Pilot-Operated Control Valve — Acids
30+ years spec experience. Send James the process data and get a real answer — not a catalog page.
Request a Spec Review →Named chemicals
What LibertyCES's vendor documentation shows
Netafim's own ALD70 diaphragm chemical-resistance chart rates sulfuric acid at only 38°C max — more restrictive than the body/liner material at the same acid, so on a sulfuric heap-leach quote the diaphragm elastomer is the limiting material, not the valve body. Real, sourced finding, not a generic acid-resistance claim.
Materials documented for this service
- ALD70 diaphragm (sulfuric acid limited to 38°C max)
- ALD70 Not Good for nitric acid even at 10%
- Hastelloy upgrade available for chlorine-based chemistries
Products cited for this service
Real Specifications
| ALD70 diaphragm — Sulfuric Acid | 38°C max, more restrictive than the body/liner material at the same acid concentration | netafim-mining-heap-leaching.md |
| ALD70 diaphragm — Nitric Acid | Rated "Not Good" even at 10% concentration | netafim-mining-heap-leaching.md |
| Netafim 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 |
| Hastelloy upgrade | Available for chlorine-based chemistries where ALD70 is rated "Not Good" | netafim-mining-heap-leaching.md |
Because the 75/90/100 Series is diaphragm-actuated — the diaphragm both controls flow and seals the process fluid — a diaphragm rated "Not Good" for nitric acid even at 10% isn't a minor derate, it's a control-valve failure, not just a seal leak, worth flagging before ALD70 gets specified on any nitric-acid-adjacent leach line.
This valve doesn't open and close on command from a separate actuator bolted on top — it's a diaphragm-actuated hydraulic/electric control valve, meaning the ALD70 diaphragm is both the control element AND the wetted seal on a sulfuric leach line. That double duty is exactly why its 38°C ceiling matters more here than on a simple on/off actuated valve.
Every material and product claim on this page traces to real, vendor-published documentation on file with LibertyCES. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.
FAQ
Is Pilot-Operated Control Valve compatible with Acids?
Netafim's own ALD70 diaphragm chemical-resistance chart rates sulfuric acid at only 38°C max — more restrictive than the body/liner material at the same acid, so on a sulfuric heap-leach quote the diaphragm elastomer is the limiting material, not the valve body. Real, sourced finding, not a generic acid-resistance claim. This is strong evidence.
What materials are documented for Pilot-Operated Control Valve in Acids service?
Materials documented for this service: ALD70 diaphragm (sulfuric acid limited to 38°C max), ALD70 Not Good for nitric acid even at 10%, Hastelloy upgrade available for chlorine-based chemistries. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm with a spec review before final specification.
What specific Acids chemicals does this cover?
Named chemicals in this documentation: Sulfuric Acid, Nitric Acid.
What products are cited for Pilot-Operated Control Valve in Acids service?
Documented examples include Netafim 75 Series diaphragm-actuated hydraulic/electric control valve, Netafim 90 Series, Netafim 100 Series (cast iron / ductile iron / bronze / stainless, 16 bar/230 psi or 25 bar/365 psi).
Ready to buy or need a fast answer? Call, text, or email James directly — (559) 395-5500 · [email protected].