Fixed-Speed Simplicity, Full Stainless Steel Construction — Built for Clean Water Applications That Demand Hygiene
When your water system runs at a steady duty point and does not need the complexity of variable frequency control, the HL Standard horizontal multistage pump delivers clean, efficient performance at the right price. Every component that contacts your water is manufactured from AISI 304 stainless steel, ensuring zero secondary contamination and long service life in domestic and light commercial applications.
Available in six frame sizes from HL2 to HL20, the HL Standard covers flow rates from 0 to 28 m³/h and heads from 5 to 65 m. With both single-phase 220V and three-phase 380V motor options, it adapts to virtually any power supply. The compact horizontal base plate footprint and low-vibration design make installation straightforward in utility rooms, garages, and basement mechanical spaces.
Technical Specifications
| Parameter | HL Standard Value |
|---|---|
| Flow Rate (Q) | 0 – 28 m³/h |
| Head (H) | 5 – 65 m |
| Frame Sizes | HL2, HL4, HL8, HL12, HL16, HL20 |
| Working Pressure | 10 bar (1.0 MPa) |
| Medium Temperature | 0°C to +90°C |
| Pump Body Material | AISI 304 Stainless Steel |
| Impeller Material | AISI 304 Stainless Steel |
| Guide Vanes | AISI 304 Stainless Steel |
| Mechanical Seal | Silicon carbide / graphite |
| Base Plate | Q235 steel |
| Motor Protection | IPX4 |
| Insulation Class | F |
| Voltage Options | Single-phase 220V / Three-phase 380V |
| pH Range | 6.5 – 8.5 |
| Max Chlorine | 200 ppm (free chlorine < 1 ppm) |
For complete performance curves, dimensional drawings, and motor power tables for all six frame sizes, contact our engineering team for a detailed selection proposal.
All-304 Stainless Steel for Clean Water Hygiene
The HL Standard horizontal multistage pump is designed for applications where water quality is non-negotiable. Every over-current component — pump body, impeller, diffuser, and seal chamber — is manufactured from AISI 304 stainless steel. This means:
- No iron rust contamination — unlike cast iron pumps that can leach iron particles into the water stream over time
- No galvanic corrosion — all wetted parts share the same material, eliminating electrochemical degradation
- No coating degradation — stainless steel does not rely on paint or epoxy coatings that can chip, flake, or delaminate in hot water applications
For villa domestic water supply, drinking water boosting, and clean water circulation systems, this all-stainless construction ensures that the water leaving the pump is as clean as when it entered.
Horizontal Base Plate Mount — Stable, Low-Vibration Installation
Unlike vertical multistage pumps that hang from the pipe, the HL Standard sits on a rigid base plate with the pump and motor aligned on a common horizontal axis. This configuration provides several practical advantages:
- Low vibration transmission — the base plate absorbs pump dynamics, reducing noise and vibration transferred to building structures
- Easy maintenance access — all service points — mechanical seal, impeller stack, motor — are readily accessible from the sides and top of the unit
- Compact footprint — the horizontal layout requires less vertical clearance than vertical configurations, making it ideal for low-headroom installations
- Straightforward piping — horizontal suction and discharge connections simplify pipe routing and reduce the number of fittings required
The pump requires no special foundation. A flat, level surface is sufficient for most residential and light commercial installations.
Frame Size Selection Guide
Choosing the right HL frame size depends on your required flow rate and head. The six sizes cover the full operating range:
| Frame Size | Approx. Max Flow | Approx. Max Head | Typical Application |
|---|---|---|---|
| HL2 | 3 m³/h | 65 m | Single-tap boosting, small villa |
| HL4 | 6 m³/h | 55 m | Villa supply, small circulation |
| HL8 | 12 m³/h | 48 m | Multi-bathroom villa, small building |
| HL12 | 18 m³/h | 40 m | Apartment building, commercial |
| HL16 | 24 m³/h | 32 m | Mid-rise building, HVAC circulation |
| HL20 | 28 m³/h | 25 m | High-flow circulation, district supply |
For systems that require both flow and head simultaneously, our engineering team can perform a detailed duty-point analysis to recommend the optimal model and number of stages.
Applications
Constant-Duty Water Transfer
Where the operating point is steady and predictable — filling tanks, transferring water between reservoirs, maintaining circulation at a fixed rate — the HL Standard fixed-speed pump is the most cost-effective choice. No VFD premium, no control complexity, just reliable, efficient pumping at the duty point you need.
Villa Domestic Boosting
The HL Standard is ideally suited for single-family homes and villas requiring consistent water pressure. The single-phase 220V option makes it compatible with standard residential electrical supply. The quiet operation ensures no disturbance to occupants, and the compact horizontal footprint fits easily in garage utility corners or basement mechanical rooms.
Simple Circulation Systems
For hot water recirculation loops, solar thermal systems, and chilled water circulation where the system runs at a near-constant duty, the HL Standard delivers dependable performance without the added cost and complexity of a variable frequency drive. The 304 stainless steel wetted parts handle the elevated temperatures and occasional chlorinated water found in these systems.
Frequently Asked Questions
What is the difference between the HL horizontal multistage pump and the HK(L) vertical multistage pump?
The HL is a horizontal configuration with a working pressure rating of 10 bar (1.0 MPa), designed primarily for domestic and light commercial clean water applications. The HK(L) is a vertical configuration with a higher 16 bar (1.6 MPa) pressure rating and is suited for a wider range of industrial applications including water treatment and boiler feed. For most villa and residential applications, the HL provides the right balance of performance, cost, and simplicity.
What is the maximum operating temperature for the HL Standard pump?
The HL Standard is rated for continuous operation at fluid temperatures up to 90°C. For hot water circulation applications requiring temperatures above 90°C, consider the HB hot water circulation variant, which is rated for continuous operation up to 100°C with fluoro-rubber seals.
What are the installation requirements for the HL horizontal multistage pump?
The HL Standard requires a flat, level surface for base plate mounting. Piping connections should include isolation valves on both suction and discharge, a pressure gauge on the discharge, and a check valve to prevent backflow during shutdown. Electrical connections vary by voltage configuration — single-phase 220V units use a standard three-wire connection, while three-phase 380V units require a four-wire connection with appropriate circuit protection. For detailed installation guidance, contact our engineering team.
Related Products
The HL Standard is part of the HL Horizontal Multistage Pump family. Depending on your application requirements, consider these alternatives:
- Need automatic constant-pressure control for variable demand? The HLE VFD Constant Pressure Pump adds a built-in variable frequency drive with PID control, maintaining steady pressure regardless of how many taps are in use.
- Installing outdoors without a shelter? The HLES Rain-Proof Pump encloses the VFD pump in a stainless steel weatherproof cabinet, providing rain, dust, and theft protection for outdoor installations.
Request a Quote
Tell us your duty point (flow and head), fluid type, and installation environment. Our engineering team will recommend the optimal HL Standard model and deliver a competitive quotation — typically within 24 hours.
