Pilot-Operated Control Valve for Mining / Heap Leaching
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Request a Spec Review →What LibertyCES's vendor documentation shows
Netafim's 'MIN' mining configuration across 75/90/100 is an ALD70 diaphragm + SST 316 spring, with Hastelloy as an upgrade. The high-value finding lives here: the ALD70 chart rates sulfuric acid at only 38°C max — far more restrictive than the body/liner materials at the same acid — so on a sulfuric heap-leach quote the DIAPHRAGM is the limiting material, not the body. ALD70 is Not Good for nitric acid even at 10%, chlorine dioxide, and chlorine gas; Netafim's own catalog names Hastelloy as the substitute because it 'is resistant against chlorine gas, hypochlorite and chlorine dioxide solutions.'
Products cited in this application
Real Specifications
| 75 Series pressure & temperature | 3/4"-4"R: 10 bar/145 psi; 3"H-8"R: 12 bar/175 psi; both 60°C/140°F max | netafim-mining-heap-leaching.md |
| 90 Series pressure & temperature | 8-10 bar/115-145 psi (size-dependent), 40°C/104°F max | netafim-mining-heap-leaching.md |
| 100 Series pressure | 16 bar/230 psi or 25 bar/365 psi, metal body (cast iron/ductile iron/bronze/stainless) | netafim-mining-heap-leaching.md |
| ALD70 diaphragm sulfuric acid rating | 38°C max — far more restrictive than the body/liner materials at the same acid concentration | netafim-mining-heap-leaching.md |
On a sulfuric heap-leach quote, the ALD70 diaphragm — not the body or liner material — is the limiting component at only 38°C max; ALD70 is also rated Not Good for nitric acid even at 10%, chlorine dioxide, and chlorine gas, with Hastelloy named by Netafim's own catalog as the substitute for those three chemistries specifically.
Most suppliers would spec this valve off the body material and call it done. The diaphragm elastomer is the part that actually fails first on a sulfuric leach circuit — Netafim's own chart puts ALD70's ceiling at 38°C, which is the number that decides whether this valve survives the application, not the pressure rating on the nameplate.
Every claim on this page traces to real, vendor-published documentation on file with LibertyCES. Confirm current specifications with the manufacturer before final specification.
Related Guides
FAQ
Is Pilot-Operated Control Valve used in Mining / Heap Leaching?
Netafim's 'MIN' mining configuration across 75/90/100 is an ALD70 diaphragm + SST 316 spring, with Hastelloy as an upgrade. The high-value finding lives here: the ALD70 chart rates sulfuric acid at only 38°C max — far more restrictive than the body/liner materials at the same acid — so on a sulfuric heap-leach quote the DIAPHRAGM is the limiting material, not the body. ALD70 is Not Good for nitric acid even at 10%, chlorine dioxide, and chlorine gas; Netafim's own catalog names Hastelloy as the substitute because it 'is resistant against chlorine gas, hypochlorite and chlorine dioxide solutions.' This is strong evidence.
What products are specified for Pilot-Operated Control Valve in Mining / Heap Leaching?
Documented examples include Netafim 75 Series diaphragm-actuated hydraulic/electric control valve (PP; 3/4"-4"R at 10 bar/145 psi, 3"H-8"R at 12 bar/175 psi, 60°C/140°F max), Netafim 90 Series (PVC body / PPS bonnet, 8-10 bar / 115-145 psi size-dependent, 40°C/104°F max), Netafim 100 Series (cast iron / ductile iron / bronze / stainless, 16 bar/230 psi or 25 bar/365 psi), Netafim Flushing Valve with Timer (PP 75 or PVC 90 body, 9V battery, IP67/NEMA 4X, 1-year+ autonomous) — confirm current specifications with the manufacturer before final selection.
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