Protection rating
Absolute rating: a 50 µm passage takes a 5 µm filter.
Step 02
Flushing skids for technology cooling loops
Flush velocity must meet or exceed the operating maximum.
Ask for the specification sheet
Velocity rule
≥operating
Envelope
6.9bar
100 psig · 60 °C.
Staging ladder
100µm · staging stage 1
Stop condition
0at ≥50 µm · cleanliness
Flush skid plumbed to a row manifold
No distribution units, no cold plates.
01 / Flow classes
Three skids, matched to published flow classes
CDU secondary flows: 20 to 450 GPM.
Viscosity 1.68 to 8.20 mPa·s, 15 % to 55 % PG.
02 / Commissioning staging
Procedure and stop condition
Commissioning staging is a procedure, not a rating.
| Cleanliness level | 15–25 µm particles | 25–50 µm particles | At or above 50 µm |
|---|---|---|---|
| Target · CCC = C(C13/D9/E-N00) | ≤5 000 /1 000 cm² | ≤350 /1 000 cm² | 0 |
| Coarser reference · A(C16/D12-N00) | ≤50 000 /1 000 cm² | ≤3 500 /1 000 cm² | 0 |
| Inlet strainer at a unit | not applicable | not applicable | 500 µm class · strainer rating |
500 µm is a strainer rating, not a filtration stage.
03 / Verification
Who says the loop is clean
Cleanliness follows ISO 16232 and VDA 19.1. 2 µm is a mesh size, 10–50 µm a depth of field, 100–300 µm a channel dimension.
04 / Micron categories
Three micron categories
Commissioning staging
Commissioning staging: 100, 50, 25 µm.
Strainer rating
500 µm unit-inlet guard.
| Position | Figure |
|---|---|
| Facility chilled-water supply at the unit | 500 µm class · strainer rating |
| Inline strainer at the entering-fluid connection | within 10 ft (about 3 m) · optional |
| Plate-and-frame heat exchanger, facility water | 35 to 40 mesh (500 to 400 µm) · strainer rating |
| In-unit secondary filtration | 50 µm / 35 mesh · strainer rating |
05 / Site hazards
Rental equipment hazards
Load banks
30 kW to 1 MW.
Rental contamination
A used load bank may carry contamination: filter its discharge. Dry the system if the fill is over 24 hours away.
06 / Pressure test
The test record
Hold 10 minutes
Hydrostatic test: pressure drop at most 0.02 MPa.
IEC 62368-1
Safety test at 1.5× rated working pressure.
Bypassed
Using the CDU in the initial flush may void warranty.
07 / Datasheets
Three documents
Ten rows minimum per skid.
-
EMS-FF-FL75
20 GPM class, rack and in-row loops.
-
EMS-FF-FL340
90 GPM class, row and room loops.
-
EMS-FF-FL1300
340 GPM class, TCS-wide. 0 particles at ≥50 µm.
After commissioning: filtration skids.