Chemical Recovery Process Pumps
Extra-heavy shaft design for high-SG liquors. TaperBore PLUS seal chamber with cooling jacket prevents liquor crystallization at seal faces.
100% dimensional interchangeability with Goulds 3196 and Durco Mark III — full STX/MTX/LTX/XLTX frame coverage for chemical recovery service.
Full compliance with TAPPI TIP 0402-27. Duplex and high-alloy wet ends resist stress corrosion cracking in hot caustic environments.
Product Details
| Application | Black liquor, green liquor, white liquor, condensate transfer in pulp and paper chemical recovery cycle. Digester circulation, evaporator feed, smelt dissolving, causticizing, and bleach plant chemical services. |
| Flow Rate | Up to 7,000 GPM (1,590 m3/h) |
| Head Range | Up to 730 ft (223 m) |
| Temperature | Up to 700 degrees F (371 degrees C) |
| Materials | CF8M (316SS), CD4MCuN (Duplex SS), CN7M (Alloy 20), WCB, Hastelloy C-276, Titanium Grade 2/Pd7B, Nickel 200 |
| Pressure Rating | ANSI Class 300, up to 375 PSIG (2,586 kPa) |
Chemical Recovery Process Pumps for Pulp & Paper
Yingsiman ANSI B73.1 chemical process pumps engineered specifically for the demanding chemical recovery cycle in pulp and paper mills. Our pumps handle black liquor, green liquor, white liquor, condensate, and other aggressive chemical streams with proven reliability across digesters, evaporators, recovery boilers, and causticizing plants.
Chemical Recovery Applications
| Process Area | Service | Recommended Materials |
|---|---|---|
| Digester | White liquor circulation, cooking liquor transfer | Duplex SS, CN7M |
| Evaporators | Black liquor feed, condensate return | CF8M, Duplex SS |
| Recovery Boiler | Smelt dissolving, weak wash | Alloy 20, Hastelloy C-276 |
| Causticizing | Green liquor, lime mud, weak wash | Duplex SS, CN7M |
| Bleach Plant | ClO₂, NaOH, H₂O₂, O₂ delignification | Titanium, Hastelloy C-276 |
| Tall Oil | Crude tall oil, acidulation | CF8M, Hastelloy C |
Key Design Features
- Extra-heavy shaft design handles up to 50% higher radial loads than standard ANSI pumps — critical for high-specific-gravity black liquor service
- Open or semi-open impeller options for solids-laden green liquor and lime mud slurries
- TaperBore PLUS seal chamber with integral cooling jacket prevents liquor crystallization at the seal face — the #1 cause of seal failure in recovery service
- Duplex and super-austenitic alloy wet-end options resist stress corrosion cracking in hot caustic environments
- Full compliance with TAPPI TIP 0402-27 pump selection guidelines for chemical recovery
Dimensional Interchangeability
100% dimensionally interchangeable with Goulds 3196 and Durco Mark III equivalents. Drop-in replacement — no piping, baseplate, or coupling modifications required. Full STX through XLTX frame coverage.
Typical Operating Data
| Parameter | Range |
|---|---|
| Flow Rate | Up to 7,000 GPM (1,590 m³/h) |
| Head | Up to 730 ft (223 m) |
| Temperature | -20°F to 700°F (-29°C to 371°C) |
| Solids Handling | Up to 8% consistency (stock) |
| Discharge Size | 1″ to 12″ |
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