Pressure Relief Valves

TRUMBULL INDUSTRIES, INC.

TRUMBULL PRESSURE RELIEF VALVES

   Trumbull Tank Pressure Relief Valves are designed for use
in tanks of treatment plants.These valves are for low seating or
unseating pressure applications only. They will start to open at less
than one foot of head.

     Floor Type pressure relief valves are cast in the bottom of
tanks in treatment plants to keep empty tanks from floating from an
excess of groundwater beneath them.
     When this condition occurs, the hydrostatic pressure will
open the cover of the valve allowing water to enter, thereby equaliz-
ing pressure inside and outside the tank and preventing it from
floating.
     Lugs in the body prevent the cover or strainer from becom-
ing separated from the body of the valve due to flow. Both can be
removed when necessary, however, by turning to the right or left.
     Floor type valves are normally stocked in 4" and 6" sizes, in
both 16" and 24" lengths. They can be cut to exact length required.

     Wall Type pressure relief valves are similar to the floor type
but are installed in tank side walls; the valve has a flanged base for
use with a wall pipe. The flange drilling is according to ANSI 125#
STD. on both sizes. The wall pipe has a wall collar and tapped bolt
holes to allow the flange on the wall pipe to be set flush with the
wall. The wall type valve uses a stainless steel hinge pin and has a
strainer retained in the body of the valve.
     In order for the wall type valve to operate properly, it must be
installed so that the bolt holes straddle the centerline. Care should
be used to cast the wall pipe accordingly.
     Both valve types use two Buna-N seating surfaces so that, if
particles of grit lodge on them, the head of liquid in the tank will
force the valve closed, preventing seepage of liquid into the ground.
Special square design of rubber seats surrounds valve body and
cover on four surfaces to prevent separation or leakage.
No flange accessories will be furnished unless ordered separately.

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Description	4"	Weight	6"	Weight
Floor Valve, 9" through 16" long Floor Valve, 18" through 24" long Wall Valve Wall Pipe	367-1010 367-1020 367-1005 367-1000	36. 5# 46# 26# 32#	367-1021 367-1022 367-1006 367-1002	64# 64# 40# 67#