『Kem Flow Meter Catalog: High-Pressure Helical Gear and Turbine Transmitters for Polyurethane Resin Skids』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)
Kem Flow Meter Catalog: High-Pressure Helical Gear and Turbine Transmitters for Polyurethane Resin Skids
Quick Answer: The Kem Flow Meter Catalog covers high-pressure helical gear and turbine transmitters for polyurethane resin skids. Silver Automation Instruments supplies compatible high-pressure transmitters for isocyanate, polyol, and solvent dosing. Send us your pressure in bar, temperature in °C, pipe size in DN, and flow range in kg/h for a direct quote.
Why Polyurethane Resin Skids Need High-Pressure Flow Measurement
Polyurethane skids meter two or three reactive chemical streams at the same time. The main streams are isocyanate and polyol blend. Some systems also meter additives, catalysts, or blowing agents. Each stream has a different viscosity, density, and pressure response.
Pressure in these small lines often reaches 150 to 250 bar. Mix heads on high-pressure polyurethane machines frequently run above 200 bar. A standard flow meter with a thin housing or weak seals will leak, crack, or send unstable signals.
We have seen a customer in Vietnam run a polyol line at 210 bar with viscosity around 1800 cP. Standard turbine meters failed after two weeks because the bearing wore out. The retrofit used a helical gear transmitter with 316L body and PEEK gears. That meter has been running for over one year without replacement.
Helical Gear Transmitters vs Turbine Transmitters
Helical gear transmitters measure volume directly. They suit viscous polyol blends, filled polyols, and additives with viscosity from 20 cP to 100,000 cP. They generate a high resolution pulse output. In high-pressure polyurethane service, the pressure drop across the meter stays acceptable if the port size matches the flow range.
Turbine transmitters work better for low viscosity fluids such as pure isocyanate, solvents, and cleaning agents. They provide fast response and handle flows up to 150 L/min. But they depend on clean fluid and stable viscosity. Bearings are the weak point. Specify tungsten carbide bearings for high pressure service.
Key Specifications for Polyurethane Resin Skid Transmitters
Pressure rating: 250 bar standard, 400 bar optional.
Body material: 316L stainless steel. Wetted seals: FKM or FFKM. Gears or turbine rotor: 316L, PEEK, or tungsten carbide.
Flow range: 0.02 to 40 L/min for helical gear, 0.5 to 150 L/min for turbine depending on DN.
Output: pulse, 4-20 mA, or 4-20 mA HART. We recommend pulse output for PLC dosing control.
Temperature: -20 to 120 °C for polyurethane systems. Some high temperature versions reach 180 °C.
Viscosity range: 1 to 100,000 cP for helical gear, 0.5 to 20 cP for turbine.
Connections: BSPP, NPT, SAE flanges, or DIN flanges. Always specify sealing type.
Recommended Silver Automation Instruments Models
For polyol and filled polyol lines, specify the Si
For isocyanate and solvent lines, specify the Silver Instruments HP-TF series high-pressure turbine transmitter. Use a tungsten carbide rotor and FFKM seals. Typical size is DN10 to DN25.
Both series accept pulse output and can connect to PLC or batch controllers. You can also add a local display with total and rate.
Installation Advice for Polyurethane Skids
Place the transmitter downstream of the dosing pump but before the mix head. That position gives stable flow and reduces pressure spikes. Install a filter upstream. Hard particles destroy gear and turbine internals fast.
Do not mount the transmitter at a low point where cured resin or moisture can collect. Use a bypass loop for solvent flush. Here is the thing. Polyurethane resin cures inside the meter if you do not flush it after each production run. Many engineers skip this step and then replace internals too often.
How to Get a Quote from Silver Automation Instruments
Send us these details: fluid name, viscosity in cP, flow range in kg/h or L/min, operating pressure in bar, temperature in °C, pipe size in DN, and output signal. Our engineers will recommend a model and send a quotation within one business day.
Contact Silver Automation Instruments:
Tel: +86-25-68650347
WhatsApp: +86-25-52155837
WeChat: +86 15365082610
Website: flow-meter.com.au
FAQ: High-Pressure Helical Gear and Turbine Transmitters for Polyurethane Resin Skids
What is the maximum pressure for these transmitters?
Standard models handle 250 bar. Optional versions handle 400 bar. Confirm the pressure spikes from your dosing pump before selecting.
Which meter is better for filled polyol with abrasive filler?
Helical gear with PEEK gears is the safer choice. PEEK resists abrasive wear better than metal gears in filled polyol service. For heavy abrasives, use a larger body size to lower internal velocities.
Can a turbine transmitter measure isocyanate?
Yes. Pure isocyanate has low viscosity and suits a high-pressure turbine transmitter. Use FFKM seals and tungsten carbide bearings. Do not use standard Buna or EPDM seals.
What output signal should I specify for a polyurethane skid?
Pulse output is best for fast batching and PLC totalizing. Use 4-20 mA HART if the control system needs continuous rate and diagnostics. Both options are available.
How do I know the right size?
Silver Automation Instruments sizes the transmitter from your flow range, viscosity, and pressure drop budget. Typical sizes are DN6 to DN25 for polyurethane resin skids. Oversizing reduces accuracy at low flow. Undersizing raises pressure drop.
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