Chemical Compatibility

Air Release / Combination Air Valve — Gases & Elemental/Inorganic Misc

Moderate evidence

Named chemicals

entrained airvacuumoff-gas from leach solutionscarbon dioxide

What LibertyCES's vendor documentation shows

Moderate and deliberately scoped: this is air/vacuum management in a liquid line, not aggressive-gas service, but it belongs here because the medium handled is the gas phase. The finding worth publishing is the D20/D25/D26 continuous air gap design — a conical body / funnel-shaped lower body that physically separates the water or leach solution from the sealing mechanism, so scale and mineral deposits cannot foul the seal. That is a specific answer to closed-loop leach-solution scaling, the documented failure mode for conventional float-seal air valves in mining service.

Materials documented for this service

Reinforced nylon
Polypropylene
PVDF
Stainless steel 316
Super duplex
Hastelloy springs
Fusion-bonded epoxy coating per DIN 30677-2 on cast steel/ductile iron bodies

Products cited for this service

Netafim DG10 (air release only, 0.1-10 bar, high-strength composite body, patented rolling-seal mechanism less sensitive to pressure differential than a direct float seal)Netafim D40 (combination air release + air/vacuum, 0.2-16 bar)Netafim D40L (combination for liquids with suspended solids; PP 10 bar, reinforced nylon-PVDF-Duplex-SST 16 bar)Netafim D20 (combination for mining conduction systems, 0.05-16 bar, continuous air gap design)Netafim D25 (reduced-bore compact, non-clean water, 0.05-10 bar)Netafim D26 (full-bore, non-clean water/mining, 0.05-16 bar, optional adjustable non-slam check-valve discharge throttling in 1/2/3-hole configurations)

Sourced to

data/vendor-sources/netafim-mining-heap-leaching.md

Every material and product claim on this page traces to the vendor documentation listed above. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.

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