Mechanical Water Flow Meters

Overview

Mechanical Water Flow Meters (Horizontal Woltmann type) measure the volumetric flow rate of cold water in pipelines. Featuring a removable metering insert and a sealed counter mechanism, these meters provide robust performance and accurate readings in commercial, industrial, and municipal water supply networks. The integrated magnetic transmission ensures reliable data transfer between the rotating turbine and the protected dial.

Typical Use Case: Water distribution systems (municipal or commercial) where meter durability, easy maintenance, and direct readout are essential.

GET A QUOTE

Key Uses & Applications

Cold Water Application: Operating temperature range of 0.1°C to 50°C, optimized for drinking water or general-use cold water lines
Magnetic Transmission: Inductive coupling from turbine to register ensures the counter mechanism is fully sealed, preventing water ingress
Direct Reading: 6 numeric rolls on the dial for straightforward flow and volume indication, with Dry Dial design enhancing legibility
REED Pulse Emitter: Factory-equipped Reed switch for remote flow data logging and BMS integration, enabling real-time monitoring
Removable Insert: Complete metering mechanism can be removed without disturbing the pipeline, simplifying maintenance and calibration
Protective Lid: Shields the display from dust, debris, and mechanical damage in demanding environments

Advantages & Benefits

Robust Performance: Woltmann design ensures consistent accuracy over a wide flow range with minimal pressure drop
User-Friendly Readout: 6-digit counter gives immediate flow volume data at a glance
Extended Service Life: Dry dial design and sealed mechanics protect internal components from sediment or corrosion
Low Maintenance: Easy access via removable metering insert; standard pulse output simplifies remote monitoring tasks
Flexible Integration: Reed switch emitter suits building management systems or remote water consumption billing

Technical Specifications

Parameter	Details
Meter Type	Horizontal Woltmann (B-Meter)
Flow Measurement Range	Varies by nominal diameter (DN50–DN300)
Temperature Range	Cold water applications: 0.1°C to 50°C
Pressure Rating	PN16 (typical) or per model configuration
Measurement Mechanism	Turbine-based, with removable internal insert
Transmission	Magnetic coupling from turbine to register
Display	Dry Dial with 6 numeric rolls
Pulse Emitter	Reed Switch output for remote monitoring
Accuracy Class	Typically meets ISO 4064 or MID (Metering Directive) standards
Materials	Body: Cast iron / Ductile iron Impeller & Insert: Corrosion-resistant polymer or metal alloys
Connection	Flanged or threaded ends (varies by size & region)
Protection	Protective Lid over dial

Size (in/mm)	Flow Rate	Permanent Flow Rate (m³/h)	R-100 H Trans. Flow Rate	R-100 H Min. Flow Rate	R-160 H Trans. Flow Rate	R-160 H Min. Flow Rate	Min. Reading (m³)	Max Reading (m³)	Max. Pressure Loss	Max. Pressure
50 (2)	50	40	0.64	0.4	0.256	0.16	0.5	9,999,999	0.25	16
65 (2 1/2)	78.75	63	1.008	0.63	0.403	0.252	0.5	9,999,999	0.4	16
80 (3)	125	100	1.6	1	0.64	0.4	0.5	9,999,999	0.25	16
100 (4)	200	160	2.56	1.6	1.024	0.64	0.5	9,999,999	0.4	16
125 (5)	200	160	2.56	1.6	1.024	0.64	0.5	9,999,999	0.4	16
150 (6)	312.5	250	4	2.5	1.6	1	5	9,999,999	0.16	16
200 (8)	500	400	6.4	4	2.56	1.6	5	9,999,999	0.4	16