Ω

Power Supply:

   o Standard: 24VDC (12-36VDC)

   o AC Version: 220VAC (86-265VAC)

   o Battery Version: 3.6V 4AH NiMH battery

Connection:

   o Standard: Flange

   o Special: Custom flange

   o Threaded: Standard or custom threads

Electrical Interface: M20×1.5, PG11, 1/2”NPT

Standard Height: 250mm (except specific installation types)

Protection Rating: IP65

Explosion-Proof Rating:

   o Intrinsically Safe: Exia Ⅱ CT5Ga

   o Flameproof: Exd Ⅱ CT5Gb

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