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GRUNDFOS CR

Grundfos CR is a series of vertical, multistage centrifugal pumps manufactured by Grundfos, a Danish pump manufacturer founded in 1945 and headquartered in Bjerringbro, Denmark. The CR series is designed for a wide range of industrial applications requiring reliable, high-pressure fluid transfer. These pumps are built with a modular construction, allowing for customization of materials, seals, and motor options to suit specific process conditions. Typical applications include water supply, pressure boosting, industrial washing, boiler feed, and reverse osmosis systems. The CR pump family covers flow rates up to approximately 180 m³/h and heads up to 330 meters, depending on the model and configuration. Pump wetted parts are available in stainless steel (EN 1.4301 or 1.4401) or other alloys, with elastomers such as EPDM, FKM, or NBR depending on fluid compatibility. The CR series is known for its compact footprint, high efficiency, and ease of maintenance, with cartridge shaft seals and plug-in connections that simplify service. Grundfos also offers a range of accessories and connection components, including the standard flanges and flange kits supplied by 3G Electric. These flanges are cast iron with aramid fiber/NBR gaskets, rated to ANSI Class 150, and available in sizes from 2 to 3 inches NPT. They are designed to match specific CR pump models (e.g., CR 10, CR 32) and include bolts and gaskets as specified. 3G Electric stocks multiple SKUs of Grundfos CR standard flanges and flange kits, providing global logistics support for plant engineers and procurement specialists who need to maintain or install CR pump systems. The flanges are compatible with ANSI Class 150 piping systems and are suitable for water, glycol solutions, and other non-aggressive fluids within the pump's operating range. By offering these components individually, 3G Electric enables maintenance teams to replace worn flanges or complete connection sets without purchasing a full pump assembly, reducing downtime and inventory costs. The flanges are manufactured to Grundfos specifications, ensuring proper fit and sealing with the CR pump's discharge and suction ports. For engineers specifying replacement parts, the manufacturer part numbers (e.g., 335021, 559601, 569601) correspond directly to Grundfos catalog listings, simplifying cross-referencing. 3G Electric's catalog includes detailed specifications such as bolt counts, gasket materials, and body material, allowing buyers to verify compatibility with their existing equipment. The flanges are not intended for use with aggressive chemicals or high-temperature fluids beyond the gasket material limits; for such applications, alternative seal materials may be required. Overall, the Grundfos CR series and its associated connection components represent a standardized, widely adopted solution for industrial pumping needs, and 3G Electric's inventory supports global maintenance and retrofit projects.

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About GRUNDFOS CR

Grundfos CR is a series of vertical, multistage centrifugal pumps manufactured by Grundfos, a Danish pump manufacturer founded in 1945 and headquartered in Bjerringbro, Denmark. The CR series is designed for a wide range of industrial applications requiring reliable, high-pressure fluid transfer. These pumps are built with a modular construction, allowing for customization of materials, seals, and motor options to suit specific process conditions. Typical applications include water supply, pressure boosting, industrial washing, boiler feed, and reverse osmosis systems. The CR pump family covers flow rates up to approximately 180 m³/h and heads up to 330 meters, depending on the model and configuration. Pump wetted parts are available in stainless steel (EN 1.4301 or 1.4401) or other alloys, with elastomers such as EPDM, FKM, or NBR depending on fluid compatibility. The CR series is known for its compact footprint, high efficiency, and ease of maintenance, with cartridge shaft seals and plug-in connections that simplify service. Grundfos also offers a range of accessories and connection components, including the standard flanges and flange kits supplied by 3G Electric. These flanges are cast iron with aramid fiber/NBR gaskets, rated to ANSI Class 150, and available in sizes from 2 to 3 inches NPT. They are designed to match specific CR pump models (e.g., CR 10, CR 32) and include bolts and gaskets as specified. 3G Electric stocks multiple SKUs of Grundfos CR standard flanges and flange kits, providing global logistics support for plant engineers and procurement specialists who need to maintain or install CR pump systems. The flanges are compatible with ANSI Class 150 piping systems and are suitable for water, glycol solutions, and other non-aggressive fluids within the pump's operating range. By offering these components individually, 3G Electric enables maintenance teams to replace worn flanges or complete connection sets without purchasing a full pump assembly, reducing downtime and inventory costs. The flanges are manufactured to Grundfos specifications, ensuring proper fit and sealing with the CR pump's discharge and suction ports. For engineers specifying replacement parts, the manufacturer part numbers (e.g., 335021, 559601, 569601) correspond directly to Grundfos catalog listings, simplifying cross-referencing. 3G Electric's catalog includes detailed specifications such as bolt counts, gasket materials, and body material, allowing buyers to verify compatibility with their existing equipment. The flanges are not intended for use with aggressive chemicals or high-temperature fluids beyond the gasket material limits; for such applications, alternative seal materials may be required. Overall, the Grundfos CR series and its associated connection components represent a standardized, widely adopted solution for industrial pumping needs, and 3G Electric's inventory supports global maintenance and retrofit projects.

Common Applications

  • Water pressure boosting — Grundfos CR 10 pump with 2-inch flange set (SKU 856A76) for commercial building water supply
  • Industrial washing systems — Grundfos CR 32 pump with 2.5-inch flange kit (SKU 856A92) for high-pressure cleaning lines
  • Boiler feed water — Grundfos CR pump with 3-inch flange set (SKU 856A93) for steam generation in manufacturing plants
  • Reverse osmosis pretreatment — Grundfos CR multistage pump with ANSI Class 150 flanges for membrane feed
  • Cooling tower circulation — Grundfos CR pump with standard flanges for closed-loop water systems in HVAC

Frequently asked questions

Common questions about GRUNDFOS CR from 3G Electric.

What materials are used in Grundfos CR standard flanges?

The Grundfos CR standard flanges supplied by 3G Electric have a cast iron body material. The gaskets are made from aramid fiber reinforced with NBR (nitrile butadiene rubber). This combination provides good sealing performance for water and non-aggressive fluids within the pump's operating temperature and pressure limits. The bolts included in the flange sets are typically steel, though specific material grades are not listed in the product specifications. For applications involving aggressive chemicals or high temperatures, consult the pump's compatibility chart or consider alternative gasket materials.

Which Grundfos CR pump models are compatible with the flange sets?

The flange sets are designed for specific Grundfos CR pump models. For example, SKU 856A76 (2-inch flange set, part number 335021) is compatible with the CR 10 model. SKU 856A92 (2.5-inch flange kit, part number 559601) is compatible with the CR 32 model. SKU 856A93 (3-inch flange set, part number 569601) does not list a specific compatible model in the provided data, but it is intended for larger CR pumps. Always verify compatibility by cross-referencing the manufacturer part number with your pump's documentation or by contacting 3G Electric with your pump model and serial number.

What is the pressure rating of Grundfos CR standard flanges?

The Grundfos CR standard flanges are rated to ANSI Class 150. This corresponds to a maximum working pressure of approximately 285 psi (19.6 bar) at ambient temperature, with derating at higher temperatures. The actual pressure capability of the flange assembly also depends on the gasket material and bolt torque. For applications near the pressure limit, ensure proper installation per Grundfos guidelines. The flanges are not suitable for higher pressure classes such as ANSI 300 or 600 without additional reinforcement.

Do the Grundfos CR flange kits include all necessary hardware?

Yes, the flange kits include the required hardware for installation. For example, SKU 856A76 includes 16 bolts, and SKU 856A93 includes 8 bolts. The kits also include gaskets: SKU 856A92 includes 2 gaskets, while other sets may include gaskets as part of the assembly. The exact contents are listed in the product specifications. Note that the flanges themselves are separate components; the kits provide the connection hardware. Always check the product description to confirm what is included for your specific SKU.

Can Grundfos CR flanges be used with other pump brands?

Grundfos CR flanges are specifically designed for Grundfos CR pump models. The bolt patterns, flange dimensions, and gasket profiles are tailored to match the pump's discharge and suction ports. Using these flanges with other pump brands is not recommended, as the sealing surfaces and bolt hole spacing may not align correctly, leading to leaks or mechanical stress. For non-Grundfos pumps, consult the pump manufacturer's flange specifications or use universal flanges designed for standard ANSI or DIN connections.

Does 3G Electric supply GRUNDFOS CR products?

Yes — 3G Electric (S) Pte. Ltd. supplies GRUNDFOS CR products. We stock the GRUNDFOS CR catalog and supply genuine factory-original products with full manufacturer warranty and technical support.