Elster Helix H4000 Woltmann Bulk Water Meter

Elster Helix H4000 Woltmann Bulk Water Meter

The Elster Helix H4000 is a Woltmann-type turbine water meter designed for measuring bulk flows of cold potable water. It is suitable for commercial and industrial water measurement, revenue billing and monitoring within water-supply and distribution networks.

The H4000 combines an extended measuring range with a robust flanged meter body and protected mechanical register. It can be installed in horizontal, vertical or inclined pipelines while maintaining its specified forward-flow metrology.

Key Features

• Designed for bulk measurement of cold potable water.
• Available in nominal sizes from DN40 to DN300.
• Measures flow rates from approximately 0.35 to 2,000 m³/h across the complete size range.
• Suitable for horizontal, vertical and inclined pipelines.
• Extended low-flow and high-flow measuring performance.
• Measures forward and reverse flow according to the selected size and configuration.
• Maximum water temperature of 50 °C.
• Maximum working pressure of 16 bar.
• Robust shroud and protected copper-can register for long service life and readability.
• Compatible with the optional PR7 inductive pulse transmitter.
• In-line strainer available to protect the turbine rotor from debris.

Helix H4000 Technical Specifications

Available meter sizes, flange standards, pressure ratings, laying lengths and pulse values depend on the selected H4000 configuration. Confirm the complete model specification before ordering.

How the Woltmann Meter Works

The H4000 uses a turbine rotor positioned in the water flow. Water passing through the meter rotates the turbine at a speed related to the volumetric flow rate. The mechanical transmission converts this rotation into an accumulated volume shown on the register.

Because it is a velocity-type meter, the H4000 is particularly suitable for larger pipe sizes and bulk-water flow rates. It should not be selected using positive-displacement-meter sizing practices.

Installation Orientation

The Helix H4000 can be installed in horizontal, vertical or inclined pipelines. The pipeline must remain completely filled with water during measurement, and the flow direction must correspond with the arrow marked on the meter body.

• Install the meter where the pipe will remain full under normal operating conditions.
• Confirm that the selected meter size is approved for the required installation orientation.
• Avoid installation at the highest point of a pipeline where air may accumulate.
• Provide sufficient clearance for reading, maintenance and register replacement.
• Support the connecting pipework so external loading is not transferred to the meter body.
• Do not use the meter to correct misaligned pipe flanges.
• Flush new or modified pipework before installing the meter.

Flow Direction and Reverse-Flow Measurement

The H4000 supports forward-flow measurement throughout the range. Reverse-flow measurement is available according to meter size and configuration, with specified reverse-flow metrology available for sizes up to DN150.

If reverse flow is expected, confirm the approved flow range, register behaviour and pulse-output requirements before ordering. Reverse flow should not be assumed to have the same performance for every size.

Pipework and Strainer Requirements

Foreign material can damage the turbine rotor or affect measurement performance. An appropriate upstream strainer is recommended where the water may contain rust, scale, sand or other particles.

• Select the strainer according to pipe size, pressure and expected contamination.
• Install the meter and strainer in an accessible location.
• Allow for pressure loss across the meter and strainer at maximum flow.
• Clean the pipeline before commissioning.
• Open isolation valves gradually to prevent hydraulic shock.
• Check all flange connections for leakage before operation.

Optional Pulse Output

The Helix H4000 can be equipped with an optional PR7 inductive pulse transmitter. The pulse signal allows accumulated water consumption to be transmitted to a remote counter, building-management system, data logger, telemetry system or compatible controller.

The pulse value depends on the meter size and selected register configuration. Confirm the required pulse weight, transmitter type, cable arrangement and receiving-device input before ordering.

Typical Applications

• Commercial-building water consumption
• Industrial water-supply systems
• Factory and process-water distribution
• Water-treatment and pumping stations
• Municipal water-distribution networks
• Bulk potable-water transfer
• Revenue and submetering applications
• Cooling-water and utility-water monitoring
• District and zone water measurement
• Leakage and network-management programmes

Selecting the Correct H4000 Size

Select the meter according to the normal, minimum and maximum operating flow—not only the nominal pipe diameter. An oversized meter may provide inadequate measurement at low flow, while an undersized meter can produce excessive pressure loss and mechanical loading.

Provide the following information when requesting a quotation:

• Pipe size and flange standard
• Minimum, normal and maximum flow rate
• Maximum operating pressure
• Maximum water temperature
• Horizontal, vertical or inclined installation
• Forward-only or forward-and-reverse measurement
• Required mechanical register units
• Pulse-output and pulse-value requirements
• Available straight-pipe length
• Potable-water approval requirements

Elster H4000 Supplier and Technical Support

Seacom Process Instruments supplies and supports the Elster Helix H4000 bulk cold-water meter. Our team can assist with meter sizing, flange selection, installation orientation, reverse-flow requirements, pulse-output selection and accessories.

Contact Seacom with the pipe size, operating flow range, water temperature, working pressure, installation orientation and output requirements so we can recommend the correct H4000 configuration.