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Gerand Flow Meter Data Sheet Archive: Flange-to-Flange Dimensions and Differential Pressure Curves
Quick Answer: The Gerand flow meter data sheet archive gives you flange-to-flange dimensions and differential pressure curves for DN15 to DN300 meter bodies. Use this data before you cut pipe or order a replacement. Send your pipe size in DN, flow range, pressure in bar, and temperature in °C to Silver Automation Instruments for a matching model or a direct replacement quote.
Why Flange-to-Flange Dimensions Matter Before You Buy
Maintenance teams often replace a flow meter without changing the existing pipe spool. The new meter body must fit between the upstream and downstream flanges. Gerand data sheets list this distance as a flange-to-flange dimension. A DN50 meter may have a face-to-face length of 200 mm or 250 mm depending on the model. If you guess wrong, the crew has to cut pipe, weld new flanges, and drain the line again. In practice, most engineers check this dimension first.
We have seen this on customer sites in Vietnam, Thailand, and the Philippines. A water treatment plant ordered a replacement meter with the right flow range but the wrong body length. The shutdown cost more than the meter. That is why Silver Instruments asks for the existing flange-to-flange dimension before quoting.
How Differential Pressure Curves Help You Avoid a Bad Selection
Every flow meter creates some pressure loss. The differential pressure curve shows pressure drop against flow rate for a given meter size and fluid condition. For a Gerand flow meter, the curve is normally based on water at 20 °C or air at standard conditions. You read the curve at your maximum flow rate. If the pressure drop is too high for your pump, you go one size up or pick a different meter type.
Here is the thing. A pump in a food plant may only have 0.3 bar head available for the meter. The Gerand curve may show 0.45 bar at full flow. That small difference causes a production bottleneck. The Silver Instruments engineering team can check the curve against your liquid viscosity in cP, density, and gas or liquid phase before you order.
What You Will Find in the Gerand Data Sheet Archive
The archive covers standard Gerand flow meter drawings, pressure drop graphs, accuracy statements, and material lists. Flange ratings include ANSI 150, ANSI 300, DIN PN16, DIN PN40, JIS 10K, and JIS 20K. Meter sizes range from DN15 to DN300. Some files also include PT100 temperature sensor options, 4-20 mA HART output, and ATEX Zone 1 approvals for gas metering.
Because the archive is used by engineers across oil and gas, water and wastewater, chemical, food and beverage, and marine sectors, the files are sorted by model and line size. Silver Automation Instruments keeps both older Gerand sheets and current versions. If you need a specific revision, send the serial number or tag number from the old nameplate.
Worked Example: Replacing a DN80 Meter in a Cooling Water Line
Suppose you have a DN80 cooling water line running 40 m3/h at 4 bar and 25 °C. The existing flange standard is DIN PN16. You open the Gerand data sheet archive and find the DN80 flange-to-flange dimension is 250 mm. The differential pressure curve shows 0.12 bar at 40 m3/h. That pressure drop works for the current pump. You send these values to Silver Automation Instruments. We cross check the same conditions and quote a direct replacement
This method takes less than ten minutes on site. It avoids the common mistake of ordering a meter that fits the flange rating but not the face-to-face length.
When You Cannot Find the Gerand Data Sheet You Need
Some older Gerand files are not online. The model number may be worn off the nameplate. But you can still take a photo of the meter body, the flange, and the tag. Send it to Silver Automation Instruments. We can normally identify the series by the body shape, flange drilling, and pipe size. Then we check our archive for the flange-to-flange dimension and differential pressure curve.
For a faster quote, include the process fluid, minimum and maximum flow rate, operating pressure in bar, operating temperature in °C, pipe size in DN, and the flange standard. If you need ATEX Zone 1 or SIL suitability, tell us at the start. That detail changes the model and the lead time.
How Silver Automation Instruments Supports Gerand Users
Silver Instruments supplies Coriolis mass flow meters, electromagnetic flow meters, ultrasonic flow meters, vortex flow meters, oval gear flow meters, thermal mass flow meters, pressure transmitters, and paperless recorders. For Gerand users, we offer data sheet checks, technical cross reference, and replacement quotes. We do not just send a price list. We check the flange-to-flange size, pressure drop, and output signal before you order.
Our customers are industrial end users and distributors in Southeast Asia, Oceania, Latin America, Africa, and the Middle East. Typical sites include desalination plants, chemical batching skids, fuel depots, and food processing lines. We work with 10 to 100 person SMEs that need a clear answer without long email chains.
Contact Silver Automation Instruments for archive access or a quote.
Tel: +86-25-68650347
Whatsapp: +86-25-52155837
WeChat: +86 15365082610
FAQ: Gerand Flow Meter Data Sheet Archive
What is included in the Gerand flow meter data sheet archive?
The archive includes flange-to-flange dimensions, differential pressure curves, accuracy data, material lists, flange ratings, and wiring notes. Standard sizes cover DN15 to DN300.
How do I read a flange-to-flange dimension from a Gerand data sheet?
Look for the dimension drawing on the first or second page. The flange-to-flange length is the distance between the two sealing faces. Check it against your existing pipe spool before you order.
Can Silver Automation Instruments supply a direct replacement for a Gerand flow meter?
Yes. Send the Gerand model number or a photo of the nameplate and the meter body. We cross check the flange-to-flange dimension, differential pressure curve, and output type. Then we quote a direct replacement or a Silver Instruments equivalent.
What information do I need to send for a quick quote?
Send your pipe size in DN, flow range, operating pressure in bar, temperature in °C, fluid name, and flange standard. If the application is ATEX Zone 1 or requires HART communication, state that also.
Do the differential pressure curves apply to gas and liquid?
Each curve is based on a reference fluid, usually water or air. For viscous liquids, slurries, or compressed gas, the pressure drop changes. Silver Instruments can recalculate the curve for your actual density and viscosity.
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