Overview
The LW Series vertical pipeline centrifugal pump features an inline architecture with coaxial suction and discharge ports of identical diameter, allowing direct series connection into existing pipe networks without additional foundation casting or pipeline modification. This design significantly reduces on-site installation time and saves valuable plant room space.
Built on an optimized hydraulic model with high-precision dynamic balancing, the unit operates with vibration and noise levels below industry benchmarks. Flow-pass components receive anti-corrosion and wear-resistant treatment, designed for continuous clean water and physically-chemically similar media service. Paired with high-performance mechanical seals, the pump delivers reliable long-term operation with minimal leakage.
The series serves high-rise building water supply, HVAC water circulation, industrial cooling systems, and district heating applications. Its vertical coaxial layout combined with an IE3 efficiency motor reduces energy consumption compared to traditional horizontal pump configurations at equivalent flow and head conditions, making it a practical choice for space-constrained installations with whole-life cost optimization goals.
Key Features
- Inline Pipeline Integration – Identical-diameter coaxial inlet and outlet ports enable zero-cutting direct pipe connection. Standard units go from unpacking to commissioning readiness in approximately 1.5 hours, reducing installation time by an estimated 45% compared to conventional horizontal pump sets.
- Extended Service Life – Silicon carbide/tungsten carbide double mechanical seals combined with high-strength cast iron or stainless steel flow-pass components provide wear, corrosion, and cavitation resistance. Designed service life reaches approximately 12 years, roughly 35% longer than standard horizontal centrifugal pumps.
- Energy Efficiency – Optimized hydraulic model paired with IE3 high-efficiency motors achieves rated-condition efficiency at or above 75%. With variable frequency on-demand regulation, annual operating electricity costs can reduce by an estimated 15% to 25%.
- Simplified Maintenance – Back-pull-out structure with integrated drain and pressure-tap ports allows seal and impeller inspection without dismantling inlet/outlet piping. Routine maintenance can typically be completed by a single technician within one hour, reducing labor costs.
- Compact Lightweight Design – Vertical direct-drive configuration eliminates coupling guards and heavy baseplates. At equivalent flow and head ratings, net unit weight decreases by approximately 20%, reducing plant room load-bearing requirements and lifting complexity.
Technical Specifications
| Parameter | Range |
|---|---|
| Flow Rate | 7 – 800 m³/h |
| Head | 5 – 60 m |
| Motor Power | 0.75 – 90 kW |
| Rotational Speed | 1450 / 2900 r/min |
| Outlet Diameter | DN50 – DN300 |
| Max Working Pressure | 1.0 / 1.6 MPa |
| Media Temperature | -15°C to +120°C |
| Media Type | Clean water or physically-chemically similar liquids |
| Solid Content | ≤ 0.1% |
| pH Range | 6 – 10 |
| Max Suction Lift | ≤ 8 m (requires priming) |
Application Scenarios
HVAC Water Circulation
The LW Series integrates directly into central air conditioning chilled and hot water loops, boiler water circulation, and underfloor heating systems. Low-noise operation at or below 65 dB(A) makes it suitable for installations near occupied spaces. Variable frequency compatibility enables 15% to 30% energy savings under variable-flow conditions commonly encountered in seasonal HVAC load changes.
Building Water Supply
High-rise building zoned pressure boosting, residential community water supply, and fire pressure stabilization systems benefit from the pump’s inline configuration. Operating pressure supports 1.0 MPa or 1.6 MPa configurations depending on system requirements, maintaining stable terminal water pressure across varying demand profiles.
Industrial Process Transfer
Clean liquid transfer applications in chemical, pharmaceutical, and food & beverage industries can specify 304 or 316 stainless steel flow-pass components. The design supports GMP hygiene standards and food-grade certification requirements for sanitary process environments.
Cooling Water Systems
Cooling tower circulation and industrial equipment cooling water boosting applications benefit from corrosion-resistant construction and high-temperature options rated up to 120°C, supporting continuous operation in demanding thermal management environments.
Installation Guidelines
Pre-Installation Checks
- Verify foundation flatness at or below 2 mm/m, reserving minimum 400 mm clearance on all sides for maintenance access.
- Confirm media parameters: temperature between -15°C and +120°C, solid content at or below 0.1%, pH between 6 and 10.
- Check maximum working pressure rating (1.0 or 1.6 MPa) matches system design pressure.
Installation Steps
- Mount the pump vertically on a stable foundation or support bracket. Use adjustable feet to level, ensuring pump shaft verticality at or below 0.5 mm/m to prevent uneven seal wear.
- Connect inlet and outlet with flexible rubber joints. Do not transmit pipe stress to the pump body. Provide independent support brackets for inlet and outlet piping.
- Route motor wiring with terminal box facing outward. Secure cable along pipe wall. Ground resistance must be at or below 4 ohms.
- Before first startup, manually rotate the shaft three complete turns to confirm free rotation without friction or binding.
- Open the top vent valve to prime the pump with media. Confirm no air remains in the pump chamber, then tighten securely.
- Jog the motor to verify rotation direction (clockwise when viewed from the motor end).
Commissioning Procedure
Prime and vent the pump → jog to verify rotation direction → run no-load for 5 minutes → gradually open outlet valve to rated condition → record current, pressure, vibration, and bearing temperature rise data → complete acceptance sign-off.
Frequently Asked Questions
What media is the LW Series designed to handle?
The pump is designed for clean water or liquids with similar physical and chemical properties. Maximum solid content should not exceed 0.1%, with pH between 6 and 10 and temperature ranging from -15°C to +120°C.
How does the inline design save installation time?
Identical-diameter coaxial inlet and outlet ports allow direct connection to existing pipelines without cutting, welding, or modifying pipe runs. Combined with the pre-aligned design, standard installations typically reach commissioning readiness within 1.5 hours.
Can the pump operate with a variable frequency drive?
Yes. The LW Series is compatible with VFD control for on-demand flow and pressure regulation. With variable frequency operation, estimated annual energy savings range from 15% to 25% depending on load profile.
What seal types are available?
Standard configuration uses silicon carbide/tungsten carbide double mechanical seals with leakage rates below 0.01 mL/h. The back-pull-out design allows seal replacement without dismantling the connected piping.
What motor efficiency class does the pump use?
The LW Series comes standard with IE3 ultra-high-efficiency motors, complying with GB 18613-2020 energy efficiency standards. CE/UL efficiency certification is available for global market access.
Why Choose Chaodun Pump
Chaodun Pump manufactures the LW Series under relevant domestic design and testing standards, with each unit completing 1.5x rated pressure static testing (5-minute hold), ISO 1940 G2.5 dynamic balance verification, and mechanical seal leakage testing before delivery. Comprehensive dimensional drawings, flange connection specifications, and commissioning record forms are available in the LW Series installation and maintenance manual, provided in both Chinese and English.