Hoffman 604001 Cover Assembly 3/4 1 Inch Npt Steam Trap

Product Description

The HOFFMAN 604001 is a service package cover assembly designed for use with float and thermostatic (F and T) steam traps operating at up to 15 psi. This cover serves as a replacement or service component for traps handling 3/4 inch and 1 inch NPT connections. It provides a sealing surface and access point for internal trap components, making it a standard part of scheduled maintenance and field repair work on steam distribution systems. Licensed steam fitters and HVAC-R technicians working on low-pressure steam heating systems will find this a direct-fit service part.

This cover assembly is suited for residential and light commercial steam heating applications where float and thermostatic traps are used to discharge condensate and non-condensable gases while holding back live steam. It is commonly installed during trap rebuilds or when a cover shows wear, corrosion, or damage that compromises the trap seal. Steam systems requiring consistent condensate management and pressure integrity depend on properly seated cover assemblies like this one.

Key Features

• Compatible with both 3/4 inch and 1 inch NPT trap bodies
• Rated for steam trap service at up to 15 psi
• Designed for float and thermostatic trap configurations
• Supports scheduled maintenance and field service without full trap replacement
• Direct OEM-style fitment for specified model series

Compatibility

Designed for use with Bell Gossett Hoffman Specialty Model FT0I5H-3 and FT0I5H-4 float and thermostatic steam traps in 3/4 inch and 1 inch NPT configurations rated at 15 psi.

Installation Notes

Installation should be performed by a licensed steam fitter or qualified HVAC-R technician. Isolate the trap from the steam supply and condensate return lines and allow the system to depressurize and cool fully before disassembly. Inspect the mating sealing surface on the trap body for corrosion or pitting before fitting the new cover. Follow applicable local mechanical codes and the manufacturer service documentation for proper assembly sequence and fastener engagement.

Technical Specifications

• Connection Size: 3/4 inch and 1 inch NPT
• Maximum Pressure: 15 psi
• Trap Type: Float and Thermostatic

Standard Information

• Brand: HOFFMAN
• Manufacturer Part Number: 604001