Faure Herman TZN Calibrated Nozzle 301227 – For TZN25-2 Turbine Flowmeter

Overview

The Faure Herman TZN Calibrated Nozzle 301227 (PN.44.03.610) is a precision-engineered replacement component developed for Faure Herman turbine flowmeter assemblies within the TZN series. In helical turbine metering technology, calibrated nozzles play a critical role in shaping the upstream velocity profile before it interacts with the rotor. This controlled flow conditioning ensures that volumetric measurement remains linear, stable, and repeatable across the operational range of the flowmeter.

In turbine flowmeters such as TZN25-2, TZ25, TZ40 and TZN32, the nozzle directly influences rotor response, pulse frequency output, and long-term metrological integrity. Replacing a worn or damaged nozzle with an original calibrated specification part such as 301227 helps preserve factory calibration performance and minimizes measurement drift in custody transfer, industrial process, and utility applications.

Functional Role in Turbine Metering

Turbine flowmeters operate on the principle that rotor rotational speed is proportional to volumetric flow rate. For this proportionality to remain consistent:

• The flow profile must be stable

• Turbulence must be controlled

• Velocity distribution must remain uniform

The calibrated nozzle 301227 provides:

• Flow conditioning prior to rotor interaction

• Controlled acceleration of fluid into measurement section

• Optimized swirl and turbulence reduction

• Protection of measurement linearity

Without correct nozzle geometry, turbine meters may experience reduced repeatability, altered K-factor stability, and deviation from calibration curves.

Compatibility

This specific part:

• Part Number: 301227

• Internal Reference: PN.44.03.610

• Designed for: TZN25-2 turbine flowmeter

• Compatible families: TZ25, TZ40, TZN32 (depending on configuration)

• Works with transmitters: FH712 and FH713

The FH712 and FH713 transmitters convert turbine rotor pulses into frequency or current outputs for integration into industrial control systems, PLC networks, and metering computers. Proper nozzle geometry ensures stable pulse generation and consistent signal behavior.

Construction & Engineering Characteristics

Calibrated nozzles used in turbine meters are manufactured with:

• Precision-machined internal geometry

• Tight dimensional tolerances

• Industrial-grade metallic materials

• Corrosion-resistant construction

• Optimized surface finish

These factors directly impact measurement uncertainty and repeatability in liquid flow applications such as:

• Hydrocarbon measurement

• Industrial water systems

• Process liquids

• Chemical compatible fluids

• Energy and utility metering systems

Technical Specifications

Industrial Applications

The Faure Herman TZN Calibrated Nozzle 301227 is used in:

• Custody transfer turbine flow measurement systems

• Process metering in chemical plants

• Oil & hydrocarbon transfer measurement

• Industrial water flow monitoring

• Utility and energy sector metering

• High-accuracy volumetric measurement installations

• Maintenance and refurbishment of TZN series meters

Replacing worn turbine components with properly calibrated parts ensures continued compliance with operational measurement tolerances.

FAQ

Q1: What is the function of the Faure Herman TZN Calibrated Nozzle 301227?

It conditions and stabilizes the flow profile entering the turbine rotor, preserving linearity and measurement repeatability.

Q2: Which flowmeters is this part compatible with?

Primarily TZN25-2, and potentially other TZN family meters such as TZ25, TZ40 and TZN32 depending on configuration.

Q3: Is this part critical for custody transfer applications?

Yes. In turbine flow measurement, nozzle geometry directly impacts accuracy and calibration stability.

Q4: Does it work with FH712 and FH713 transmitters?

Yes, it is designed for turbine meters integrated with these transmitter series.

Q5: When should a calibrated nozzle be replaced?

During overhaul, recalibration, mechanical wear detection, or when measurement drift is observed.

Call to Action

For pricing, availability, lead time, and technical consultation regarding the Faure Herman TZN Calibrated Nozzle 301227 (PN.44.03.610) for TZN turbine flowmeters, contact Seven Star LLC. Our team can assist with correct part verification and system compatibility.