Overview
The NIBCO 736H seat (part 51729C001) is a premium replacement component designed for the M3011 B/F butterfly valve family. Constructed of ductile iron with EPDM sealing material, this 3-inch seat assembly provides bubble-tight shutoff at 200 PSI water and oil gas (WOG) service. The lug mounting style allows installation without a downstream flange, making it ideal for dead-end piping configurations in commercial and industrial systems.
Key Features
- 3-inch nominal pipe size with lug butterfly valve mounting
- Ductile iron body construction for durability and corrosion resistance
- Lever-operated, 10-position lockable handle mechanism for secure position control
- EPDM seat material compatible with hot and cold water, light industrial, and HVAC applications
- Stainless steel stem to prevent corrosion and ensure smooth operation
- Bronze disc for excellent sealing surface and long-term reliability
- 200 PSI WOG (water, oil, gas) pressure rating
Technical Specifications
This replacement seat meets NIBCO’s engineering standards for interchangeability and performance within the M3011 butterfly valve platform.
Typical Applications
- HVAC heating and cooling water distribution systems
- Commercial building potable water supply and pressure control
- Industrial process water flow control
- Light commercial vacuum and light industrial service
- Thermal energy storage and circulation systems
Compatibility & Replacements
Compatible With
- NIBCO M3011 B/F butterfly valve assemblies (all 3-inch lug configurations)
- 3-inch lug-type mounting flange systems
- 200 PSI rated piping systems
- WOG (water, oil, gas) service applications
Replaces / Drop-In Replacement For
- Original NIBCO M3011 seat assemblies (part 51729C001)
- Earlier-generation 3-inch lug butterfly valve seats in comparable pressure classes
Works With
- Ductile iron and cast iron valve bodies
- Stainless steel and bronze valve components
- Standard lever, worm gear, and electric actuators (with mechanical coupling)
