Bray MPF150_130_230_240 Series - Manual (Page 5)

Installation and Maintenance Manual
MPF150/300, MPT230/240 Ball Valves
Date: April 2012 / Page 5 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
2-1/2”-4” Model MPF150/300
Valve Disassembly Procedures:
1. Unscrew handle bolt (14);
2. Remove Lever(15) from Handle T-Bar (12);
3. Take handle T-bar off the Ball & Stem(3);
4. Unscrew off the Packing Nut(11), Belleville
Washer(10) and Gland Sleeve (9);
5. Unscrew Flanged End Cap Bolts(17), and
separate End Caps(1, 16) from the valve body;
6. Remove Seats(5) and Gaskets(6). Use caution to
prevent damage to metal parts;
7. Unscrew Bonnet Bolts(19), and Bonnet(18) will be
loose;
8. Separate bonnet away from valve body, and
remove Bonnet Gasket(20). Use caution to prevent
damage to metal parts;
9. Take O-Ring(7) and Stem Packing(8) out of
packing chamber on the bonnet;
10. Take ball & stem out of valve body, remove Stem
Bushing(4).
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. Place the Bonnet Gasket(9) onto the gasket groove
on top of the body;
4. Install Bonnet (18) onto the valve body, using
Bonnet Bolts(19); NOTE: Be careful not to damage
bonnet gasket when putting bonnet into body.
5. Tighten bolts in a “star” pattern to the torque
specified in the chart;
6. Place gasket (6) onto each of the 4 end caps(1,
16); Push the gasket all the way down to the
sealing surface of each end cap;
7. Install the seats (5) inside each seat pocket of
the end caps(1, 16), 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, 16) onto the valve body,
loosely tighten End Cap Bolts(17) 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 bolts 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.
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 Gland Sleeve (9) onto the stem, on top of the
stem packing;
13. Put Belleville washer (13) together in series mode
(bottom Belleville washer curve facing up, the top
Belleville washer curve facing down), and then
place them onto the stem, on top of the gland
sleeve;
14. Install Packing Nut(11) onto stem, on top of the
belleville washer; Screw packing nut onto valve
body; Tighten the packing nut to a snug tight
secure firm fit;
15. Install Handle T-Bar(12) and Lever(15);
16. Secure lever by Screwing and tightening Handle
Bolt(14);
17. Cycle the valve slowly with a gentle back and forth
motion, to build gradually to the full quarter turn. By