A horizontal multistage pump is a type of centrifugal pump that is designed to generate high-pressure fluid flow. It consists of multiple impellers mounted on a common shaft, with each impeller increasing the pressure of the fluid as it passes through. The impellers are typically arranged in a horizontal configuration, with the inlet and outlet ports located on opposite ends of the pump housing.

Horizontal multistage pumps are commonly used in a variety of industrial and commercial applications, including water supply and distribution, irrigation, pressure boosting, and HVAC systems. They are particularly well-suited for applications that require high pressure, high flow rates, or both.

Some of the key features and benefits of horizontal multistage pumps include:

1. High efficiency: Horizontal multistage pumps are designed to be highly efficient, with low energy consumption and minimal maintenance requirements.
2. Reliable performance: These pumps are built to withstand harsh operating conditions, with durable materials and construction methods that ensure reliable performance over time.
3. Easy installation: Horizontal multistage pumps are generally easy to install, with simple connections and clear instructions.
4. Compact design: The horizontal configuration of these pumps makes them more compact and space-efficient than some other types of pumps, which can be an advantage in applications with limited space.
5. Versatility: Horizontal multistage pumps are suitable for a wide range of applications and can be customized to meet specific requirements.

Overall, horizontal multistage pumps are a versatile and reliable choice for many industrial and commercial applications that require high-pressure fluid flow.

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Wilo-Economy MHI
Design
Non-self-priming multistage pump
Equipment/function

• Stainless steel in monobloc design
• Threaded connection
• Single-phase or three-phase AC motor
• Single-phase AC motor equipped with built-in thermal motor protection (with automatic restart)

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Materials

• Impellers, stage chambers and pump housing made of 1.4301/1.4404 stainless steel
• Shaft 1.43.01 or 1.4404 stainless steel
• Seal EPDM (EP 851) / FKM (Viton)
• Mechanical seal
• EPDM version: B-carbon/silicon carbide FKM version: Silicon carbide/B-carbon Bearing tungsten carbide/aluminium oxide Pump base aluminium

Special features/product advantages

• IE3 IEC three-phase AC motor (≥ 0.75 kW)
• All parts that come in contact with the fluid are made of stainless steel 1.4301 (AISI 304) or 1.4404 (AISI 316L)
• Space-saving, compact design
• Drinking water approval (ACS, KTW, WRAS) for all components in contact with the fluid (EPDM version)

Technical data

• Mains connection 1~230 V (±10 %), 50 Hz or optionally 220 V (±10 %), 60 Hz
• Mains connection: 3~230 V (±10 %), 50 Hz (Δ) or optionally
• 265 V (±10 %), 60 Hz (Δ), 400 V (±10 %), 50 Hz (Y) or optionally 460 V (±10 %), 60 Hz (Y);
• identical motor: 3~220 V (±10 %), 60 Hz (Δ), 380 V (±10 %), 60 Hz (Y);
• Fluid temperature of -15 to +110 °C
• Max. operating pressure 10 bar
• Max. intake pressure of 6 bar
• Protection class 1~: IPX4; 3~: IP54
• Nominal diameters of pipe connections: Rp 1, Rp 1 1⁄4 or Rp 1 1⁄2, depending on type