Hydro mining containers · HK3 V2, V6, HD5

Coolant for ANTSPACE HK3 Hydro Containers

Q: What coolant does an ANTSPACE HK3 use?

An inhibited ethylene glycol antifreeze mixed for the site's coldest weather. Bitmain's coolant table asks for pH 7 to 9, reserve alkalinity of at least 4 mL for an organic-acid inhibitor, boron, silicon, phosphorus, molybdenum and calcium each under 20 mg/kg, and aluminum, iron and copper ions each under 50 mg/L.

Q: Why does the inhibitor chemistry matter for HK3?

The table caps boron, silicon, phosphorus and molybdenum, the elements left behind by borate, silicate, phosphate and molybdate inhibitors. A nitrite-free inhibitor without those salts stays under the caps.

Q: How much coolant does an HK3 container take?

The V6 manual puts the fill at roughly 1.3 to 1.5 tonnes of coolant per container, about 1.2 to 1.4 totes of 275 gallons (a tote of 40% premix weighs about 1.1 tonnes). Take the exact figure from your container's fill schedule.

Q: What concentration should a Texas site run?

Around 40% ethylene glycol covers a hard Texas freeze like February 2021 with margin. Very cold northern sites may need Bitmain's -45 °C low-temperature grade, which our premix does not reach.

Q: How often should HK3 coolant be tested?

Check pH every 6 months and run a full coolant test at least once a year. The V6 manual says to drain and replace the coolant after 1 to 2 years.

Q: Can I top up with tap water?

No. Tap water adds hardness and chloride and dilutes the inhibitor. Top up leaks with premix and use deionized water only for evaporative loss.

For Bitmain ANTSPACE HK3 hydro container: ANTSPACE HK3 V2, ANTSPACE HK3 V6, ANTSPACE HD5. Blended and shipped from Taylor, Texas, with a certificate of analysis on every lot.

See the coolant Get a tote quote

The short answer

Quick answer

ANTSPACE HK3 containers run an inhibited ethylene glycol antifreeze, chosen for the site's coldest weather, with pH 7 to 9 and tight caps on boron, silicon, phosphorus, molybdenum and calcium (each under 20 mg/kg). A nitrite-free inhibitor with no silicate, borate or molybdate and only a trace of phosphate fits that table, so for Texas and other freeze-exposed sites we supply our nitrite-free inhibited ethylene glycol premix, plus deionized water for flushing and make-up.

Hydro mining container with rooftop dry-cooler fans being filled with coolant from an Alliance Chemical IBC tote through a portable transfer pump

What to order

The products that fit this spec, and what each one is for.

Container fill

Inhibited Ethylene Glycol 40/60, Nitrite-Free

Nitrite-free inhibitor with no silicate, borate or molybdate and only trace phosphate, so it stays under the elements the HK3 table caps. 40% ethylene glycol premix, ready to pump in.

Freeze point: about -25 °C (-13 °F) typical · Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDS SDS

Flush and make-up

Deionized Water ACS Reagent Grade

Conductivity under 1 µS/cm. Use it to flush new piping before the fill and for evaporative top-off only; top up leaks with premix.

Quart to 330-gallon tote · COA with every lot

See sizes and pricing TDS SDS

Need a different concentration? We blend to the freeze point you specify, in pails, drums and 275- or 330-gallon totes.

What Bitmain requires

The coolant rules from the manufacturer's published documentation.

CoolantEthylene glycol antifreeze with corrosion inhibitor, ratio chosen for local climate; the V6 manual also allows deionized or pure water

pH7 to 9; do not run below 7

Reserve alkalinity4 mL or more for an organic-acid inhibitor (9 mL or more for an inorganic one)

Element capsBoron, silicon, phosphorus, molybdenum and calcium each under 20 mg/kg

Metal ionsAluminum, iron and copper each under 50 mg/L; total hardness under 120 mg/L

Container sizeAbout 210 miners, roughly 1 MW, per HK3

TestingFull coolant test at least yearly, pH every 6 months; drain and replace after 1 to 2 years (V6 manual)

Low-temperature gradeBitmain lists a -45 °C freeze-point coolant for very cold sites

Source: Bitmain ANTSPACE HK3 V2 water-cooling container parameter specifications (coolant table as reproduced in the HK3 maintenance guides).

Spec check, line by line

HK3 coolant requirements against our nitrite-free EG premix

Parameter	HK3 requirement	What we supply	Status
pH	7 to 9	Product specification 8.0 to 9.5; measured value on the lot COA	Check COA
Reserve alkalinity	≥ 4 mL (organic inhibitor)	Measured per lot (ASTM D1121) and reported on request	On request
Boron, silicon, phosphorus	< 20 mg/kg each	No borate or silicate in the inhibitor; phosphate is a trace (under 0.002% as trisodium phosphate, about 2 mg/kg as P); blend water silicate ≤ 0.01 mg/L	Meets
Molybdenum	< 20 mg/kg	No molybdate in the SDS composition; ICP result on request	On request
Calcium / total hardness	Ca < 20 mg/kg; hardness < 120 mg/L	Blend water Ca ≤ 0.1 and Mg ≤ 0.1 mg/kg	Meets
Aluminum, iron, copper ions	< 50 mg/L each	Blend water Fe ≤ 0.01 and Cu ≤ 0.01 mg/kg; aluminum on request	Meets
Appearance	No odor or sediment	Clear, colorless liquid	Meets
Freeze point	Site-dependent; -45 °C for the low-temperature grade	About -25 °C (-13 °F) typical, -23 °C (-10 °F) max. Covers Texas winters; does not reach the -45 °C grade	Does not meet

"Meets" rows are taken from our controlled specifications: the product technical data sheet and the deionized water specification we blend with. "On request" values are measured per lot and sent with your order when you ask.

Questions

What coolant does an ANTSPACE HK3 use?

An inhibited ethylene glycol antifreeze mixed for the site's coldest weather. Bitmain's coolant table asks for pH 7 to 9, reserve alkalinity of at least 4 mL for an organic-acid inhibitor, boron, silicon, phosphorus, molybdenum and calcium each under 20 mg/kg, and aluminum, iron and copper ions each under 50 mg/L.

Why does the inhibitor chemistry matter for HK3?

The table caps boron, silicon, phosphorus and molybdenum, the elements left behind by borate, silicate, phosphate and molybdate inhibitors. A nitrite-free inhibitor without those salts stays under the caps.

How much coolant does an HK3 container take?

The V6 manual puts the fill at roughly 1.3 to 1.5 tonnes of coolant per container, about 1.2 to 1.4 totes of 275 gallons (a tote of 40% premix weighs about 1.1 tonnes). Take the exact figure from your container's fill schedule.

What concentration should a Texas site run?

Around 40% ethylene glycol covers a hard Texas freeze like February 2021 with margin. Very cold northern sites may need Bitmain's -45 °C low-temperature grade, which our premix does not reach.

How often should HK3 coolant be tested?

Check pH every 6 months and run a full coolant test at least once a year. The V6 manual says to drain and replace the coolant after 1 to 2 years.

Can I top up with tap water?

No. Tap water adds hardness and chloride and dilutes the inhibitor. Top up leaks with premix and use deionized water only for evaporative loss.

Quote a fill

Tell us the site, the number of totes or the system volume, and the date the coolant has to be on site. We reply with pricing, freight and lead time.

Bitmain, Antminer and ANTSPACE are trademarks of their respective owners. Alliance Chemical is not affiliated with or endorsed by Bitmain. Requirements are quoted from Bitmain's published HK3 coolant specifications; confirm against your container's current manual and warranty terms before filling.