『Flowtech Flow Meter Catalog: Affordable Inline Rotameters and Visual Fluid Flow Indicators』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)
Flowtech Flow Meter Catalog: Affordable Inline Rotameters and Visual Fluid Flow Indicators
Quick Answer: Silver Automation Instruments supplies Flowtech inline rotameters from DN15 to DN80 and visual flow indicators for liquid and gas lines. Most items operate up to 10 bar and 100 °C with BSP, NPT, or flanged connections. Send your pipe size, flow range, fluid type, and connection standard for same-day pricing.
Flowtech Rotameters in the Catalog
The Flowtech catalog focuses on field replacement rotameters and small OEM builds. Silver Instruments keeps these units simple. A buyer does not need a smart transmitter for every line. Many installations only need a direct reading tube with a float.
Most Flowtech rotameters use a transparent acrylic or polycarbonate tube. Fittings can be brass, PVC, 304 stainless steel, or 316 stainless steel. Standard sizes cover DN15, DN20, DN25, DN32, DN40, DN50, DN65, and DN80. Threaded models fit BSP or NPT threads. Flanged models fit PN10 or ANSI 150 patterns for larger lines.
Liquid ranges start at 10 to 100 liters per hour on a DN15 short tube. Mid ranges cover 40 to 400 LPH, 100 to 1000 LPH, and 200 to 2500 LPH. Larger DN50 and DN80 bodies handle 500 to 5000 LPH or 1 to 10 cubic meters per hour depending on float material and tube length. Gas ranges start around 0.2 to 2 normal cubic meters per hour for air and go up to 10 to 100 Nm3/h.
Accuracy is not laboratory grade. Most models deliver plus or minus 4 percent of full scale on a 150 mm scale. Some larger tubes reach plus or minus 2.5 percent. Repeatability is around plus or minus 0.5 percent. That is enough for dosing skids, cooling loops, and pump discharge checks. Temperature limits depend on body material. Acrylic bodies stay below 60 °C. Polycarbonate bodies work up to 100 °C. Stainless steel models with glass tubes can take 120 °C in some cases.
Visual Fluid Flow Indicators
Visual indicators solve one problem. You need to see flow direction and presence without reading a scale. The Flowtech range includes flapper, rotor, drip, and plain sight glass types. Body materials include PVC, cast iron, 304 stainless steel, and 316 stainless steel. Glass or polycarbonate windows are selected based on pressure and chemical compatibility.
Common sizes run from DN15 to DN100. Most engineers use these on pump suction or discharge lines, filter bypass loops, cooling water returns, and chemical dosing lines. A flapper type gives instant visual confirmation of flow direction. A rotor type works better for low flow. A drip type suits intermittent flow such as condensate return or lubricator feed.
Pressure ratings are normally 6 to 10 bar for PVC and polycarbonate models. Stainless steel bodies with glass windows handle 16 bar in several DN25 to DN50 sizes. Temperature limits follow the window and gasket material. For steam tracing or hot CIP return, specify a stainless steel body and PTFE gasket. We have seen this on customer sites many times. A food plant in the Middle East ordered 40 stainless steel sight glasses for hot cleaning lines after checking the window material twice.
Applications Where These Flow Meters Fit
Water and wastewater plants buy the DN15 and DN25 acrylic rotameters for PAC dosing, polymer dosing, and lime slurry lines. A customer in Vietnam ordered 60 units last year for a beach resort wastewater package. They used DN15 PVC fittings because the site runs on 60 mbar air pressure and low flow chemical pumps.
Chemical dosing skids in Southeast Asia often need a simple rotameter with PVC or PP fittings. The measured fluid may be sodium hydroxide, sodium hypochlorite, or citric acid. The float and tube must match the chemical. For sodium hypochlorite, specify a PVC or PTFE lined model. Do not use brass fittings. We have seen site failures when a buyer chose brass for sodium hypochlorite service.
Food and beverage plants use visual flow indicators for CIP return lines and product transfer. Stainless steel bodies and glass windows are common. A dairy pr
_600x400.jpg)
Oil and gas service points use small rotameters on diesel day tanks and fuel additive lines. A diesel generator packager in Nigeria asked for DN20 rotameters with nylon floats for diesel flow confirmation. These units were placed after the fuel pump and before the return line. They only needed local indication, so no transmitter was used.
Selection Data You Need
Here is the thing. Rotameter sizing looks simple but a wrong float material can stop a whole line. Before you request a quote, collect these details. Fluid name and concentration. Flow range in LPH, m3/h, or Nm3/h. Pressure in bar. Temperature in °C. Pipe size DN. Connection standard such as BSP, NPT, PN10, or ANSI 150. Body material preference based on chemical compatibility. Float material if known.
Most engineers skip this part. They send a photo of an old rotameter and ask for a price. That works for replacement if the photo shows the model code. But for new skid builds, we need the process data listed above. Without pressure and temperature, we cannot confirm the tube window or O-ring. Without flow range, we cannot size the float or tube length.
For visual flow indicators, tell us if you need flapper, rotor, drip, or plain sight. Also tell us if the flow is continuous or intermittent. A drip indicator is wrong for full pipe flow. A flapper indicator is wrong for low velocity gas. These choices affect service life.
Pricing Guide for Budget Planning
Flowtech rotameters are affordable by design. For budget planning, typical export prices are as follows. A DN15 acrylic rotameter with brass fittings and a standard liquid scale costs USD 14 to 22. A DN25 PVC body rotameter with PVC fittings costs USD 18 to 30. A DN50 flanged rotameter costs USD 70 to 120 depending on float material and flange standard.
Visual flow indicators start around USD 25 for a DN25 PVC drip type. Stainless steel flapper type indicators cost USD 45 to 90 for DN25 to DN50. Larger sizes and PTFE lined models can exceed USD 150. These prices are FOB China and do not include freight, duties, or local taxes. Silver Instruments confirms final prices after receiving fluid data and connection details.
FAQ
1. Can Flowtech rotameters handle opaque liquids? No. A direct reading rotameter needs a clear fluid or a clear tube with visible float. For opaque fluids, use a magnetic rotameter or an oval gear flow meter. Tell us the fluid type and we will recommend the right option.
2. Are visual flow indicators suitable for hazardous areas? Some stainless steel models can be used in Zone 2 if selected with appropriate materials. However, the basic flapper and rotor types do not have ATEX certification. If you need Zone 1 or Zone 2, send the gas group and temperature class.
3. What is the delivery time for Flowtech rotameters? Standard DN15 to DN50 models are normally in stock in Shanghai. Delivery to Southeast Asia, Middle East, and Oceania takes 3 to 7 working days by air freight. Large DN80 or DN100 models may need 7 to 10 days for machining and calibration.
4. Can Silver Instruments put a private label on these flow meters? Yes. We support private label for OEM distributors. The minimum order depends on size and model. Tell us your required size and label file. We will quote the set up cost and unit price.
5. Do Flowtech rotameters come with calibration certificates? Basic models do not include an ISO 17025 certificate. We provide a factory inspection report with every batch. If your site audit requires third party calibration, we can arrange it for an extra fee.
Send your pressure in bar, temperature in °C, pipe size DN, and flow range to Silver Instruments. Tel: +86-25-68650347. Whatsapp: +86-25-52155837. WeChat: +86 15365082610. Website: flow-meter.com.au
Hot Product
Related AD
