EV battery and power electronics

Different fluid. Different standard. Same seal.

This is an adjacent application, and it is worth saying so. The fluid is glycol-heavy rather than the dilute premix a data-centre loop runs, the qualification language is automotive, and volumes are counted in production units rather than halls. The seal physics are unchanged.

Tested envelope PG50and above

Element change-out 35psid

Ask for the specification sheet

Battery module on a test fixture with coolant lines coupled to its cold plate and a charge cabinet behind

Module fixture · coolant lines coupled, charge cabinet behind

01 / Compatibility

A tested envelope, not a blanket claim

EPDM is a non-polar hydrocarbon elastomer. That is why it performs in water, glycol and phosphate-ester fluids, and poorly in hydrocarbon oils. Cure system decides what the fluid extracts.

Immersion test rows, the cure mechanism, and the flow consequence of concentration.
Row	Figure or mechanism	Basis
Volume swell	10 % or less · target	At PG50, after 168 hours at 70–100 °C.
Mass change	5 % or less · target	The same immersion, with extraction reported.
Test method	ISO 1817	A figure to ask a supplier for and verify, not a limit published here.
Cure system	Peroxide	Sulphur cure introduces sulfate; it shows as chemistry drift, not a visible leak.
Viscosity at 20 °C	1.68–8.20 mPa·s	Across 15 % to 55 % propylene glycol. Turndown and low-flow cut-off move with it.

02 / Filtration

Multi-housing filtration skid on a production floor, housings and pipework filling the frame

Filtration sized to a production volume

A side-stream unit treats a fraction of circulating volume and polishes the loop over hours. Full-flow filtration of a large volume demands pump energy and footprint, which is why side-stream is the usual answer here.

Item	Figure
Nominal media	90 % retention
Absolute media	99.98 % retention
Sizing, full flow	about 2× the required rating
Sizing, side-stream	about 10× the required rating
Change-out trigger	35 psid, inside a 60 psid collapse limit

03 / Detection

The fluid decides which principle can work

A leak here is a safety event rather than a cost event, so the detection requirement is derived from the fluid and the enclosure rather than from a catalogue page.

Conductivity floor

An electromagnetic flow meter needs a minimum conductivity, and a near-deionised loop can sit below it.

Rope rated from PG15

Conductive rope sensing is rated from 15 % propylene glycol by weight upward, covering PG15, PG25 and PG35.

Tray probes above the envelope

A blend above that envelope needs the tray-probe arrangement rather than rope coverage alone.

Latching and reset

Point probes inside enclosures, with alarm latching and a reset that requires a deliberate action.

04 / Model codes

Pick the codes without leaving the page

EMS-CL-PG50 Inhibited propylene glycol premix, 50 % v/v Freeze point −35.0 °C, pH 7.0–8.5. PDF
EMS-CL-PG55 Inhibited propylene glycol premix, 55 % v/v Freeze point −43.3 °C, viscosity 8.20 mPa·s. PDF
EMS-HP-E16-20 EPDM cooling hose, −16 dash (1 in bore), 20 m coil Peroxide-cured tube; ISO 1817 rows on the sheet. PDF
EMS-HP-E24-20 EPDM cooling hose, −24 dash (1-1/2 in bore), 20 m coil Burst margin stated against working pressure. PDF
EMS-HP-FQD-04 Quick-disconnect coupling, size 04 Dry-break figure at 0 psi and at 200 psi. PDF
EMS-CF-F5-20 Pleated depth cartridge, 5 µm, 20 in The side-stream element for a large volume. PDF
EMS-CF-F1-20 Pleated depth cartridge, 1 µm absolute, 20 in 99.98 % retention at the rated rating. PDF
EMS-CF-S15 Side-stream filtration unit, 15 % divert setpoint Polishes the loop over hours rather than at full flow. PDF
EMS-LD-P1 Surface point probe, 4.3 m leader Inside the enclosure, where the fluid can reach it. PDF
EMS-LD-C8 8-channel distance-read leak panel Latching alarms; the reset is a deliberate action. PDF