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Bopp & Reuther Flow Meter: Sourcing Oval Gear Positive Displacement Systems
Quick Answer: Silver Automation Instruments supplies oval gear positive displacement flow meters that replace many Bopp and Reuther positive displacement meters in fuel oil, diesel, chemical batching, and viscous fluid service. Confirm pipe size, flow range, viscosity, connection type, and output signal before you quote. A standard replacement with pulse or 4-20 mA output often ships in 10 to 15 days.
This guide covers sourcing oval gear positive displacement systems for plants that still run legacy Bopp and Reuther flow meters. It is written for plant engineers and procurement teams who need a workable replacement without a long shutdown or an expensive OEM repair.
Silver Automation Instruments is an independent supplier based in China. We supply oval gear flow meters to Southeast Asia, Australia, Latin America, Africa, and the Middle East. We work with end users and distributors from 10 to 100 person companies in oil and gas, water, chemical, food and beverage, and marine industries. We are not the OEM for Bopp and Reuther and we do not use that trademark to imply affiliation.
Where Bopp and Reuther Oval Gear Meters Are Still Used
Most legacy Bopp and Reuther oval gear meters show up in liquid batching, fuel transfer, and internal accounting. Typical fluids include diesel, light fuel oil, heavy fuel oil, lubricating oil, palm oil, glue, resin, ink, solvents, and low conductivity chemicals. Pipe sizes range from DN10 to DN100 in most plants.
Here is the thing. Many of these meters were installed 10 to 25 years ago. The process has not changed. The pipe size, flow range, and viscosity are still the same. What changed is spare part support. That opens a practical door for a direct replacement with modern output options.
Confirm These Parameters Before You Request a Quote
Do not guess the flow range. Read the nameplate or the old datasheet. We need these values.
Pipe size in DN. Process connection type such as BSPP, NPT, DIN flanges, or ANSI flanges. Flow range in L/h or m3/h. Fluid name and viscosity in cP or cSt at working temperature. Operating pressure in bar and temperature in °C. Required output signal such as pulse, 4-20 mA, or 4-20 mA HART. Hazardous area classification if applicable, for example ATEX Zone 1 or Zone 2.
Most engineers skip the viscosity check. That is a mistake. Oval gear meters are positive displacement devices. Accuracy depends on clearance and viscosity. A meter sized for diesel at 5 cP behaves differently on resin at 800 cP.
Silver Instruments Replacement Options
We manufacture oval gear positive displacement flow meters in aluminum, cast iron, stainless steel 304, and stainless steel 316. Gear materials include PPS, aluminum, cast iron, and stainless steel. Common accuracy is 0.5 percent of reading for medium viscosity and 0.2 percent after linearization. We can match many Bopp and Reuther mechanical registers with a local LCD totalizer plus pulse and 4-20 mA outputs.
For simple diesel transfer, an aluminum body with PPS gears works well. For chemical dosing or food related service, stainless steel 316 wit
We have seen this on customer sites many times. A paint manufacturer in Vietnam replaced a legacy Bopp and Reuther meter on a 1000 cP resin line. We supplied a stainless steel oval gear meter with 4-20 mA HART and a local display. The meter fit the existing DIN flange and the batch controller read the same pulse factor. Start-up took one shift.
Output and Connection Details
The old meter may have a mechanical counter only. The new meter can provide pulse output, 4-20 mA, or 4-20 mA HART. Some batch controllers need a specific pulse factor in pulses per liter. We can preconfigure that at the factory so the replacement does not require PLC changes.
Process connections are not always direct. For DIN flange to ANSI flange conversions we can include adapters or supply a new meter with the correct flange drilling. Tell us the bolt circle, pressure rating, and face type. Do not assume DN50 is the same. DIN PN16 and ANSI 150 lb are not identical.
Price, Lead Time, and Support
Typical replacement oval gear meters for DN15 to DN50 liquid lines cost less than the OEM repair kit plus service labor. Lead time is normally 10 to 15 days for standard aluminum or stainless steel models. Custom flange drilling or high temperature options may add 5 to 10 days.
Send us your pressure in bar, temperature in °C, pipe size in DN, and flow range. Include a photo of the old nameplate if you have one. That helps us confirm the pulse factor and connection type before we quote.
Contact Silver Automation Instruments
Tel: +86-135-1213-1526
Whatsapp: 86-135-12131526
WeChat: +86 13512131526
Web: flow-meter.com.au
FAQ
Can Silver Automation Instruments replace any Bopp and Reuther flow meter?
We can replace most oval gear positive displacement meters in liquid service. We need the nameplate data to confirm the flow range, viscosity, connection, and output. Some special high pressure or high temperature versions may require a custom review.
What accuracy can I expect after replacement?
Most standard oval gear meters from Silver Automation Instruments hold 0.5 percent of reading. After field calibration or linearization on the batch controller, 0.2 percent is realistic for many oils and chemicals.
Do you supply ATEX approved models?
Yes, we can supply oval gear flow meters with Ex d or Ex ia protection for Zone 1 or Zone 2 gas atmospheres. Tell us the gas group and temperature class from your area classification drawing.
What if my old meter has a mechanical register only?
We supply a new meter with a local LCD totalizer and pulse or 4-20 mA output. The mechanical register is often not needed, but we can retain a local display for operator reading.
What information do you need for a firm quotation?
Send pipe size in DN, flow range in L/h or m3/h, fluid viscosity in cP, operating pressure in bar, temperature in °C, connection standard, and output signal. A nameplate photo is the fastest way to get a complete proposal.
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