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2 Inch PVC Flow Meter: Schedule 80 Corrosive Fluid Volumetric Sensors
Quick Answer: A 2 inch PVC flow meter with a Schedule 80 body measures corrosive liquids such as hydrochloric acid, sodium hydroxide, and seawater. This volumetric sensor gives pulse output or 4-20 mA for total volume and flow rate. For most chemical dosing and transfer lines, the Silver Instruments model SI-PVC50-S80-2 handles 20 to 200 LPM at pressures up to 10 bar and temperatures up to 60 °C.
Most metal flow meters fail fast in acid, caustic, or salt solutions. PVC Schedule 80 gives better chemical resistance and a thicker wall than Schedule 40. That matters when you dose ferric chloride, sodium hypochlorite, or sulfuric acid at low concentration. Silver Instruments builds the 2 inch PVC volumetric sensor with a solid PVC body and PVDF rotor. The wetted parts avoid metal contact with the fluid. We have supplied these sensors to water treatment plants in Vietnam, a desalination project in Oman, and a chemical blender in Peru. Each site needed a local display and a pulse signal to a PLC.
Key Specifications for a 2 Inch DN50 PVC Volumetric Flow Sensor
The DN50 size is common for chemical transfer lines and skid systems. You do not need to guess the flow range. Our standard 2 inch PVC flow meter covers 20 to 200 LPM. Accuracy stays within plus or minus 1 percent of full scale. The output can be a square wave pulse, 10 pulses per liter, or an active 4-20 mA signal. Some buyers add a HART module for remote diagnostics. The electronics run on 24 VDC. The sensor body is rated to 10 bar at 25 °C. At 60 °C, derate the pressure to 6 bar. Process connections can be 2 inch NPT, BSP, socket weld, or ANSI flanges. Tell us your pipe standard when you send the quote request.
Recommended Model and Configuration from Silver Instruments
We call this unit SI-PVC50-S80-2. The body is Schedule 80 PVC. The rotor is PVDF with a ceramic shaft and PTFE bearings. This combination handles many aggressive liquids without swelling or cracking. The standard flow range is 20 to 200 LPM. Low flow starts at 10 LPM if you use the optional low flow rotor. Total volume is shown on a 6 digit LCD display. The display can be on the meter or mounted on a panel. Pulse output is open collector NPN. For chemical dosing pumps, the pulse signal helps track every liter. For PLC and SCADA systems, the 4-20 mA loop works over 1000 m with shielded cable.
Installatio
Install the sensor horizontally with a straight run of 10 pipe diameters upstream and 5 downstream. A 2 inch PVC flow meter does not like air bubbles or partially full pipes. Mount the sensor in a flooded section. Use a Y strainer upstream if your process has particles. Keep the electronics away from strong acid fumes. We have seen a customer in Malaysia install the sensor after a diaphragm pump. The pulsating flow caused unstable readings. A simple pulsation damper fixed the issue. The sensor body has no metal parts, so grounding is not needed for pulse output. For 4-20 mA output, use a 24 VDC power supply with proper polarity.
How to Order or Request a Quote
Send us your pressure in bar, temperature in °C, pipe size in DN or inch, flow range, and the type of chemical. Also tell us if you need pulse, 4-20 mA, or HART. We can ship to Singapore, Australia, Brazil, Nigeria, Saudi Arabia, and other industrial regions. Contact Silver Instruments at Tel: +86-135-1213-1526. You can reach us on Whatsapp at 86-135-12131526 or WeChat at +86 13512131526. Ask for a quote for the SI-PVC50-S80-2. If your fluid is not compatible with PVC, we also supply PVDF, PP, and 316L stainless steel flow sensors.
FAQ on 2 Inch PVC Flow Meters
Can this sensor measure sodium hypochlorite?
Yes. Sodium hypochlorite at 10 to 12 percent concentration is compatible with the PVC body and PVDF rotor. Keep the temperature below 40 °C to extend seal life.
What is the accuracy of the volumetric sensor?
The standard accuracy is plus or minus 1 percent of full scale over the range 20 to 200 LPM. For low flow under 20 LPM, a low flow rotor improves repeatability.
What output signals are available?
Standard options are pulse output, 4-20 mA, or both. HART is available on request. Pulse output gives 10 pulses per liter. The 4-20 mA loop is active and works with most PLC input cards.
Can I use this PVC flow meter for seawater desalination?
Yes. Schedule 80 PVC handles seawater and brine. For high salinity brine above 8 percent, check the temperature. At 25 °C, pressure rating is 10 bar. At 60 °C, derate to 6 bar.
Is the SI-PVC50-S80-2 suitable for food grade applications?
This model is built for industrial corrosive fluids. For food and beverage, ask us about a PVDF or 316L stainless steel body with food grade certificates.