Product Overview
SL Corrosion-Resistant Vertical FRP Chemical Pump is a vertical single-stage centrifugal pump manufactured with FRP (Fiber Reinforced Plastic) wetted components for corrosive chemical liquid transfer.
It solves corrosion failure, metal degradation, and short service life problems in acidic and alkaline fluid handling systems.
It is suitable for chemical process circulation, acid/alkali transfer, and industrial wastewater containing corrosive media.
Model Designation
Applications
Typical Operating Scenarios
- Acid pickling solution circulation tanks
- Alkali solution transfer from storage tanks
- Chemical process sump pit vertical pumping
- Electroplating solution circulation systems
- Corrosive industrial wastewater lifting
Engineering Advantages
Structural Design Logic + Engineering Result
FRP molded casing and impeller provide high resistance to acid and alkali corrosion.
Vertical long-shaft structure allows immersion installation without mechanical seal exposure.
Bearing positioned outside corrosive medium reduces wear and maintenance frequency.
Simple hydraulic structure ensures stable performance under low to medium head chemical transfer duty.
Non-metallic wetted parts eliminate galvanic corrosion.
System Components
SL Corrosion-Resistant Vertical FRP Chemical Pump mainly consists of:
- FRP pump casing
- FRP impeller
- Pump shaft
- Shaft sleeve
- Bearing assembly
- Support frame / base plate
- Discharge pipe section
- Motor (top mounted)
Technical Data
Service Conditions
- Corrosive acids and alkalis within FRP compatibility range
- Solid content ≤ small non-abrasive particles
- Continuous industrial operation
Operating Conditions
- Flow Rate: 3.2 – 12.5 m³/h
- Head: 12.5 – 32 m
- Power Range: 0.55 – 4 kW
- Speed: 2900 rpm
- Liquid Temperature: ≤ 80°C
- Working Pressure: ≤ 0.6 MPa
Detailed parameter tables are provided below.
Installation & Dimensions
Outline Drawing
Performance Data
| 1 | Pump Body |
| 2 | Impeller |
| 3 | Pump Cover |
| 4 | Stationary Ring Gland |
| 5 | Mechanical Seal |
| 6 | Bracket |
| 7 | Stud Bolt |
| 8 | Motor |
| 9 | Impeller Shaft |
Performance Parameters
| Model |
Flow Rate
m3/h |
Head
m |
Speed
r/min |
NPSH
m |
Efficiency
% |
Motor Power
kW |
| SL25-12.5 | 3.2 | 12.5 | 2900 | 3 | 37 | 0.55 |
| SL40-20 | 6.3 | 20 | 2900 | 3 | 45 | 1.1 |
| SL50-20 | 12.5 | 20 | 2900 | 3 | 57 | 2.2 |
| SL50-32 | 12.5 | 32 | 2900 | 3 | 47 | 3/4 |
Product Models & Specifications
| Model | DN | D | D1 | D2 | b | n | d | L1 | L2 | H | H1 | D3 | D4 | b1 | n1 | d1 |
| SL25-12.5 | 25 | 115 | 85 | 65 | 15 | 4 | 14 | 110 | 130 | 430 | 70 | 125 | 100 | 16 | 4 | 14 |
| SL40-20 | 40 | 145 | 110 | 88 | 19 | 4 | 18 | 140 | 160 | 460 | 80 | 150 | 110 | 15 | 4 | 14 |
| SL50-20 | 50 | 160 | 125 | 100 | 21 | 4 | 18 | 160 | 180 | 580 | 100 | 172 | 140 | 16 | 4 | 14 |
| SL50-32 (3 kW) | 50 | 160 | 125 | 100 | 21 | 4 | 18 | 180 | 200 | 660 | 120 | 200 | 165 | 20 | 4 | 18 |
| SL50-32 (4 kW) | 50 | 160 | 125 | 100 | 21 | 4 | 18 | 180 | 200 | 680 | 120 | 200 | 165 | 20 | 4 | 18 |
How to Select a Pump Model
Confirm chemical compatibility between medium and FRP material.
Determine required immersion depth and shaft length.
Calculate design flow and total head including vertical lift.
Verify operating temperature within ≤80°C range.
Ensure structural support meets vertical installation load requirements.
Engineering Notes
FRP material selection must correspond to chemical concentration.
Not suitable for high-abrasive slurry conditions.
Thermal expansion of non-metal materials should be considered.
Shaft alignment must be verified for long vertical configurations.
Compliance & Quality Assurance
Hydraulic performance test before delivery.
FRP material batch traceability.
Impeller dynamic balance verification.
Pressure integrity testing of casing.
Optional third-party chemical resistance verification.
Safety Notice
Do not operate under dry-running condition.
Ensure sufficient immersion depth before startup.
Do not exceed rated temperature and pressure limits.
Disconnect power before maintenance or shaft inspection.
OEM & Customization
This pump series supports engineered configuration and duty-based matching. Technical adjustments can be made according to system requirements and installation conditions.
Available options include:
• Extended shaft length
• Different FRP resin formulations
• Motor voltage & frequency
• Explosion-proof motor configuration
• Reinforced structural support
Configuration is determined based on duty point and project specifications.
Based on duty point and project specifications.
FAQs
Q1: What chemicals are compatible with FRP construction?
Compatibility depends on acid/alkali concentration and temperature; chemical resistance chart verification is required.
Q2: Can the pump handle slurry?
Only minimal non-abrasive particles; not suitable for abrasive slurry.
Q3: What is the maximum allowable liquid temperature?
≤ 80°C.
Q4: Is mechanical seal exposed to chemical medium?
No, vertical structure avoids bottom seal exposure.
Q5: How is shaft supported in long configuration?
Upper bearing support with reinforced shaft design.
Q6: Can the pump be installed outdoors?
Yes, with proper motor protection and structural support.
Q7: What is the maximum working pressure?
≤ 0.6 MPa.