Belimo F6100HD Valve Assembly 321042-401 While the 1/2-inch bore is

While the 1/2-inch bore is a standard size

Built with a die-cast aluminum housing and a durable rolling neoprene diaphragm

This NAT FV Burner Assy comes factory-integrated with a #36 orifice

4” profile

Always check your controller's identification plate for the "RBP" designation

Belimo F6100HD Valve Assembly 321042-401 While the 1/2-inch bore isThe Belimo F6100HD is a heavy duty 4 inch 2 way butterfly valve engineered for high performance commercial HVAC and industrial hydronic system control. Featuring a ductile iron body and a 304 stainless steel disc, this assembly is built for durability in chilled water, hot water, and up to 50% glycol applications. With a Cv rating of 600 and a close off pressure of 200 psi, it ensures precise flow regulation and bubble tight shut off. The valve