Bray MPF150_130_230_240 Series - Manual (Page 7)

Installation and Maintenance Manual
MPF150/300, MPT230/240 Ball Valves
Date: April 2012 / Page 7 of 8
®
A Subsidiary of BRAY INTERNATIONAL, Inc.
FLOW-TEK, Inc. Tel: 832.912.2300 © 2011 Flow-Tek, Inc.
8323 N. Eldridge Pkwy #100 Fax: 832.912.2301
Houston, Texas 77041 www.flow-tek.com
6”-8” Model MPF150/300
Valve Disassembly Procedures:
1. Remove Lever(14) from Handle Head (13);
2. Take handle head off the Ball & Stem(3), remove
Stop Ring(12) and Stop Plate(11);
3. Unscrew off the Gland Bolts(18), remove
Gland(10);
4. Unscrew Flanged End Nuts(17a), and separate
End Caps(1, 15) from the valve body;
5. Remove Seats(5) and Gaskets(6). Use caution to
prevent damage to metal parts;
6. Unscrew Bonnet Nuts(17b), and Bonnet(19) will
be loose;
7. Separate bonnet away from valve body, and
remove Bonnet Gasket(9). Use caution to prevent
damage to metal parts;
8. Take O-Ring(7) and Stem Packing(8) out of
packing chamber on the bonnet;
9. Take ball & stem out of valve body, remove Stem
Bushing(4);
10. If neccesary, all studs(16a,16b) may be unscrewed
at this time.
Valve Assembly Procedures:
1. Install Stem Bushing (4) in the bottom center hole
insdie valve Body (2);
2. Slide the trunnion of the Ball & Stem (3) into the
stem bushing;
3. Screw the Bonnet Studs (16b) into the threaded
holes on top of the valve body;
4. Place the Bonnet Gasket(9) onto the gasket groove
on top of the body;
5. Install Bonnet (19) onto the valve body, using
Bonnet Nuts(17b); NOTE: Be careful not to
damage bonnet gasket when putting bonnet into
body.
6. Tighten nuts in a “star” pattern to the torque
specified in the chart. WARNING:There should be
at least one stud thread exposed; 7 Screw the End
Cap Studs (16a) into the threaded holes on side
of the valve body; 8 Place gasket (6) onto each of
the 4 end caps(1, 15); Push the gasket all the way
down to the sealing surface of each end cap;
7. Install the seats (4) inside each seat pocket of
the end caps(1, 15), make sure the spherical
curvature side of the seat will face the ball;
8. Turn the ball so that the ball opening is parallel to
the port centerline;
9. Assemble the end cap (1, 15) onto the valve body,
loosely tighten End Cap Nuts(17a) and line up
end flange. Because the body flange bolt pattern
is different from the line flange bolt pattern, it is
possible to assemble the valve such that the bolt
holes in the line flanges don’t line up. Be certain
to align end flanges bolt holes to straddle valve
center lines. NOTE: Be careful not to damage
gasket when putting end cap into body.
10. Tighten nuts in a “star” pattern to the torque
specified in the chart; Tighten one end piece in
a similar fashion as tightening the opposite end
piece. Do not tighten one end piece fully until the
opposite end piece were fully tightened. Note:
Valve must be in the 100% full open position.
WARNING:There should be at least one stud
thread exposed;
11. Install O-Ring(7), and then slide the Stem Packing
(8) onto the stem until it is seated against the
upper bottom of the stem hole;
12. Put packing gland(10) onto the stem, on top of
the stem packing; lightly tighten gland bolt (18) to
secure the gland;
13. Install Stop Plate(11) and Stop Ring (12);
14. Install Handle Head(13) and Lever(14);
15. Cycle the valve slowly with a gentle back and forth
motion, to build gradually to the full quarter turn. By
cycling slowly, the seat lips will assure a permanent
seal shape against the ball. A fast turning motion,
at this point, may cut the seats before they have a