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Woltman Water Flow Meter 4 Inch

It is a woltman water meter for industrial application in sizes DN50~DN300 for cold /hot water.
flange end type:
  • LXXG DN50~DN300

Woltman Water Flow Meter 4 Inch

Product Description


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Irrigation Horizontal vane wheel, dry-dial cold (hot) water meter


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Measuring the volume of cold (hot) water passing through the pipeline.water meter is used for irrigation,municipality etc


·Removable element structure, easy installation and maintenance
·Dry-dial, Magnetic drive
·Large flow capacity, small pressure loss
·Resist water hummer and pollution
·Vacuum sealed register ensures the dial keep free from condensation and keep the reading clear in a long term service
·Selected high quality materials for steady and reliable characteristic
·Technical data conform to international standard ISO 4064/ISO9100
·With high accuracy
·Product accessories include connectors, filters, connection accessories, pipe accessories, Flange, filter

Optional Features

·Plastic register, copper register and full glass register
·Accuracy: R=25/20/50
·Size: DN50-DN300
·Cold / Hot water
·Reed switch option
·Flange standard can be choose
·360 degree rotate can be choose
·Cast iron, Ductile iron, stainless steel,GG25,GGG50,SS304,SS316 body can be choose
·Working pressure: PN16/25
·Provide pulse output

Working Condition

·Water temperature: 0.1℃~50℃ (0.1℃~90℃ for hot water meter)
·Water pressure: ≤1.0Mpa (1.6MPa on request)

Maximum Permissible Errors

·In the lower zone from qmin inclusive up to but excluding qt is ±5%
·In the upper zone from qt inclusive up to and including qs is ±2% (±3% for hot water meter)

Maximum Permissible Errors




Type Size Length Height Connecting Flange
mm D1 Outside Diameter D2 Bolt Circle Diameter Connecting Bolts(n-M)
LXXG-50 50 200 253 165 125 4-M16
LXXG-65 65 200 268 185 145 4-M16
LXXG-80 80 225 284 200 160 8-M16
LXXG-100 100 250 295 220 180 8-M16
LXXG-125 125 250 310 250 210 8-M16
LXXG-150 150 300 339 285 240 8-M20
LXXG-200 200 350 382 340 295 8-M20(1.0Mpa)
LXXG-250 250 450 438 395 350 12-M20(1.0Mpa)
405 355 12-M24(1.6Mpa)
LXXG-300 300 500 488 445 400 12-M20(1.0Mpa)
460 410 12-M24(1.6Mpa)

NOTE: The flange dimension conforms to ISO7005-1:1988 standard. Flange standard can be customized. Order for products of special requirements is also accepted

Pulse Position

Size Pulse Position
DN50-200 100/1000L/Pulse
DN250-DN300 1000L/Pulse

Pressure Loss Curve

Pressure Loss Curve

Exploded View

Flow Technique Specification

Nominal Flow Maximum Flow Q4 Permanent Flow Q3 Q3/Q1 Q2/Q1 Transi tional Flow Q2 Minimum Flow Q1 Minimum Reading Maximum Reading
DN m³/h m³/h
50 31.25 25 20 4 5 1.25 0.002 0.0002 999,999 999,999
65 50 40 20 4 8 2 0.002 0.002 999,999 9,999,999
80 78.75 63 20 4 12.6 3.15 0.002 0.002 999,999 9,999,999
100 125 100 20 4 20 5 0.002 0.002 999,999 9,999,999
125 200 160 20 4 32 8 0.002 0.002 999,999 9,999,999
150 312.5 250 20 4 50 12.5 0.002 0.002 999,999 9,999,999
200 500 400 20 4 80 20 0.002 0.002 999,999 9,999,999
250 787.5 630 20 4 126 31.5 0.02 0.02 9,999,999 99,999,999
300 1250 1000 20 4 200 50 0.02 0.02 9,999,999 99,999,999

The Operation Description Of The Two Reed Switches System

The Operation Description

Please see the diagram of the two reed switches system below, the two reed switches woud be operated “ON” OR”OFF” respectively by the magnet fitted to the pointer or gear during its running on the register, but never “ON” at the same time ,unless the out- magnet attackes.

The two reed switches operate two “ON” and two “OFF” in one round of the pointer or the gear means one signal output, this principle prevent the loss or overcounting of the signal output due to the switches joggling or the pipe vibrating, so assures reliability of the signal output.


All meters will be guaranteed against defects in workmanship and materials for a period of one (1) year from the date of acceptance. Defective meters or parts discovered within this period shall be replaced without charge upon return to the SHMETERS.

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To better ensure the safety of your goods, professional, environmentally friendly, convenient and efficient packaging services will be provided.





You need a good solution for water metering---Catering all your needs.
As the China's professional manufacturer and distributor since 2013, we have developed a comprehensive water meter range and a complete solution for the Commercial ,agriculture, Industrial and Domestic market on Mechanical type water meter and smart water meters. Moving with the changes in technology and precision metering has been the mission of the company since its genesis and we are adding metering that can support water sustainability using. Since 2017, we start the export smart water meters to the whole world, and hope more and more countries and region people can save the water with us together with the smart technology and system. Nowadays, SHMETERS have already become one the main important exporter for water flow meters in China.
We will provide your product to your hand in timely manner and keep you informed of process with your order throughout the whole sales. From the strictly QC inspection, strictly cost control and five star quality services, we believe that you will own a more solution on water metering.