Single Spring Cartridge Mechanical Seal for Grundfos Pumps

Description; 

We supply a comprehensive range of mechanical seals engineered specifically for Grundfos pump platforms, covering diverse industrial and utility applications. Each seal is available in multiple face material and elastomer combinations, selected to deliver optimal sealing performance, chemical compatibility, and extended service life across varied operating environments. 

 

Our single cartridge mechanical seals are designed for straightforward installation, consistent performance, and long-term reliability. The cartridge format eliminates the need for precise in-field setting dimensions, reducing installation error and maintenance downtime. Available across four shaft size variants, these seals are purpose-matched to specific Grundfos pump models, ensuring dimensional compatibility and optimised hydraulic performance from commissioning through to end-of-service. 

 

The SC610G is a precision-engineered, single cartridge mechanical seal developed specifically for Grundfos standard centrifugal pumps operating in water handling and industrial utility services. The seal is built around a hydraulically balanced sealing geometry that ensures stable and consistent face loading across a broad range of operating conditions — delivering controlled leakage performance, reduced frictional heat generation, and reliable sealing integrity under continuous-duty service. 

 

Key Features; 

• Single mechanical seal configuration delivering efficient, reliable sealing performance for Grundfos water‑handling and utility pump applications. 

• Bidirectional capability, independent of shaft rotation direction, making the seal suitable for a range of operating conditions and pump start‑up sequences. 

• Compact, cartridge‑style construction that is factory assembled and preset, ensuring simplified installation, accurate seal setting and easy removal during maintenance. 

• Corrosion‑resistant metallic construction and compatible face / elastomer combinations tailored for seawater, treated water and chemically conditioned utility fluids. 

• Internal‑mounted seal chamber configuration promoting effective lubrication, good pressure handling and protection of springs and dynamic components from contamination. 

• Hydraulically balanced seal design (where specified) to reduce face loading, limit heat generation and improve thermal stability and seal life under fluctuating pressure conditions. 

• Rotating single‑spring arrangement providing uniform face loading with a non‑clogging configuration suitable for light slurries, industrial washing systems and utility water services. 

• Low‑leakage operation with enhanced lubrication retention, supporting continuous‑duty service on Grundfos pumps used in ultrafiltration, reverse‑osmosis, circulation and general industrial utility duties. 

 

 

Service Overview; 

Parameter	Value
Equipment	Grundfos standard centrifugal pumps
Fluid	Process water, seawater, cleaning fluids, treated utility water
Service Nature	Corrosive, continuous-duty, low solids
Operating Mode	Continuous operation

 

Specifications; 

Item	Min	Max	Typical / Notes
Shaft Size	12 mm, 16 mm	22 mm, 32 mm	Metric sizes
Pressure	Vacuum	16 bar (232 psi)	Typical utility water service
Temperature	-20°C (-4°F)	+220°C (+428°F)	Depends on elastomer selection
Speed	—	3600 RPM	Standard centrifugal pump duty

 

Materials; 

Component	Standard Material	Optional Material	Comment
Seal Faces	Carbon / Silicon Carbide	Silicon Carbide / Tungsten Carbide	Based on fluid abrasiveness
Elastomers	FKM (Viton)	EPDM / PTFE	Chemical compatibility selection
Metal Parts	SS 316	Duplex SS / Hastelloy	Enhanced corrosion resistance
Springs	SS 316	Hastelloy Alloy	Suitable for aggressive water chemistry

 

Applications; 

• Ultrafiltration (UF) skids 

• Reverse osmosis (RO) plants 

• Utility and service water pumps 

• Process water circulation systems 

• Chemical dosing and circulation units 

• Seawater transfer and cooling systems 

• Industrial washing and cleaning pumps 

• Water treatment and desalination systems 

 

Operating Limits; 

Parameter	Value
Pressure	Up to 16 bar (232 psi)
Temperature	-20°C to + 220°C (-4°F to +428°F)
Speed	Up to 3600 RPM
Size Range	12mm, 16mm, 22mm, 32mm

 

Note; 

1. Certain operating parameters and material selections have been inferred using standard industry practices for Grundfos utility pump sealing applications and should be verified against actual operating conditions prior to final selection. 

1. This seal is not intended for abrasive slurry, high-solid-content fluids, or aggressive chemical services without prior engineering review and face/elastomer material confirmation. 

1. Available shaft sizes and compatible Grundfos pump model references are available upon request. Contact our technical team to confirm the correct seal variant for your specific pump model and service conditions.