Grundfos 97788185 Shaft Seal Kit for CRT 8 & CRT 16 Pumps

Grundfos 97788185 Kit, Shaft Seal CRT 8, 16

This is a high spec, factory guaranteed mechanical seal overhaul set for the Grundfos CRT 8 and CRT 16 vertical multistage centrifugal pump series with Grundfos part number 97788185. This kit is specifically designed for harsh industrial, chemical processing and marine conditions, and has the distinctive DQQV seal arrangement. Titanium is used for fluid contact parts in the CRT series. This seal kit is a necessary necessity for pressure containment and fluid isolation while pumping harsh media such as saltwater, brackish water and industrial acids.

Model Details

• Product Name: Kit, Shaft Seal CRT 8, 16
• Manufacturer Part Number (MPN): 97788185
• Seal Type/Code: DQQV (Silicon Carbide/Silicon Carbide/FKM)
• Global Trade Item Number (EAN/UPC): 5710624746868
• Production Version/Constraint: Suitable for pump models manufactured after April 2004 (Mfg > 0404)

Technical Details: 97788185 Shaft Seal Kit

Compatibility

This genuine Grundfos repair kit is explicitly mapped to the following equipment models and configurations:

• Grundfos CRT Series: CRT 8, CRT 16 vertical multistage pumps.
• Material Matrix Match: Specifically calibrated for Titanium executions of the CR series (CRT), where handling high-salinity fluids prohibits standard stainless steel components.
• Generational Fit: Only compatible with pumps indicating production dates newer than week 04 of the year 2004 (Mfg > 0404).

Part Number Cross-References

• Grundfos Internal ID: 97788185
• EAN Code: 5710624746868
• HTS Tariff Code: 8413.91.00 (Pump Parts)

Main Features

1. Matched DQQV Seal Face Engineering: Dual silicon carbide faces provide outstanding resistance to abrasive crystalline compounds, scaling and harsh chemical shearing.
2. FKM Secondary Elastomers Premium Viton O-rings offer superior resistance to localized organic solvents, ozone and acid mixtures in certain temperature ranges.
3. Corrosion Resistant Metal Hardware – Structural components compatible with the titanium pump body metallurgy to avoid galvanic corrosion at the shaft mating surface.
4. Micron-Level Dimensional Tolerance: Machined to micron-level for instant mechanical seal with no protracted break-in or early face tracking.

Industrial & Marine Applications

• Desalination & Water Treatment: Reverse osmosis (RO) high-pressure booster feeds and brackish water filtration loops.
• Chemical Processing: Transport of chlorinated compounds, organic acids, and corrosive industrial chemicals compatible with FKM and Silicon Carbide.
• Marine & Offshore Utilities: Sea-water cooling infrastructure, ballast auxiliary systems, and onboard grey-water management.
• Semiconductor & Electronics: Micro-chip wash lines handling high-purity deionized water containing aggressive cleaning solutions.

Pre-Installation Inspection & Micro-Tolerances

1. Face Contamination Banned: Silicon Carbide faces (Q-faces) are extremely brittle and sensitive to grease or particulate contamination. Never touch the polished seal faces with bare hands. Use lint-free wipes and a quick spray of electronics cleaner if contact occurs.
2. The Shaft Check: Prior to sliding the new seal assembly onto the titanium shaft sleeve, check for micro-pitting or scoring. Any radial imperfection greater than 0.8 micrometers will slice the dynamic FKM O-ring during pressurized operation, creating an immediate leak path.
3. Lubrication Strategy: Use only pure silicone grease or a weak solution of liquid soap/clean water to lubricate the secondary FKM O-rings during installation. Never use petroleum-based lubricants or mineral oils; doing so will cause the FKM elastomer to swell, deform, and lock up the spring assembly, causing immediate dry-run face destruction.aa