Stainless Steel Submersible Pump
Industrial Stainless Steel Submersible Pumps | Engineering & Sourcing Guide
Product Overview & Core Specifications
Engineered for municipal, industrial, and marine deployments where fluid corrosiveness or abrasion outpaces standard drainage equipment. All wetted components are precision-formed from high-grade stainless steel.
Standard Technical Parameters
• Flow Rate Range (Q): 5 m3/h to 400 m3/h
• Total Head Range (H): 10 m to 120 m
• Motor Power: 0.75 kW to 75 kW (1 HP to 100 HP)
• Voltage/Frequency: 380V/415V (50Hz), 460V (60Hz), 3-phase (Custom voltages available)
• Material Grades: AISI 304, AISI 316, AISI 316L, Duplex Stainless Steel (2205 for marine/high-salinity use)
• Ingress Protection: IP68 (Submersible up to 30 m continuous depth)
• Insulation & Temp: Class F (155°C) or Class H (180°C); Max liquid temp 40°C (Standard), up to 70°C on request.
Product Selection & Model Matrix
Match your fluid profile against our standard industrial configurations below:
|
Model Series |
Material Grade |
Max. Flow (Q) |
Max. Head (H) |
Primary Application Focus |
|
SS-304D |
AISI 304 |
50 m3/h |
35 m |
General civil drainage, clean/lightly contaminated water |
|
SS-316C |
AISI 316 / 316L |
120 m3/h |
60 m |
Chemical wastewater, industrial effluent, mild acids/alkalis |
|
SS-MAR |
Duplex 2205 |
300 m3/h |
90 m |
Seawater desalination, marine aquaculture, high-chloride environments |
|
SS-GRV |
AISI 316 + Grinder |
30 m3/h |
45 m |
Municipal sewage with fibrous solids, heavy-duty wastewater |
Engineering Rule of Thumb: If fluid pH stays between 6.5 and 8.5, AISI 304 is optimal. For pH < 6 or > 10, or chloride levels exceeding 500 ppm, specify AISI 316L or Duplex 2205.
Application Suitability
Municipal Wastewater Treatment: Pumping untreated sewage, grit chambers, and secondary effluent containing corrosive gases and organic acids.
Industrial Process Water: Handling chemical runoff, rinse water in electroplating lines, and acidic drainage in mining operations.
Marine & Seawater Intake: Continuous raw water supply for desalination plants, dock drainage, and offshore platform auxiliary systems.
Agricultural Irrigation: High-head deep well extraction in alkaline soils where standard iron pumps corrode within two seasons.
Manufacturing Quality & Technical Verification
Reliability in sub-surface deployment depends on material purity and seal integrity. Our production line enforces strict verification protocols:
Positive Material Identification (PMI): All raw stainless steel sheets and castings are spectrometer-tested prior to manufacturing to verify exact Nickel, Chromium, and Molybdenum ratios.
Precision Welding: Laser cutting and TIG automated welding under Argon shielding ensure smooth internal seams, eliminating crevice corrosion zones and minimizing hydraulic friction losses.
Tandem Mechanical Seals: Dual independent mechanical seals (Tungsten Carbide vs. Silicon Carbide) separated by an oil barrier chamber, preventing fluid ingress even during dry-running or abrasive exposure.
Factory Performance Testing: Every assembled unit undergoes a 100% computer-controlled test (validating flow, head, power consumption, and vibration) in accordance with ISO 9906 Grade 2B standards.
Compliance & Certifications: CE certified, ISO 9001:2015 factory quality management, and optional ATEX explosion-proof configurations for hazardous zones.
Supplier Evaluation Guide for B2B Buyers
When auditing manufacturers for long-term supply agreements or OEM partnerships, verify these operational checkpoints:
Material Traceability: Request EN 10204 3.1 Mill Test Certificates for all pressure-retaining pump components.
Hydraulic Testing Infrastructure: Ensure the factory operates an open-test water tank capable of handling verification testing up to your required power scale.
Lead Times: Standard production runs require 25 to 35 days. Custom motor windings (e.g., non-standard voltages or tropicalized insulation) add approximately 7 days.
After-Sales Spares: Confirm availability of local or air-express dispatched wearing parts (mechanical seals, bearings, impellers) within a 48-hour window.
Procurement Decision & RFQ Guidelines
To streamline your formal proposal or sample request, please provide the following technical criteria in your RFQ:
Fluid Profile: Specific gravity, exact pH level, solid content (particle size and concentration percentage), and operating temperature.
Duty Point: Required flow rate (Q) at the specified total dynamic head (H).
Electrical Specifications: Voltage, frequency, and phase available on-site (e.g., 460V, 60Hz, 3-phase).
Installation Configuration: Portable wet pit, guide rail auto-coupling system, or dry pit installation.
Commercial Terms: Target delivery port (Incoterms 2020: FOB, CIF, or DDP) and anticipated annual volume.
Frequently Asked Questions
Q: What is the primary operational difference between AISI 304 and AISI 316 stainless steel pumps?
A: AISI 304 contains 18% Chromium and 8% Nickel, ideal for neutral water, clean industrial fluids, and standard municipal sewage. AISI 316 adds 2% to 3% Molybdenum, providing superior resistance to pitting and crevice corrosion caused by chlorides, seawater, and acidic industrial effluents (pH 4–10).
Q: Can these pumps handle liquids containing abrasive solid particles?
A: Standard enclosed impeller models handle suspended solids up to 10 mm with a concentration under 2% by weight. For abrasive slurries containing sand or heavy grit, specify our semi-open impeller configuration paired with hardened Silicon Carbide mechanical seals to minimize abrasive wear.
Q: What protection mechanisms are integrated into the motor winding?
A: Motors rated above 3 kW include embedded PTC thermistors (130°C or 150°C) in the stator windings to prevent thermal overload. Additionally, an internal moisture sensor in the oil chamber triggers an alarm if seal leakage occurs, preventing motor burnout.
Q: Are ATEX-certified explosion-proof versions available for hazardous environments?
A: Yes. For explosive atmospheres containing flammable gases or volatile chemical vapors (Zone 1 or Zone 2), we supply ATEX-certified (Ex d IIB T4) flameproof motor configurations with spark-resistant bronze or stainless steel wear rings.
Q: What is the standard warranty period and after-sales support policy?
A: We provide a 12-month standard warranty from the date of bill of lading or 18 months from factory dispatch, whichever occurs first, covering manufacturing and material defects. Replacement spare parts and remote engineering diagnostics are provided within 24 hours of notification.
Q: What is the typical lead time for standard models versus custom OEM orders?
A: Standard catalog configurations (AISI 304/316, 380V/50Hz or 460V/60Hz) ship within 15 to 25 days. Custom OEM pumps requiring unique hydraulic profiles, special flange drillings (ANSI/DIN/JIS), or specific coating systems require 35 to 45 days.
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