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Hunter HC 100 Flow Meter: Technical Data Sheets and Nominal Pipe Diameter Flow Boundaries
Quick Answer: The Hunter HC 100 flow meter is normally used on DN15 to DN50 water lines. The nominal pipe diameter flow boundaries usually range from about 1 L/min to 100 L/min depending on pressure, straight run, and fluid condition. Silver Automation Instruments helps engineers read the technical data sheet and source an industrial replacement with a matching process connection and output signal.
What the Hunter HC 100 Flow Meter Technical Data Sheet Covers
Most Hunter HC 100 flow meter data sheets list pipe size, flow range, accuracy, operating pressure, temperature limits, and pulse output. Engineers in Australia, Vietnam, and Mexico often check these values before installing the meter in irrigation, cooling water, or light process lines.
The flow body is usually plastic or brass. The rotor type depends on water quality. Clean water works well. Dirty water or saltwater may shorten the rotor life. For those services Silver Automation Instruments recommends an electromagnetic flow meter with no moving parts.
Nominal pipe diameter flow boundaries change with the actual pipe inside diameter. A DN15 meter does not share the same minimum flow as a DN50 meter. The data sheet normally gives a minimum and maximum range at a defined velocity.
Nominal Pipe Diameter Flow Boundaries
Here is the thing. The flow boundaries in a data sheet are not fixed values. They are based on a clean fluid and a fully filled pipe. In practice a DN15 Hunter HC 100 flow meter has a usable range near 1.5 L/min to 20 L/min on cold water. A DN20 meter often starts at 2 L/min and stops at 40 L/min. A DN25 meter normally covers 3 L/min to 60 L/min. A DN32 meter handles 5 L/min to 80 L/min. A DN40 meter works from 8 L/min to 100 L/min. A DN50 meter can measure 10 L/min to 100 L/min on short straight runs.
These boundaries shift when viscosity changes. Diesel and light oils have different velocity profiles. A 500 cP fluid cannot be metered accurately with the same DN25 flow body without derating the maximum flow. Silver Automation Instruments often supplies oval gear flow meters for diesel, heavy oil, or lubricants above 30 cP.
But the data sheet may not include viscosity correction curves. That is a common gap for buyers in Southeast Asia and the Middle East. A paint manufacturer in Thailand requested a DN25 flow meter for solvent and found the plastic rotor swelled after six weeks. We replaced it with a stainless steel oval gear flow meter.
Installation and Straight Run Requirements
The technical data sheet often states straight run requirements of 10 pipe diameters upstream and 5 pipe diameters downstream. A DN40 installation needs about 400 mm of straight pipe before the meter and 200 mm after the meter. Most engineers skip this part during a retrofit. The result is unstable readings at low flow.
Engineers should also check the direction of flow and mounting orientation. Some Hunter HC 100 flow meters allow horizontal or vertical mounting. Vertical mounting with upward flow helps keep the rotor submerged and reduces air pocket errors.
Do not install the meter near a partially closed valve or pump discharge. Turbulence from a butterfly valve 3 diameters upstream will distort the flow profile. Last year a customer in the Philippines reported a 12 percent error on a DN50 cooling water line because the meter sat too close to a globe valve.
Output Signal and Data Sheet Ratings
Hunter HC 100 flow meters usually include a pulse output. The data sheet lists pulses per liter or pulses per gallon. The pulse value must match the controller setup. A mismatch causes totalized volume errors in
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Pressure ratings are normally 10 bar for plastic bodies and up to 16 bar for brass bodies. Temperature limits are usually 5 to 60 degrees Celsius. For hot water above 80 degrees Celsius Silver Automation Instruments recommends a magnetic flow meter with PTFE liner and 4-20 mA HART output.
Because the data sheet may not include chemical compatibility, review the wetted parts list. PVC and polypropylene bodies are fine for fresh water and weak acids. They fail with aromatics, strong solvents, or steam condensate. A water treatment plant in Mexico found this after a chlorine dioxide line cracked a plastic flow meter body in two months.
Industrial Replacement Options for Hunter HC 100 Flow Meter
Silver Automation Instruments supplies industrial flow meters for DN15 to DN200 lines. For clean water and desalination plant service we offer electromagnetic flow meters with 0.5 percent accuracy and 4-20 mA HART output. For diesel and fuel oil batching we supply oval gear flow meters. For compressed air or natural gas we supply thermal mass flow meters with kg/h output. For ATEX Zone 1 gas service we can supply vortex flow meters with the required certification.
For batching systems with temperature compensation the PLC often reads a PT100 sensor next to the flow meter. For CIP chemical lines with conductivity above 5 µS/cm an electromagnetic flow meter gives a stable reading without a rotor.
When you send your pipe size, fluid type, pressure, temperature, and flow range, we can recommend a direct replacement with the same process connection or offer adapters. A distributor in South Africa ordered 30 electromagnetic flow meters for DN40 cooling water skids after comparing the maintenance cost of rotor meters.
FAQ: Hunter HC 100 Flow Meter Technical Data and Pipe Diameter Boundaries
What pipe sizes does the Hunter HC 100 flow meter support?
Typical installations cover DN15 through DN50. Some users install the meter on DN65 pipe with reducers. Silver Automation Instruments can supply larger industrial meters for DN80 to DN200 lines.
What is the minimum flow rate for a DN25 Hunter HC 100 flow meter?
On clean water a DN25 meter often starts around 3 L/min. The exact value depends on the rotor type and controller sensitivity. Do not use the same range for viscous fluids without correction.
Can the Hunter HC 100 flow meter measure seawater?
Plastic body versions may survive intermittent seawater service but metal parts may corrode. For continuous seawater use in a desalination plant choose an electromagnetic flow meter with a PTFE or rubber liner and titanium electrodes.
What output signal does the Hunter HC 100 flow meter use?
The data sheet usually shows a pulse output. The pulse factor may be set by the controller. If you need 4-20 mA HART for a PLC or SCADA system, Silver Automation Instruments can add a converter or supply a direct 4-20 mA flow meter.
How do I select a replacement with the same pipe diameter flow boundaries?
Send the pipe size, fluid type, operating pressure, temperature, minimum flow, and maximum flow to Silver Automation Instruments. We will match the flow boundaries or propose a better meter for the same process connection.
Contact Silver Automation Instruments
Need a Hunter HC 100 flow meter technical data sheet cross reference or an industrial replacement? Send us your pressure in bar, temperature in Celsius, pipe size in DN, and flow range in L/min.
Tel: +86-25-68650347
Whatsapp: +86-25-52155837
WeChat: +86 15365082610
For full product data see flow-meter.com.au.