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Grundfos

DenmarkPumps & Compressors

Grundfos is a Danish pump manufacturer founded in 1945, specializing in circulation, pressure, and transfer pump systems for industrial, commercial, and residential applications. The company operates globally with manufacturing and distribution facilities across multiple continents, serving sectors including HVAC, oil supply, building services, and process industries. The SI-30 condensate pump addresses air-conditioning installations up to 20 kW, rated for 20 l/h maximum flow with automatic thermal protection at 115 °C, suitable for continuous operation in cooling circuits. Oil supply systems include the GPS130NW pressure and suction units for burner applications, complemented by volumetric meters (VZO15, VZO20) that provide flow measurement and pulse-output capability for monitoring and control integration. The SUNP0400 charging and washing pump delivers variable flow (5–35 L/min) at 4.0 bar maximum pressure, powered by a 0.37 kW motor with 25-liter reservoir capacity, designed for descaling and cleaning maintenance tasks on industrial equipment. Grundfos products are constructed to operate within defined temperature and pressure envelopes, with safety interlocks and thermal cutouts typical of equipment serving critical building systems. Technical documentation, dimensional drawings, and electrical connection details are provided with each SKU to facilitate integration into existing piping, electrical, and control architectures.

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About Grundfos

Grundfos is a Danish pump manufacturer founded in 1945, specializing in circulation, pressure, and transfer pump systems for industrial, commercial, and residential applications. The company operates globally with manufacturing and distribution facilities across multiple continents, serving sectors including HVAC, oil supply, building services, and process industries. The SI-30 condensate pump addresses air-conditioning installations up to 20 kW, rated for 20 l/h maximum flow with automatic thermal protection at 115 °C, suitable for continuous operation in cooling circuits. Oil supply systems include the GPS130NW pressure and suction units for burner applications, complemented by volumetric meters (VZO15, VZO20) that provide flow measurement and pulse-output capability for monitoring and control integration. The SUNP0400 charging and washing pump delivers variable flow (5–35 L/min) at 4.0 bar maximum pressure, powered by a 0.37 kW motor with 25-liter reservoir capacity, designed for descaling and cleaning maintenance tasks on industrial equipment. Grundfos products are constructed to operate within defined temperature and pressure envelopes, with safety interlocks and thermal cutouts typical of equipment serving critical building systems. Technical documentation, dimensional drawings, and electrical connection details are provided with each SKU to facilitate integration into existing piping, electrical, and control architectures.

Common Applications

  • HVAC — Grundfos SI-30 condensate pump for air-conditioning installations up to 20 kW capacity
  • Industrial heating — GPS130NW pressure and suction units in oil burner fuel-supply circuits
  • Equipment maintenance — SUNP0400 charging and washing pump for descaling boilers and industrial equipment
  • Fuel accounting — VZO15 and VZO20 oil meters for flow measurement and consumption monitoring in oil-supply systems
  • Closed-loop heating systems — Double-acting expansion tank pump for pressure regulation and thermal stability
  • Building services — Grundfos pump range supporting HVAC, domestic heating, and pressure-boosting applications
Origin: Manufactured in Denmark

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Frequently asked questions

Common questions about Grundfos from 3G Electric.

What is the maximum operating capacity of the Grundfos SI-30 condensate pump, and what thermal protection does it offer?

The SI-30 is rated for air-conditioning systems up to 20 kW with a maximum flow rate of 20 l/h. It includes automatic thermal protection that triggers at 115 °C, with automatic restart capability. The pump operates continuously and accommodates condensate temperatures up to 35 °C. The electrical safety contact is rated NF 8 A resistive at 250V.

What are the specifications of the Grundfos GPS130NW pressure and suction units available?

The GPS130NW is available as both a pressure unit (for discharge-side installation) and a suction unit (for intake-side installation) in oil supply circuits, typically for industrial burners. These are modular components designed to integrate into fuel-handling systems. Exact pressure ratings, flow capacities, and connection ports are detailed in the product documentation available upon request.

Can the Grundfos SUNP0400 cleaning pump be used for general-purpose descaling, and what reservoir capacity does it have?

The SUNP0400 is specifically designed for charging and washing applications in cleaning and descaling work. It delivers 5–35 L/min at a maximum pressure of 4.0 bar, powered by a 0.37 kW motor. It includes a 25-liter reservoir to support sustained operation on medium-scale maintenance tasks. Fluid compatibility depends on the application; consult technical documentation for chemical compatibility.

What is the purpose of the Grundfos VZO oil meters, and do they support remote monitoring?

The VZO15 and VZO20 are volumetric oil meters used in fuel-supply systems to measure actual flow rates for billing, consumption tracking, and system diagnostics. The VZO20 variant includes pulse output capability, allowing connection to building management systems, flow totalizers, or programmable controllers for automated monitoring and alarm integration.

What is the double-acting expansion tank pump used for in Grundfos systems?

The double-acting pump for expansion tanks is used in closed-loop heating or cooling circuits to manage pressure fluctuations and maintain system stability. It helps maintain hydrostatic pressure and compensates for thermal expansion, reducing stress on piping and extending equipment life in high-temperature or high-pressure applications.

How do you support Grundfos equipment after purchase?

We maintain stock of Grundfos units for same-day or next-day dispatch and provides technical documentation with each SKU. For application guidance, dimensional specifications, spare-parts cross-references, or integration support, contact the sales team directly. Warranty and service terms follow Grundfos standard conditions.