USSEAL186827LF 186827LF Seal Kit 1-3/8 Inch Shaft Vsc Vscs

Product Description

The USSEAL186827LF 186827LF is a lead-free seal kit designed for circulator and inline pumps running 1-3/8 inch shafts. The kit combines a Buna-N elastomer, carbon rotating face, and ceramic stationary seat to form a complete mechanical seal assembly. The brass seal body provides a durable, corrosion-resistant housing suited to hydronic heating system service. Licensed plumbers and HVAC service technicians install this kit during routine pump maintenance or when a worn mechanical seal causes leakage at the pump shaft.

This seal kit is rated for heating applications and is intended for use with VSC and VSCS series pumps equipped with a 1-3/8 inch shaft. It is a direct-replacement kit that restores full mechanical seal integrity without requiring a complete pump replacement. To confirm correct shaft size before ordering, refer to the individual pump series documentation for the specific unit being serviced.

Key Features

• Lead-free construction meets current plumbing code requirements for potable and heating system service
• Buna-N elastomer provides flexibility and resistance to common hydronic system fluids
• Carbon and ceramic seal faces deliver reliable, low-wear sealing at the shaft interface
• Brass seal body offers corrosion resistance in wet heating environments
• Sized for 1-3/8 inch pump shafts used in VSC and VSCS series units
• Complete kit format simplifies field replacement without sourcing individual components

Compatibility

Designed for use with VSC Series Pumps and VSCS Series Pumps equipped with a 1-3/8 inch shaft. Refer to the individual pump series specification sheet to verify shaft size before installation.

Installation Notes

Mechanical seal replacement on hydronic circulator pumps is typically performed by a licensed plumber or HVAC technician. Shut off and drain the system section containing the pump and allow components to cool before disassembly. Clean the shaft and seal cavity thoroughly before seating the new seal components to prevent premature wear. Follow local plumbing codes and the pump manufacturer service documentation for correct assembly sequence and torque procedures.

Technical Specifications

• Type: Seal Kit
• Shaft Size: 1-3/8 inches
• Elastomer Material: Buna-N
• Seal Body Material: Brass
• Seal Faces: Carbon and Ceramic
• Lead Free: Yes
• Application: Heating

Standard Information

• Brand: USSEAL186827LF
• Manufacturer Part Number: 186827LF