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Oil Flow Meter JIS Flange: Japanese Industrial Standards for Machinery Integration
Quick Answer: Silver Automation Instruments supplies oil flow meters with JIS (Japanese Industrial Standards) flanges for direct integration into machinery built for Japan, Southeast Asia, or any plant using JIS-pattern piping. You get a bolt-on fit without adapter spools, faster commissioning on hydraulic systems, fuel oil lines, and lube oil circuits. Our oval gear meters and Coriolis mass meters handle viscosities from 5 cP to over 100,000 cP, with JIS 10K and JIS 20K flange ratings up to DN50 as standard.
Many engineers outside Japan discover the JIS flange detail only after unpacking a new machine. A hydraulic power unit arrives from Osaka, the oil piping is DN25 JIS 10K, and the local flow meter with an ANSI or DIN flange simply does not bolt up. We see this on customer sites in Thailand, Vietnam, Indonesia and Mexico. A JIS flange is not a minor variation. The bolt circle diameter, number of bolts, and gasket face dimensions differ from ASME B16.5 and EN 1092-1. When you measure lube oil flow to a stamping press or heavy oil to a marine engine, a direct JIS flange connection removes one leak path and one extra set of gaskets.
Why the JIS Flange Matters for Oil Flow Measurement
A JIS flange joint on an oil flow meter means the meter body becomes part of the machinery pipework without adapters. In a diesel fuel transfer skid built to Japanese specifications, the inlet and outlet flanges are JIS 5K, 10K, or 20K, often in DN15, DN20, DN25, DN40, or DN50. A mismatch forces you to add intermediate flanges and short pipe sections. That adds weight, extra sealing faces, and a small pressure drop you do not want on a high-viscosity oil line.
We keep a stock of oval gear flow meters with JIS flanges because we supply several hydraulic oil blending plants in Malaysia and lube oil distribution panels in Chile. Last year a paint manufacturer in Southeast Asia requested six oval gear meters for solvent and oil batches, all with JIS 10K RF flanges. The meters shipped with PTFE gears and a 4-20 mA HART transmitter, and the maintenance team installed them in two hours without welding or adapter kits.
Oil Types and Meter Technologies We Combine with JIS Flanges
Engine oil, gear oil, hydraulic oil, circulating lube oil, fuel oil, marine gas oil, and even edible oil. For viscosities above 10 cP and flow rates under 200 L/min, the oval gear flow meter is our standard recommendation. It gives ±0.5% of reading accuracy, works with low flow start-up, and does not need straight pipe runs. You can get it with a JIS flange body in carbon steel or 304 stainless steel, with FKM or PTFE seals depending on oil temperature. Process temperature range is -20 °C to 180 °C, pressure up to 20 bar on JIS 10K and higher on JIS 20K.
For lighter oil and fuel applications where mass measurement is required, a Coriolis mass flow meter with JIS flanges is available. It measures kg/h directly, ignores viscosity changes, and provides density and temperature along with mass flow. This is useful in marine fuel oil blending, where you need to track mass rather than volume because density shifts with bunker fuel grade. We have supplied JIS-flanged Coriolis meters for a Singapore-based bunker test bench and a fuel oil additive injection system in Indonesia.
Signal Outputs and Control System Integration
A flow meter with a JIS flange still needs to talk to the local PLC, DCS, or batch controller. Our oval gear meters with JIS connections can be fitted with a pulse output for totalizing, a 4-20 mA signal for trending, or a HART transmitter for remote configuration. A typical setup in a Japanese-built hydraulic test stand uses a DN20 oval gear meter, JIS 10K flanges, and a 4-20 mA loop power transmitter wired to a Yokogawa recorder. In a lubricant filling line in Vietnam, we supplied meters with dual-channel pulse output to a preset batch controller, achieving 20 kg pail filling repeatability within 0.3%.
For hazardous areas, we offer ATEX Zone 1 or Zone 2 certifications on the transmitter and the meter body, so th
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Dimensional Checks Before You Order
Here is the thing. A JIS flange specification alone is not enough. You need to confirm the flange standard (JIS B2220 or JIS B2238), the pressure rating (5K, 10K, 16K, 20K), the flange face type (raised face or flat face), and the actual bolt hole pitch circle diameter. A DN25 JIS 10K flange has a PCD of 90 mm with four 15 mm bolt holes. A DN25 ASME 150 lb flange has a PCD of 88.9 mm with four 15.9 mm holes. The difference is just over 1 mm, enough to make the bolts bind. Send us your pipe class document or a photo of the mating flange with a ruler next to it, and our engineers match the drilling exactly.
Material Compatibility and Oil Service Life
Oil flow meters with JIS flanges come in cast iron, carbon steel, and 304 or 316L stainless steel. Cast iron is cost-effective for hydraulic oil and gear oil at moderate temperatures. Carbon steel is common for fuel oil circuits. Stainless steel is required for edible oil, biodiesel, and some heat transfer oils. We also specify PTFE, PEEK, or stainless steel bearings inside the oval gear meter depending on oil lubricity and temperature. A food-grade soybean oil line in Australia used a 304 SS oval gear meter with PTFE seals and JIS 10K flanges, matched to the Japanese filler machine.
Most engineers skip this part. But the bearing material decides how long the meter runs without accuracy drift. In a crude palm oil production site in Sumatra, we upgraded the meter bearings from carbon-graphite to PEEK because the operating temperature reached 160 °C under steam tracing. The meter stayed within ±0.5% for two years before the first recalibration.
FAQ
Which oil flow meters support JIS flanges directly?
Oval gear flow meters, Coriolis mass flow meters, and some turbine meters can be built with JIS flange bodies. Oval gear meters are most common because they are widely used in lube oil, hydraulic oil, and fuel oil batching. Silver Automation Instruments stocks JIS-flanged oval gear meters from DN15 to DN50 with 10K and 20K ratings.
Can I get a JIS flow meter with ATEX certification for an oil blending room?
Yes. We supply oval gear meters with JIS flanges and ATEX II 2G Ex ia IIC T6 certification for Zone 1 applications. The 4-20 mA HART transmitter and the pulse pickup can be certified as a complete loop. We also provide Ex d junction boxes for remote mounting in Zone 2 areas.
What is the lead time for a JIS oval gear meter?
Standard DN15 to DN50 oval gear meters with JIS 10K carbon steel flanges and a 4-20 mA transmitter ship in 5 to 7 working days from our factory. Custom materials like 316L SS or special seal compounds add 10 days. We airfreight to Singapore, Bangkok, Jakarta, Dubai, and Santiago weekly.
Do you provide a JIS flange dimensional drawing before production?
Absolutely. We send a dimensional outline drawing with flange face dimensions, bolt hole PCD, face-to-face length, and transmitter clearance. You approve the drawing before we machine the flanges. This prevents any flange mismatch on site.
How do I start the oil flow meter specification process?
Send us your pressure (bar), temperature (°C), oil type and viscosity (cP or cSt), pipe size (DN), required flow range (L/min or kg/h), and the exact JIS flange specification (pressure rating and face type). We will recommend a meter model with a quotation within 24 hours. Email [email protected] or call Tel: +86-135-1213-1526. You can also reach us on Whatsapp: 86-135-12131526 or WeChat: +86 13512131526.
Silver Automation Instruments supplies oil flow meters with JIS flanges to machinery builders, hydraulic system integrators, fuel oil blending plants, and marine service companies across more than 40 countries. Because we machine the flange body in-house, we control fit, traceability, and delivery without relying on adapter flanges. One less joint means one less maintenance item on your oil circuit.
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