| 🏠 Assurance Home | 📊 KPIs | ⚠️ Diagnostics

🧭 1. Stage Purpose

• Remove divalent ions (primarily SO₄²⁻, Ca²⁺, Mg²⁺) using a specialized nanofiltration system
• Reduce scaling potential for downstream systems
• Protect IX from sulfate loading (critical for YieldMax)
• Produce a conditioned stream suitable for selective ion exchange
• Separate water into:
  • Permeate (low divalent ions → forward to IX)
  • Concentrate (high divalent ions → waste or further processing)

📊 2. Normal Operating Envelope

• Feed Flow Rate:  5 to 100’s GPM
• Permeate Flow:  5 to 100’s of GPM
• Recovery (%): 70-80%
• ΔP across membranes: ___ psi (clean) → ___ psi (cleaning trigger)
• Permeate Quality: Low sulfate, stable conductivity

🟢 3. What “Normal” Looks Like

• Stable permeate flow and recovery
• Gradual (not rapid) increase in ΔP over time