High-Capacity FRPP Vertical Pump Solution: 12,000 L/H Filtration, 0 Leakage, Annual Savings
How an Indian electroplating facility eliminated pump corrosion, frequent downtime, and EHS risks across pickling, anodising, and zinc-nickel plating lines with 15 flameproof-certified vertical pumps
Meibao pumps provide stable corrosion resistance with little leakage during continuous operation. The vertical design keeps the motor away from acid fumes. They help prevent air intake and cavitation when liquid levels change, ensuring stable pickling liquid circulation to the filters. Compared with other brands, they require much less maintenance and effectively reduce operating costs.
Title High-Capacity FRPP Vertical Pump Solution: 12,000 L/H Filtration, 0 Leakage, $2,500 Annual Savings Subtitle
How an Indian electroplating facility eliminated pump corrosion, frequent downtime, and EHS risks across pickling, anodising, and zinc-nickel plating lines with 15 flameproof-certified vertical pumps Customer Testimonial
Act 1: The Challenge —— Large-Scale Production, High Acid Fumes, and Explosion-Proof Requirements
Background
The customer is an electroplating company in India with large-scale surface treatment lines covering several processes, including pickling, anodising, and zinc-nickel plating. Different process stages use hydrochloric acid, a 20% sulfuric acid mixture, and various plating solutions, with operating temperatures reaching 60–65°C.
A total of 15 tank positions require pumps to continuously circulate the process liquids to filtration units, keeping the bath clean and maintaining process stability. However, the customer was facing more than just corrosion problems. Hydrogen released during the electroplating process can mix with acid fumes and create a potential explosion risk, making strict explosion-proof requirements necessary for the pumps.
Detailed Pain Points
The customer's previous pump system had serious problems in several areas:
- Acid Fume Corrosion: Open pickling tanks continuously released high concentrations of mixed HCl + H₂SO₄ fumes. Horizontal pump motors and bearings were exposed to the fumes for long periods, causing frequent electrical failures
- Medium Corrosion: The 20% mixed acid contained iron oxide sludge, causing both chemical corrosion and abrasive wear on wetted parts
- Weakness of Horizontal Pump Design: The shaft seal was a weak point, resulting in 2–4 acid leakage incidents per year, contaminating the workshop and creating safety risks
Safety Risk: Hydrogen from the electroplating process could mix with acid fumes and create an explosive atmosphere in enclosed areas, while the previous pumps had no explosion-proof certification
The average pump life was only 12 months. Every failure forced the related production line to stop for maintenance, resulting in a total of 15 days of downtime per year. The annual total cost per equipment set reached $650, including purchase, maintenance, and downtime losses, creating a major cost burden across all 15 lines.
Highlight Box — Root Cause Analysis
Root Causes
1. Multiple Corrosive Media: The production line handles several corrosive media, including pickling with 20% mixed acid, anodising, and zinc-nickel plating. The previous wetted materials did not provide enough corrosion resistance
2. Acid Fumes: Open tanks continuously release HCl + H₂SO₄ fumes. Long-term exposure caused horizontal pump motors and bearings to age and fail faster
3. Weakness of Horizontal Pump Design: The shaft seal was a weak point. Acid liquid and fumes could damage the seal, causing repeated leakage
4. Solid Particles in the Liquid: Iron oxide sludge in the acid increased wear on the impeller and pump casing
5. Lack of Explosion-Proof Certification: The electroplating process produces hydrogen, but the previous equipment had no explosion-proof certification, creating a safety risk
Before Data
Metric | Before Meibao | Impact |
Pump Lifespan | 1 year average | Annual replacement required across 15 stations |
Annual Downtime | 15 days/year | ~3 full production weeks lost |
Leakage Incidents | 2–4 times/year | EHS regulatory risk, safety hazard |
Annual Equipment Cost | $650/set | Purchase + labor + downtime per unit |
Medium Concentration | 20% | Mixed HCl + H₂SO₄ |
Operating Temp | 60–65°C | Accelerates corrosion and seal wear |
Explosion-Proof | None | Hydrogen + acid mist = explosion risk |
Act 2: The Solution —— High-Flow FRPP Vertical Pumps for the Entire Line + Explosion-Proof Certification
Solution Approach
After studying the customer's actual operating conditions, we found that this was a large-scale, high-requirement replacement project:
- Scale: All 15 tank positions needed replacement, requiring one standard model to simplify maintenance
- Material: FRPP (Fiber-Reinforced Polypropylene) provides both corrosion resistance and mechanical strength, making it suitable for mixed acid, anodising solutions, and zinc-nickel plating solutions
- Design: The vertical seal-less design solves both acid fume exposure and leakage problems
- Safety: Because the electroplating process produces hydrogen, the pump motors needed explosion-proof certification
Based on these four requirements, we recommended the MFL-208-MNX-2 vertical pump. This model comes with CT4-ExdIICT4 explosion-proof certification for explosive environments containing hydrogen. It also uses a PP filter bucket, combining pumping and filtration in one unit.
Product Selection
Selection Factor | Matching Advantages of MFL-208-MNX-2 |
Vertical Design | Motor stays above the liquid and away from acid fumes |
FRPP Wetted Parts | Fiber-reinforced polypropylene provides strong resistance to pickling / anodising / zinc-nickel media |
Seal-less Design | Removes the shaft seal leakage point and is suitable for liquids containing solid particles |
Cavitation Resistance | Submerged impeller installation helps prevent air intake when the liquid level changes |
High Flow Capacity | 12,000 L/H filtration flow meets the circulation needs of large-scale production lines |
Explosion-Proof Certification | CT4-ExdIICT4 certification for hazardous environments containing hydrogen |
Integrated Filtration | PP filter bucket combines pumping and filtration in one unit |
Highlight Box — Key Technical Advantages
Seal-less Vertical Design · High-Flow Filtration · Explosion-Proof Certification
Motor Away from Acid Fumes: The vertical design keeps the motor above the liquid, reducing exposure to acid fumes
Zero-Leakage Design: No mechanical shaft seal, eliminating acid leakage
FRPP Wetted Parts: Fiber-reinforced polypropylene combines corrosion resistance with good mechanical strength
High-Flow Filtration: 12,000 L/H filtration capacity + PP filter bucket for integrated pumping and filtration
CT4-ExdIICT4 Explosion-Proof: Suitable for hazardous environments where hydrogen and acid fumes may be present
Standardized Across the Line: 15 units of the same model cover all process sections, making maintenance easier
Specification Table
Specification | Selected Model (MFL-208-MNX-2) | Key Benefit |
Wet-End Material | FRPP (Fiber-Reinforced Polypropylene) | Corrosion-resistant to mixed acid, anodising, and zinc-nickel solutions |
Drive Type | Vertical direct drive | No shaft seal, zero leakage |
Filtration Capacity | 12,000 L/H | High-volume circulation with integrated filtration |
Filter Bucket | PP (Polypropylene) | Corrosion-resistant, integrated design |
Motor Power | 2 HP (1.5 kW) | Adequate power with good energy efficiency |
Units Installed | 15 units | Full coverage for all process lines |
Sealing | Seal-less (vertical submerged) | No seal wear, no leakage |
Explosion-Proof Certification | CT4-ExdIICT4 | Safe for hydrogen + acid mist environment |
Project Timeline
Stage | Milestone | Description |
Application Assessment | Week 1–2 | On-site review of the operating conditions at all 15 tank positions, explosion-proof area classification, and piping layout |
Custom Production | Week 3–6 | Custom production of 15 MFL-208-MNX-2 units with explosion-proof motors + PP filter buckets, with full inspection before shipment |
Installation & Commissioning | Week 7–8 | Installation at all 15 tank positions, piping connection, system testing, and loaded trial operation |
Stable Operation | Month 7+ | Continuous no-failure operation to date, with ongoing follow-up |
Act 3: The Result —— Zero Leakage, Zero Downtime Across the Entire Line, $2,500 Annual Savings per Set Results
Since installation and commissioning were completed in May 2026, 15 MFL-208-MNX-2 vertical pumps have operated on the customer's three surface treatment production lines for more than 7 months. During this period, all pump units have achieved zero leakage and zero downtime:
- Corrosion Protection: The FRPP wetted parts have operated for 7 months under 20% mixed acid at 60–65°C with no visible corrosion
- Filtration Performance: The pumps provide a stable 12,000 L/H flow, while the PP filter buckets effectively remove iron oxide sludge, improving bath cleanliness
- Safety & Compliance: CT4-ExdIICT4 explosion-proof certification helps ensure safe operation in environments containing hydrogen
Managing Director Karthik highlighted that the vertical design keeps the motor away from acid fumes and helps avoid common cavitation and leakage problems found with horizontal pumps. Compared with alternative brands previously used, Meibao pumps require much less maintenance and effectively reduce operating costs.
Results Cards
✓ | $ | 🛡️ |
7+ mo | $2,500 | 0 |
Zero-downtime continuous operation | Annual cost saving per set vs. previous pumps | Leakage incidents across all 15 units |
Before vs After Comparison
Comparison | Before (Previous Horizontal Pumps) | After (MFL-208-MNX-2) | Improvement |
Corrosion | Wetted parts seriously corroded and required replacement after 12 months | FRPP wetted parts operated for 7 months with no visible corrosion | Expected service life extended 2–3× |
Leakage Incidents | 2–4 times/year | 0 times | Leakage eliminated |
Production Downtime | 15 days/year | 0 days | 3 weeks of production recovered |
EHS Compliance | Frequent acid leakage, no explosion-proof certification, high environmental and safety risks | Dry workshop floor + CT4-ExdIICT4 explosion-proof certification | Safety and compliance greatly improved |
Annual Total Cost | $650/set × 15 sets (including replacement + labor + downtime losses) | Initial investment only, with very low operating costs | $2,500+/set annual saving |
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High-Capacity FRPP Vertical Pump Solution: 12,000 L/H Filtration, 0 Leakage, Annual Savings
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