Where are the FKM seals in this flow meter?

There are PVC ends that attach to the acrylic body and the your piping would attach to the PVC ends. The seals are where the PVC ends meet the body of the rotameter.

What is the minimum length of lead in pipe required to maintain a flow profile at the specified worst case accuracy?

It is good practice to approach the flowmeter inlet with as few elbows and restrictions as possible. The inlet piping should be as large as the connection to the flow meter. Length of inlet piping makes little difference for normal pressure fed flowmeters. Discharge piping should also be as large as the flowmeter connection and should not have an elbow or restriction immediately after the rotameter. For water flowmeters, water is generally incompressible and moderate back pressure will not affect the accuracy of the rotameter as calibrated.

is this suitable to be used to meter liquid fertilizers?

Most likely no. These are calibrated to the specific gravity of water, (1.0) whereas the specific gravity of fertilizer would probably be around 1.5-1.8? It would depend on the makeup of the fertilizer. We are a manufacturer, so if you knew the specific gravity of the fertilizer we could custom make rotameters and calibrate it to your specific gravity.

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PRM 2-20 GPM Water Rotameter Flow Meter, 1 Inch Female NPT Connection, Acrylic Body with PVC End Tails, 316 SS Plunger & Travel Rod, Viton Seals, Max Pressure 85 PSI, Max Temp 125°F, ±4% Accuracy

PRM 2-20 GPM Water Rotameter Flow Meter, 1 Inch Female NPT Connection, Acrylic Body with PVC End Tails, 316 SS Plunger & Travel Rod, Viton Seals, Max Pressure 85 PSI, Max Temp 125°F, ±4% Accuracy

Product ID: 30825311

🌞UV-resistant acrylic body

⚖️±4% precision accuracy

🛡️316 SS corrosion-resistant plunger

RM593

Duties & taxes included

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Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Flow with confidence, measure with precision — don’t let your system run blind!

PLUG PLAY INTEGRATION - 1-inch Female NPT connection fits seamlessly into standard water systems with up to 85 PSI and 125°F tolerance.
PRECISION YOU CAN TRUST - Achieve ±4% accuracy for flawless flow monitoring in critical systems.
CHEMICAL RESISTANT SEALS - Viton O-rings protect against oils, chemicals, and weathering—perfect for harsh conditions.
ENGINEERED FOR LONGEVITY - 316 stainless steel plunger and travel rod resist corrosion and wear for long-term reliability.
BUILT TO BRAVE THE ELEMENTS - UV-resistant acrylic and PVC end tails ensure durability in outdoor and industrial environments.

The PRM 2-20 GPM Water Rotameter Flow Meter delivers precise ±4% accuracy for water flow rates between 2 and 20 GPM. Its UV-resistant acrylic body combined with durable PVC end tails and corrosion-resistant 316 stainless steel components ensures robust performance in demanding environments. Equipped with Viton seals, it withstands chemicals and weathering, while the 1-inch Female NPT connection allows easy installation in standard water systems operating up to 85 PSI and 125°F.

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