A KSB Data Checklist: Danais 150, Rose Stats, Henry Stats, and CVs

If you landed here after typing ksb acronym or rose stats henry stats cvs into a search engine, you're in the right place. I've spent seven years specifying and buying KSB pumps and valves. I've personally made (and documented) 14 significant mistakes, totaling roughly $32,000 in wasted budget. Now I maintain our team's equipment checklist. This page is that checklist, with the context I wish someone had given me.

Use this when you need to review a KSB datasheet, compare a quotation, or explain why a KSB DANAIS 150 will or won't work in your pipeline. It's short enough for the truck or the office: five steps, plus a few field notes.

Two things to know first

What does the KSB acronym mean?

The KSB acronym stands for the company's founders: Klein, Schanzlin & Becker. The company's official history pages (as of February 2025, at least) still make that clear.

That's it. Not a product category, not a German technical word, and not a material code. When someone says “KSB pump,” they mean a pump made by KSB. The acronym is the easy part.

What is a KSB Danais 150?

A KSB DANAIS 150 is a butterfly valve, not a pump. The “150” is the nominal diameter in millimeters. In my first year (2017), I made the classic mistake of assuming it was a pump model. The return shipping cost more than the part itself. If you arrived here searching for ksb danais 150, you’re probably looking at a valve datasheet, a torque table, or a Cv table.

The five-step checklist

Step 1: Confirm the exact product line and variant

“Danais 150” is a starting point, not a full specification. There are variants with different bodies, seats, pressure ratings, and flange standards. A KSB DANAIS 150 in cast iron with an EPDM seat is not the same as one in stainless steel with a PTFE seat. Check every line of the nameplate. If the datasheet doesn't show a variant suffix or order number, ask for it.

• Model, DN, PN, and max temperature.
• Body material and seat material.
• Face-to-face dimension and flange drilling standard.
• The official KSB data sheet, not a screenshot from a distributor's catalogue.

Step 2: Find the official performance data, not a nickname file

For a pump, the official performance data is the pump curve. For a valve, it's the Cv table. Cv is the flow coefficient—the number that shows how much water passes through the valve at a given pressure drop. People often write “cvs” when they mean multiple Cv values, which makes search results noisy.

This is where rose stats and henry stats usually show up. These are not standard KSB terms. In our office, Rose and Henry were engineers who left years ago. Their files, named “rose stats” and “henry stats,” still float around the shared drive. I once trusted a “henry stats” spreadsheet for a viscous oil application. It was water test data. The pump didn't perform anywhere near the curve, and the line had to be re-piped.

If a file name has a person's name in it, treat it as a clue, not proof. Ask for the official as-tested curve with the serial number, the date, and the test fluid.

Step 3: Check the pressure and temperature limits

A valve size does not tell you the pressure rating. A KSB DANAIS 150 with a PN10 rating will not handle the same pressure spike as a PN25 version. I once approved a valve after checking only the DN. The actuator bracket failed during a startup surge because the pressure spike exceeded the rating. That cost $890 and a one-week delay (unfortunately).

Write the system's maximum pressure and temperature on the same line as the valve model. Then compare both to the datasheet.

Step 4: Size the actuator with the torque table

Trust me on this one: never approve a KSB DANAIS 150 without checking the torque table. The valve's size, Cv value, and seating torque are not the same thing. I saved $300 by accepting the default actuator. It looked fine on the screen, but the actuator couldn't close the valve under full differential pressure. The replacement cost $1,700 plus a week of downtime. The “budget” choice turned out to be the expensive one.

A simple rule: use the torque at the actual differential pressure, not the nominal pressure rating. A 150 mm valve in a clean water line might need far less torque than the same valve in a slurry line.

Step 5: Turn the documents into a record that survives people

There's something satisfying about a clean data folder. After the stress of the early mistakes, seeing one file with the order number, date, pump tag, and Cv table is the payoff. The best part is no more 3am worry sessions about whether the order will arrive.

When you save a data file, don't name it “rose stats” or “henry stats.” Name it with the pump tag, the order number, the date, and the fluid. Include the Cv table in the same folder. If someone calls it “cvs” instead of Cv values, a future engineer will still understand.

Since I made this the team standard, we've caught 47 potential errors in quotations and datasheets over the past 18 months. That's 47 site visits that did not happen.

Field notes: mistakes I still avoid

The most frustrating part of this work is that the mistakes are quiet. You'd think a written specification would prevent them, but interpretation varies wildly. After the third actuator mismatch at the start of 2024, I was ready to stop specifying KSB entirely. What finally helped was making the checklist permanent.

• Don't ask “What is a KSB Danais 150?” as if there's one answer. Ask which DANAIS 150: which PN, which seat, which flange?
• Don't rely on “rose stats” or “henry stats” files. They're clues, not proof.
• Don't buy a “budget” actuator for a KSB DANAIS 150. Match the torque to the actual duty and pressure surge.
• Don't forget small orders. When I was starting out, the distributor who treated my $200 order seriously is the one I still use for $20,000 orders. Small doesn't mean unimportant—it means potential.

Total cost of ownership is the number to remember: valve + actuator + installation + downtime if it fails. The lowest quoted price is rarely the lowest total cost.

If you take nothing else from this, take the checklist: confirm the model, get the official performance data, check the limits, size the actuator from the torque table, and write the file name so a stranger can find the data. That sounds simple. It took me $32,000 in mistakes to make it my default.