The LW Series Vertical Pump is a centrifugal pump with direct-coupled compact structure and coaxial same-diameter inlet/outlet, enabling direct in-line installation without pipeline modification, featuring optimized hydraulic model and high-precision dynamic balancing for stable transfer of clean water and similar media.
Resolves critical challenges of conventional pumps: extended installation cycles due to foundation/pipeline retrofitting, vibration/noise exceedance, corrosion/wear of wetted parts and seal leakage, and elevated energy consumption under equivalent operating conditions.
Suitable for high-rise water supply, HVAC circulation, industrial cooling systems, and district heating applications requiring coaxial in-line installation, low vibration/noise operation, zero-leakage performance, and reliable long-cycle running.
Extended Service Life: SiC/tungsten carbide dual mechanical seals + high-strength cast iron/stainless steel wetted parts resist wear, corrosion & cavitation. Design lifespan ≥12 years—over 35% longer than standard horizontal centrifugal pumps.
Significant Energy Savings: Optimized hydraulic model + IE3 high-efficiency motor matching achieve ≥75% 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: Vertical direct-coupled design eliminates coupling guard & heavy baseplate. Overall weight reduced by ~20% for equivalent flow/head ratings, lowering floor load & lifting complexity.
Faster Installation: Coaxial same-diameter ports + pre-aligned flanges enable zero-cutting pipe connection on-site. Standard units reach commissioning readiness within 1.5 hours from unboxing, compressing installation cycle by 45%.
Building Water Supply: Zone boosting for high-rise buildings, residential domestic water, fire pressure stabilization, constant pressure supply ensuring stable terminal water pressure, supporting flexible pressure 1.0/1.6 MPa configuration.
HVAC Circulation: Central AC chilled/hot water loops, boiler water circulation, underfloor heating systems, low-noise operation (≤65 dB(A)), 15%–30% energy savings with VFD control, adapting to variable-flow conditions.
Industrial Process Transport: Clean liquid delivery for chemical/pharmaceutical/food & beverage industries. Optional 304/316 stainless steel wetted parts, compliant with GMP hygiene standards & food-grade certifications.
Cooling Water Systems: Cooling tower circulation, industrial equipment cooling water boosting, corrosion-resistant design + high-temp variant optional (≤120℃), adapted for long-term continuous operation.
Media Compatibility: Clean water or liquids with similar physicochemical properties. Free of solids or trace suspended solids (≤0.1%). pH 6–10. Temperature: -15℃ to +120℃ (5℉ to 248℉).
Media: Clean water or similar liquids | Solids ≤0.1% vol, no long fibers | pH 6–10 (cast iron) Temp: Media -15°C to +120°C (standard/high-temp optional) | Ambient ≤40°C | Humidity ≤95% non-condensing System: Max pressure 1.0/1.6 MPa optional | Max suction lift ≤8m (priming required) | Install: Vertical inline, same-diameter coaxial ports Electrical: Power 3-phase 380V±10%/50Hz customizable | Protection: Motor IP54/IP55, cabinet IP54 | Insulation: Class F Note: Special conditions (high temp/corrosion/high particles/high altitude)? Consult before selection. Custom solutions available.
National Standard Compliance: Strictly manufactured per GB/T 5657-2013 & JB/T 5294-2011. Hydraulic performance & mechanical safety 100% compliant. Third-party full performance curve test reports available.
Motor Energy Efficiency Certification: Standard IE3 ultra-efficient motors comply with GB 18613-2020 (IE3 grade). CE/UL energy certifications available for global green-equipment access.
Food Hygiene Compliance: 304/316 stainless steel wetted parts passed drinking water safety evaluation & FDA food-contact material certification, compliant with GB 4806.9-2016, suitable for food/pharmaceutical clean conditions.
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 3–400 m³/h, head 10–150 m. Standard cast iron/304 stainless steel + IP55 motors. Technical confirmation & sample prototyping within 72 hours.
Deep Customization Capabilities:
Material Upgrade: Wetted parts optional in 316/duplex 2205 stainless steel or PTFE-lined for high-chloride, mild acid/alkali, or ultra-pure media conditions.
Seals & Motors: Optional high-temp mechanical seals (up to 120℃), explosion-proof motors (Ex d IIB T4), IE4 ultra-efficiency or VFD-dedicated drives.
Structural Adaptation: Flange standard switching (GB/ANSI/DIN/JIS), inlet/outlet orientation adjustment, 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 vertically on solid foundation/bracket. Level using adjustable feet. Ensure shaft verticality ≤0.5 mm/m to prevent seal failure from misalignment wear.
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.Open top vent valve to fill pump with media. Lock valve after confirming no air remains. Jog test to verify rotation (clockwise from motor end).
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 “LW Series Vertical Inline Centrifugal Pump Installation & Maintenance Manual” (PDF/English version) for complete dimensional drawings, flange specs, and commissioning logs.
Q1: How does back-pull-out design enable “maintenance without disconnecting pipes”?
After loosening middle casing bolts, motor + bracket + rotor assembly slides rearward as a unit. Impeller/bearings/seals are fully exposed without disturbing inlet/outlet connections.
Q2: How do dual mechanical seals guarantee leakage <0.01 mL/h?
SiC/tungsten carbide mating faces precision ≤0.001 mm + dual-seal series layout + oil-chamber lubrication/cooling. Combined with spring constant-pressure compensation, tested leakage rate <0.01 mL/h, meeting clean workshop requirements.
Q3: How does vertical coaxial direct-coupling prevent vibration from pipe stress?
Direct coupling eliminates coupling alignment errors. Factory laser-aligned. Rigid connection is prohibited on-site. Flexible joints & independent pipe supports must absorb displacement.
❓ Q4: How do IE3 motor + hydraulic model achieve 15%–25% energy savings?
→ CFD diffuser passages reduce hydraulic losses + IE3 motor reduces copper/iron losses. Combined with VFD PID closed-loop control, flow matches demand exactly, eliminating throttling waste.
Q5: What customizations are needed for high-temperature variant (≤120℃)?
Standard type suits -15℃ 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.
