TRIAD SERIES 3-PIECE BALL VALVE
Installation, Operation, and Maintenance Manual
of © BRAY INTERNATIONAL INC ALL RIGHTS RESERVED BRAYCOM The Information
contained herein shall not be copied transferred conveyed or displayed in any manner that would
violate its proprietary nature without the express written permission of Bray International Inc
Visual Inspection
Clean and inspect metal parts It is not necessary to replace the
ball and stem unless the sealing surfaces have been damaged
by scratches abrasion or corrosion Verify threads and threaded
holes are clean and free from thread locker paint media and
foreign material Check all sealing areas on metal parts for
damage Replacement of all soft parts is strongly recommend
whenever the valve is disassembled for reconditioning This is
the surest protection against subsequent leakage after valve
assembly The replacement parts can be ordered in kit form
Valve Assembly Procedure Full Port NPS to (DN to )
Standard Port NPS ¾ to (DN - )
NOTICE
Certain valve constructions are uni-directional A flow arrow
will indicate the flow direction Care should be take when
rebuilding the valve to ensure these special constructions are
considered
Hold the body in a vise firmly enough to prevent movement
but do not crush or damage the body
Place the thrust washer protector and thrust washer on the
stem and slide the stem into the stem hole in the valve body
Be careful not to damage the stem or body
Install the stem packing onto the stem until it is rested
against the bottom of the packing bore See Figure for
proper orientation
Install the packing protector and then the packing gland onto
the stem and top of the stem packing
Turn the stem until the stem flat is parallel to the port
centerline (so that the ball can fit onto the stem)
lnstall one seat inside the body and two body seals (inner and
outer) inside an end cap make sure the spherical curvature
side of the seat will face the ball
NOTICE
Body boltsbody nuts must be tightened in a cross or star
pattern to prevent uneven loading of the body seal
Lubricate threads and the bolt and nut faces in contact with
the end caps with grease compatible with the media Install
the end cap onto the body with the body bolts Tighten the
body bolts in a cross pattern per Figure based on number
of fasteners per body joint Fastener torque should applied
at and and once more at increments per
Table
Rotate the stem to the closed position and install the ball
inside the valve body The stem flats will fit into the slot on
top of the ball Lifting aid may be required to install the ball
Be careful not to damage sealing surfaces of ball or body
Figure - Stem Seal Packing
Orientation
V-ring Packing
Graphite Packing
Combo Packing
To Next Page
Loading...