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About this part
Union bonnet
Plug type disc
450 Brinell hardened stainless steel seat ring
2" and smaller have compact union bonnet
2-1/2" and 3" use bolted bonnet
MSS Specification SP-80, Type 3
Working pressures non-shock: 300 psi Steam, basic rating 1/4" through 2" - 1000 psi Cold working pressure2-1/2" through 3" - 600 psi Cold working pressure