US 12,281,803 B2
Boiler pressure relief valve and automatic air vent isolation assembly
Christopher W. Mason, Granger, IN (US)
Assigned to NIBCO Inc., Elkhart, IN (US)
Filed by NIBCO Inc., Elkhart, IN (US)
Filed on Nov. 11, 2021, as Appl. No. 17/524,010.
Prior Publication US 2023/0141143 A1, May 11, 2023
Int. Cl. F24D 19/08 (2006.01); F16K 11/22 (2006.01); G01L 19/14 (2006.01)
CPC F24D 19/083 (2013.01) [F16K 11/22 (2013.01); G01L 19/14 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A valve assembly, comprising:
a unitary valve body having a first end section, a second end section, and a medial section located in between said first end section and said second end section, wherein said first end section has opposed first and second ports with a generally perpendicular section that transitions into said medial section; and
said second end section includes a third port that is positioned generally perpendicular to said medial section after an elbow in the fluid passageway of said unitary valve body;
a union member, coupled to said second port;
a valve member located on said unitary valve body in between said elbow and said third port in said second end section, wherein said valve member opens and closes said fluid passageway between said elbow and said third port;
a pressure relief valve having a handle and a discharge port coupled to said first port;
an automatic air vent with a vent cap that automatically releases trapped air, coupled to said third port;
a fourth port located in said medial section; and
a gauge coupled to said fourth port.