Chemical Pumps
Corrosion-Resistant High-Pressure Plunger Pump Series
WS Series Duplex 2205 & SUS316 Stainless Steel High-Pressure Plunger Pumps
The WULI WS Series is engineered for demanding industrial fluid handling where standard materials suffer from rapid chemical degradation and fatigue failure. To deliver maximum durability without over-specifying non-critical components, WULI selectively utilizes premium Duplex 2205 or SUS316 stainless steel for the high-pressure manifold (cylinder)—the primary section directly in contact with corrosive media. Designed for continuous 24/7 duty in industrial cleaning, agricultural spraying, mist cooling, and wastewater treatment, the WS Series minimizes operational downtime and reduces overall total cost of ownership.
Standard pump manifolds often succumb to pitting, crevice corrosion, and stress cracking when exposed to chlorides, aggressive chemical fluids, or high-salinity effluent. Selecting a specialized corrosion-resistant manifold ensures uninterrupted plant operations, safeguards downstream infrastructure, and delivers predictable performance under high pressure.
How to Select the Right WS Series Pump (4-Step Selection Process)
Selecting the ideal WS Series plunger pump requires evaluating fluid chemistry, target pressure, volumetric flow, and power margins. Follow this technical selection guide:
- Step 1: Select Manifold Metallurgy Based on Chemical Chemistry
Analyze fluid acidity, salinity, and chloride content. Select SUS316 Stainless Steel for light washdown, general industrial water, and low-salinity fluids. Choose Duplex 2205 Stainless Steel for high-salinity brine, harsh chemical transfer, acidic media, and aggressive chloride environments. Note that only the parts fluid passes through (manifold/cylinder) are constructed from stainless steel. - Step 2: Determine Operating Pressure & Required Flow Rate
Match pump specs to process requirements. Select medium-pressure cleaning and spraying models (WS-1035F1 at 80 Bar / 35.9 L/min), high-pressure chemical models (WS-2024F1 / WS-2030F1 up to 140 Bar), or high-volume models (WS-12140 / WS-12170 up to 178 L/min) for bulk fluid transfer. - Step 3: Calculate Required Power Output (HP / kW)
Size your electric motor or drive engine using standard hydraulic power formulas:Note: Always add a 10–15% power safety margin to compensate for mechanical drive losses and system friction.Imperial Formula: Electric Motor HP = [Flow (GPM) × Pressure (PSI)] / 1450Metric Formula: Required Power (kW) = [Flow (L/min) × Pressure (Bar)] / 400 - Step 4: Verify Drive Alignment & Continuous Duty Speed
Align pump shaft style with motor coupling and confirm operating RPM for smooth 24/7 continuous operation.
Manifold Options: Duplex 2205 vs. SUS316 Stainless Steel
SUS316 Stainless Steel Manifold (Cylinder)
Engineered for standard industrial chemical transfer, general water treatment, and standard washdown applications. SUS316 manifolds deliver excellent baseline corrosion resistance and structural integrity, offering an economical choice for routine cleaning and low-salinity fluids.
Key Applications
- General industrial water circulation & spray systems
- Industrial cleaning & factory equipment washdowns
- Agricultural spraying & mist cooling systems
- Low-salinity fluid handling & mild chemical transfer
Technical Advantages
- Standard austenitic stainless alloy providing proven chemical resistance
- Cost-effective capital investment for mild operating environments
- Precision-machined wetted cylinder surfaces to reduce fluid turbulence
Duplex 2205 Stainless Steel Manifold (Cylinder)
Designed specifically for aggressive fluid environments characterized by high chloride levels, high salinity, or heavy fatigue stress. Featuring a dual austenitic-ferritic microstructure, Duplex 2205 provides roughly twice the mechanical yield strength of SUS316 along with outstanding resistance to pitting and stress corrosion cracking.
Key Applications
- High-salinity brine circulation & seawater mist cooling
- Industrial wastewater treatment & chemical effluent processing
- Harsh chemical transfer & acidic solution metering
- Continuous 24/7 heavy-duty high-fatigue pumping
Technical Advantages
- High PREN rating resists chloride pitting & crevice corrosion
- ~2x mechanical yield strength compared to conventional 316 steel
- Exceptional endurance against fatigue cracking under pulsating pressure
Quick Pump Selection Guide
| Model Name | Max Pressure | Max Flow Rate | Manifold Material | Primary Applications | Target Buyer / System Type |
|---|---|---|---|---|---|
| WS-1035F1 | 80 Bar (1100 PSI) | 35.9 L/min (9.5 GPM) | Duplex 2205 / SUS316 | Industrial cleaning, agricultural spraying, mist cooling | Equipment builders, system integrators, OEM buyers |
| WS-12140 | 85 Bar (1200 PSI) | 150 L/min (39.4 GPM) | Duplex 2205 / SUS316 | High-volume process transfer, brine handling | Industrial effluent plants, brine system OEMs |
| WS-12170 | 85 Bar (1200 PSI) | 178 L/min (46.8 GPM) | Duplex 2205 / SUS316 | Bulk fluid movement, high-capacity wastewater processing | Large-scale industrial processing facilities |
| WS-1770 | 120 Bar (1700 PSI) | 73.3 L/min (19.5 GPM) | Duplex 2205 / SUS316 | Medium-scale recirculation, wastewater transfer | Wastewater plants, chemical circulation operators |
| WS-2024F1 | 140 Bar (2000 PSI) | 24.7 L/min (6.5 GPM) | Duplex 2205 / SUS316 | High-pressure chemical washing, dosing skids | Chemical skids, high-pressure equipment OEMs |
| WS-2030F1 | 140 Bar (2000 PSI) | 29.6 L/min (7.9 GPM) | Duplex 2205 / SUS316 | Chemical spraying, process fluid filtration | Process system integrators, wash system builders |
Frequently Asked Questions (FAQ)
Q1: Why is Duplex 2205 recommended over standard SUS316 for corrosive fluids?
Duplex 2205 contains higher proportions of chromium, molybdenum, and nitrogen than SUS316, resulting in a higher Pitting Resistance Equivalent Number (PREN). This chemical structure provides superior resistance against chloride-induced pitting, crevice corrosion, and stress corrosion cracking in high-salinity and harsh chemical environments.
Q2: Is the entire WS Series pump constructed from stainless steel?
No. WULI selectively applies Duplex 2205 or SUS316 specifically to the high-pressure manifold (cylinder)—the critical section in direct contact with pumping fluids under pressure. Drive-end components utilize robust industrial alloys, maximizing operational longevity while delivering capital cost efficiency.
Q3: Which industrial applications suit the WS Series best?
The WS Series is widely deployed across industrial cleaning, agricultural spraying, mist cooling, industrial wastewater treatment plants, high-salinity brine recirculation loops, and chemical metering skids.
Q4: How do I select between SUS316 and Duplex 2205 manifold options?
For mild chemical solutions and general water applications, SUS316 manifolds provide exceptional reliability and economy. For media high in chlorides, acidic solutions, or continuous 24/7 high-fatigue operations, Duplex 2205 manifolds are strongly recommended.
Why Global B2B Partners Choose WULI WS Series Pumps
- Selective Alloy Engineering: High-grade Duplex 2205 / SUS316 stainless steel applied precisely to the manifold (cylinder) wetted section for optimal cost-to-performance efficiency.
- 24/7 Continuous Duty: Heavy-duty drive end, solid ceramic plungers, and industrial V-packings designed for uninterrupted factory operations.
- Versatile Performance Coverage: Ranges from industrial cleaning & agricultural spraying (80 Bar) to high-pressure jetting (140 Bar) and ultra-high-flow transfer (up to 178 L/min).
- Low Maintenance Architecture: Modular valve and seal assemblies simplify field maintenance and cut operational downtime.
- 100% Made in Taiwan: Built with precision manufacturing, rigorous quality testing, and comprehensive global technical support.
