The HK(L) standard vertical multistage water pump delivers reliable, energy-efficient performance for a wide range of industrial and commercial fluid transfer applications. Built around a premium IE3-rated YE3 motor and an all-304-stainless-steel hydraulic chamber, this pump series covers flows from 0.4 to 85 m³/h with heads up to 245 m — making it one of the most versatile vertical multistage centrifugal pumps on the market.
Manufactured in-house with strict ISO 9001 quality control, Hongjiu’s HK(L) series is available factory-direct at competitive pricing with no distributor markup. Every unit is hydrostatically tested before shipment, ensuring leak-free operation from day one.
Core Advantages
IE3 Premium Efficiency Motor — The YE3 motor exceeds China’s Grade 3 energy efficiency standard (equivalent to IE3/IE4 under IEC 60034-30), reducing electricity consumption by 15-25% compared with older Y2-series motors. Lower operating costs mean a faster return on investment.
All-Stainless-Steel Construction — The impeller, diffuser, and pump casing are precision-cast from SUS304 stainless steel. This provides excellent corrosion resistance and makes the pump compatible with over 50 chemical media — including mild acids, alkalis, and treated wastewater — without requiring special alloy upgrades.
Five Connection Types — Whether your piping runs vertically (flanged or threaded), horizontally (in-line), or through a tank wall ( immersion), the HK(L) series offers five distinct connection configurations to minimize installation complexity:
| Connection Code | Type | Typical Use |
|---|---|---|
| F | Flanged, vertical inlet/outlet | General industrial piping |
| N | Threaded, vertical inlet/outlet | Small-diameter residential/commercial |
| T | Flanged, horizontal in-line | Space-constrained horizontal runs |
| K | Threaded, horizontal in-line | Compact horizontal installations |
| L | Immersion / tank-mount | Direct sump or tank installation |
Frame Sizes and Performance Range
The HK(L) standard series spans 11 frame sizes — HK(L)1 through HK(L)120 — covering the full performance envelope. The table below summarizes the key performance parameters.
Technical Specifications
| Parameter | Specification |
|---|---|
| Flow rate (Q) | 0.4 – 85 m³/h |
| Head (H) | Up to 245 m |
| Working pressure | Up to 2.5 MPa (25 bar) |
| Medium temperature | -15 °C to +120 °C (standard) |
| Motor efficiency class | IE3 (YE3) |
| Motor speed | 2-pole: 2900 rpm / 4-pole: 1450 rpm |
| Voltage | Single-phase 220 V / Three-phase 380 V, 50 Hz |
| Starting method | Direct-on-line (DOL) |
| Hydraulic material | SUS304 stainless steel |
| Mechanical seal | Silicon carbide / graphite (standard) |
| Connection types | F, N, T, K, L |
| Number of stages | 1 – 22 (varies by frame size) |
| Protection class | IP55 |
| Insulation class | F |
Applications
The HK(L) vertical multistage water pump is engineered for continuous-duty scenarios where consistent flow and head are required:
- Boiler Feed — Delivers pressurized feedwater to steam boilers up to 2.5 MPa, with reliable mechanical sealing for hot-water service up to 120 °C.
- Water Treatment & Filtration — Handles clean or mildly contaminated water through RO, UF, and multimedia filter systems with minimal pressure pulsation.
- Constant-Duty Water Transfer — Municipal booster stations, industrial cooling circuits, and agricultural irrigation mainlines that operate at fixed speed around the clock.
- Fire Protection — Listed models meet fire-pump standby requirements for sprinkler and hydrant systems when paired with the appropriate controller.
- HVAC Chilled/Hot Water — Circulates water in central air-conditioning and heating systems with low noise and minimal vibration.
Frequently Asked Questions
What is the difference between HK and HKL models?
HK and HKL share identical hydraulic components and performance curves. The difference lies in the motor: HK uses a standard single-speed motor, while HKL uses a long-shaft extended-motor configuration designed for deep-tank immersion or where the pump body must sit below the motor. Choose HKL when your installation requires a longer shaft reach.
Is single-phase 220 V available?
Yes. Frame sizes HK(L)1 through HK(L)16 are available with single-phase 220 V, 50 Hz motors for residential and light-commercial installations where three-phase power is not accessible.
What is the maximum allowable temperature?
The standard configuration is rated for continuous operation at media temperatures up to 120 °C. For applications exceeding this range, consult our engineering team for high-temperature seal and bearing upgrades.
Related Products
- HK(L)E Variable Speed Multistage Pump — Built-in VFD for automatic constant-pressure control and 20-40% energy savings.
- HK(L)YE IE5 Permanent Magnet Pump — Ultra-efficient PM motor with 95% efficiency for green building projects.
- HK(L) Vertical Multistage Pump — Full series overview and selection guide.
