The Stainless Steel Centrifugal Pump features a direct-coupled structure, SUS304/316L stainless steel wetted parts, and silicon carbide double-end mechanical seals, integrated with an optimized hydraulic model and IE3 high-efficiency motor for stable transfer of corrosive, particle-containing, and high-temperature media.
Resolves four critical operational challenges of conventional cast iron pumps in chemical/food/pharmaceutical applications: corrosion-induced leakage, high contamination risk to process media, frequent downtime for maintenance, and excessive energy consumption.
Suitable for chemical acid/alkali transfer, food/pharmaceutical clean fluid handling, water treatment boosting, and HVAC circulation requiring transfer of liquids with pH 2-12, solid particles ≤2mm, and media temperatures from -20℃ to +120℃, with compliance to GMP hygiene standards and food-grade certifications.
Extended Service Life: SUS304/316L stainless steel wetted parts + silicon carbide dual mechanical seals resist corrosion, wear & cavitation. Design lifespan ≥15 years—over 50% longer than standard cast-iron centrifugal pumps.
Significant Energy Savings: Optimized hydraulic model + IE3 high-efficiency motor matching achieve ≥78% rated efficiency. Combined with VFD on-demand regulation, annual electricity costs drop by 15%–25%.
Lower Maintenance Costs: Back-pull-out structure + integrated drain/pressure ports enables seal/impeller inspection without disconnecting inlet/outlet piping. Single technician completes maintenance within 1 hour, reducing labor costs by 50%.
Lightweight & Compact Design: Direct-coupled structure eliminates coupling guard & heavy baseplate. Overall weight reduced by ~25% for equivalent flow/head ratings, lowering floor load & lifting complexity.
Faster Installation: Pre-aligned flanges + pre-drilled integral base enable zero-cutting pipe connection on-site. Standard units reach commissioning readiness within 1.5 hours from unboxing, compressing installation cycle by 45%.
Chemical Process Transport: Acid/alkali solutions, organic solvents, chemical reagents transport. SUS304/316L stainless steel resists corrosion, adapting to complex chemical conditions & wide pH range 2–12.
Food & Pharmaceutical Industry: Beverage, dairy, pharmaceutical liquid transport. SUS316L material complies with GMP hygiene standards, easy to clean with zero residue, meeting food hygiene certification requirements.
Water Treatment Systems: Raw water boosting, circulating water transport, sewage treatment. Wear-resistant design + high-efficiency hydraulic model adapts to long-term continuous operation & media with trace particles (≤2 mm).
HVAC Systems: Cooling water circulation, chilled water transport, boiler make-up. Low-noise operation (≤70 dB(A)) + VFD energy savings significantly reduce system operating energy consumption.
Media Compatibility: Clean water/corrosive liquids/food & beverage/pharmaceutical liquids. Solid content ≤5% (vol), particle size ≤2 mm, pH 3–11 (304)/2–12 (316L), temperature -20℃ to +120℃ (-4℉ to 248℉).
 | NO. | Component |
| 1 | Straight Grease Nipple | |
| 2 | Hex Bolt | |
| 3 | Hex Bolt | |
| 4 | Spring Washer | |
| 5 | Flat Washer | |
| 6 | Lip Seal | |
| 7 | Gasket | |
| 8 | Bearing Bracket | |
| 9 | Parallel Key Type A (Coupling) | |
| 10 | Ball Bearing | |
| 11 | Pump Shaft | |
| 12 | Parallel Key Type A (Impeller) | |
| 13 | Bearing Housing | |
| 14 | Hex Nut Type A | |
| 15 | Slinger Ring | |
| 16 | Casing Cover | |
| 17 | Spring Seat | |
| 18 | Mechanical Seal | |
| 19 | O-Ring | |
| 20 | Impeller | |
| 21 | Flat Washer | |
| 22 | Stud Bolt Type A | |
| 23 | Spring Washer | |
| 24 | Cap Nut | |
| 25 | Wear Ring | |
| 26 | Casing / Volute | |
| 27 | Pipe Plug |
Media Requirements • Media: Clean water / corrosive liquids / food & beverage / pharmaceutical liquids • Solids: ≤5% vol, particle size ≤2 mm | pH: 3–11 (SUS304); 2–12 (SUS316L)
Temperature Limits • Media: -20°C to +120°C (-4°F to 248°F); standard/high-temp optional • Ambient: ≤40°C (≤104°F) | Humidity: ≤95% (non-condensing)
System Limits • Flow: 1.5–400 m³/h (24–6670 GPM) | Head: 5–125 m (16–410 ft); single/multi-stage optional • Max. pressure: 1.0 / 1.6 MPa (145 / 232 psi)
Electrical Limits • Power: 3-phase 380V ±10% / 50Hz (customizable) • Protection: Motor IP54/IP55 | Cabinet IP54 | Insulation: Class F
Note: Special conditions (strong corrosion / high particles / high altitude / explosion-proof)? Consult before selection. Custom solutions available.
Food Hygiene Compliance: Wetted parts in SUS304/316L food-grade stainless steel, passed drinking water safety evaluation & FDA food-contact material certification, compliant with GB 4806.9-2016, eliminating media contamination risks.
Chemical Corrosion Certification: Material corrosion resistance passed ASTM G48 pitting test & NACE MR0175 stress corrosion cracking certification, adapting to wide pH range 2–12 corrosive media.
International Quality System: ISO 9001:2015 certified. Core pressure-bearing components evaluated per CE/PED 2014/68/EU, meeting EU/US market entry requirements.
Factory Inspection Standard: Every unit undergoes 1.5× rated pressure hydrostatic test (5-min hold) + ISO 1940 G2.5 dynamic balance calibration + mechanical seal leakage test (<0.01 mL/h), guaranteeing zero-leakage delivery.
Fast Standard Delivery: Covers flow 1.5–400 m³/h, head 5–125 m. Standard SUS304/316L + silicon carbide seals + IE3 motors. Technical confirmation & sample prototyping within 72 hours.
Deep Customization Capabilities:
Material Upgrade: Wetted parts optional in 2205/2507 duplex steel, titanium alloy, or PTFE-lined for strong acids/alkalis, high-chloride, or ultra-pure media conditions.
Seals & Motors: Optional high-temp mechanical seals (up to 150℃), explosion-proof motors (Ex d IIB T4), IE4 ultra-efficiency or VFD-dedicated drives.
Structural Adaptation: Flange standard switching (GB/ANSI/DIN/JIS), reinforced base, pre-installed flexible joints, outdoor rain/soundproof canopy customization.
Intelligent Expansion: Pre-wired interfaces for pressure/temperature/dry-run sensors; supports integration with VFD cabinets, IoT remote monitoring, multi-pump rotation modules.
Please contact us for customization inquiries. Our engineering team delivers process proposals within 48 hours.
Installation Key Points:
1.Mount pump horizontally on solid foundation. Tighten anchor bolts symmetrically. Ensure shaft horizontal deviation ≤0.05 mm/m to prevent premature bearing wear from uneven loading.
2.Connect inlet/outlet with flexible rubber joints. Never transmit pipe stress to pump body. Provide independent supports for inlet/outlet piping.
3.Motor junction box faces outward. Secure cable along pipe wall. Grounding resistance ≤4 Ω. Manually rotate shaft 3 turns to confirm smooth, friction-free rotation.
4.Prime pump & vent air. Jog test to verify rotation (clockwise from motor end). Confirm insulation resistance ≥50 MΩ before operation.
Commissioning Process: Prime & vent → Jog test for direction → No-load run 5 min → Slowly open discharge valve to rated duty → Record current/pressure/vibration/bearing temp data → Acceptance.
Request the “Horizontal Stainless Steel Centrifugal Pump Installation & Maintenance Manual” (PDF/English version) for complete dimensional drawings, flange specs, and commissioning logs.
SUS304 suits pH 3–11, chloride ≤200 mg/L mild corrosion media; 316L contains molybdenum for superior pitting resistance, adapting to pH 2–12, high-chloride, or bromide-containing media. Preferred for food/pharmaceutical applications.
Q2: How do dual mechanical seals achieve leakage rate <0.01 mL/h?
SiC/WC mating faces precision ≤0.001 mm + dual-seal series layout + oil-chamber lubrication/cooling. Tested leakage rate <0.01 mL/h, meeting zero-leakage requirements & clean workshop standards.
Q3: How does back-pull-out design enable “maintenance without disconnecting pipes”?
After loosening rear cover bolts, motor + bracket + rotor assembly can be pulled out rearward as a unit. Seals/bearings/impellers fully exposed for maintenance without disturbing inlet/outlet pipes.
Q4: How to protect seals with media containing trace particles (≤2 mm)?
Standard SiC seals suit clean water. Specify during ordering for particulate media. We upgrade to wear-resistant dual mechanical seals (with flush plan Plan 53B) & recommend upstream filter installation (precision ≤0.5 mm).
Q5: What customizations are needed for high-temperature variant (>80℃)?
Standard type suits -20℃ to +80℃. For >80℃: ① High-temp mechanical seals (FKM O-rings + SiC mating faces); ② Pump body insulation jacket; ③ Enhanced motor cooling structure.
