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LiqTec™
| | The most common cause of pump failure is dry running. LiqTec ™has a run-dry sensor that stops the pump immediately if there is no liquid in the pump. The sensor is easily inserted through the pump head close
to the shaft seal. | | CR(I)(N)1/3/5/10/15/20
CR(N)32/45/64/90 |
FFKM shaft seal (Kalrez ®)
| | Chemically resistant FFKM rubber O-rings. Recommended for applications where the pumped liquids may damage the standard O-ring material, in which case all O-rings in shaft seals and plugs must be replaced. | | CR(I)(N)1/3/5/10/15/20
CR(N)32/45/64/90 |
Hybrid shaft seal
| | Recommended for applications involving the risk of dry-running. The stationary seat of the shaft seal is equipped with an extra special carbon seal face, which expands at high temperatures; for instance, as a result of dry-running. This prevents the usual damaging effects of dry-running such as leakage and noise. Hybrid shaft seal available as standard in CR(N)32/45/64/90. | | CR(N)32/45/64/90 |
High-pressure shaft seal
| | Recommended for applications involving pressures between 360 psi/25 bar and 580 psi/40 bar. | | CR(N)32/45/64/90 |
Cool-Top™ air cooled shaft seal system
| | Recommended for applications involving extremely high temperatures. No conventional mechanical shaft seal can withstand liquid temperatures of up to 356 °F (180 °C) for any length of time. For that type of application, Grundfos’ unique air-cooled shaft seal is recommended.
In order to ensure a low liquid temperature around the standard shaft seal, the pump is fitted with a special air-cooled shaft seal chamber. No separate cooling is required. | | CRI, CRN 1/3/5/10/15/20
CR(N) 32/45/64/90 |
Double shaft seal with pressure chamber
Optional with pressure intensifier or with Dosing Pump | | Recommended for applications involving poisonous or explosive liquids. Protects the surrounding environment and the people working in the vicinity of the pump.
Consists of two seals mounted in a “back-to-back ” arrangement inside a separate pressure seal chamber. As the pressure in the chamber is higher than the pump pressure, leakage is prevented. A dosing pump or a special pressure-intensifier generates the seal chamber pressure. | | CRI, CRN 1/3/5/10/15/20
CR(N)32/45/64/90
|
Double shaft seal with flushing chamber (quench seal)
| | Recommended for applications involving a high risk of crystallization (sugar water)or hardening (oil products).
Consists of two seals mounted in a tandem arrangement inside a rinsing chamber, connected to an external rinsing source. | | CR(I)(N)1/3/5/10/15/20
CR(N) 32/45/64/90 |
SiC/SiC shaft seal for CRT
| | Recommended for applications involving a high risk of corrosion. Available in EPDM, FKM, NBR qualities. | | CRT 2/4/8/16 |
| CR MAG Drive | | Magnetic drive pumps or industrial applications. Key applications are industrial process pumps handling aggressive, environmentally dangerous or volatile liquids, e.g.organic compounds, solvents, and the like. | | CRI, CRN 1/3/5 |
