A-T Controls Triac FD9 SERIES Manuel d'entretien - Page 2

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VISUAL INSPECTION:

7.1 Clean and inspect metal parts. It is not necessary to replace neither ball nor stem unless the surface has signs of

abrasion or corrosion. We strongly recommend replacement of all soft parts whenever the valve is disassembled for

reconditioning. We provide replacement kits that contain all the replaceable parts.

Note: The valve may be assembled and operated dry with any lubricant. However, a light lubrication will aid in

assembly and reduce initial operating torque. Lubricant used must be acceptable with the intended line fluid.

ASSEMBLY

Install one seat in the body cavity with the spherical curvature facing the ball.

8.1 Install the thrust washer on stem and slide the stem up through the body. Install packing, gland, belleville washers,

locking saddle. Screw the packing nut into the stem. Lock the saddle in place.

8.3 Install stop plate, handle and washer. Screw the stem nut into the stem until the handle is secure.

8.4 Turn handle to the closed position. Line up the ball slot with the stem end and slide the ball into position. Turn the

handle to the open position to hold the ball in place.

8.5 Install the remaining seat into body side.

8.6 Put body seal gasket into body 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 line flanges bolt pattern don' t line up. Be

certain to align end flanges bolt holes to straddle valve center lines. Be careful not to damage body seal when

putting cap end into body.

8.8 Install cap end nuts and tighten in the "star" pattern to the proper torque. Extreme care must be exercised during

adjustment of cap end nuts to make sure that complete engagement of the studs with body flange is maintained.

There should be at least one stud thread exposed on each side.

8.9 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 assume a permanent seal shape against the ball. A fast turning motion, at this point, may

cut the seats before they have a chance to form the proper seal.

8.10 Test valve, if possible, prior to placing valve back into line position. If not properly secured, the valve can separate

from the pressure source, resulting in possible injury. Always join the valve to companion flanges of same pressure

rating as valve and secure with a full set of flange bolts.

TEST AS FOLLOWS:

Secure valve to a test fixture by means of a mating flange with full bolting and a suitable gasket. Orient valve so

seat to be tested is facing up.

Introduce 50 to 100 psig air. Partially cycle the valve, under pressure, then slowly close to make sure the cavity is

pressurized (use hearing protection). Pour water into the upper port to cover the ball and visually check for bubbles.

If bubbles appear, pour the water out, cycle the valve several times and recheck. To check for leakage in the other

port, reverse the valve and introduce air pressure to the port just checked.

Check stem seal at this time by coating the stem top area with a water/soap solution. If leakage occurs, tighten stem

seal just until leakage stops.

Valve Size

Break Away Torque

150# Flange

½"

110

¾"

140

175

1-1/2"

400

450

2-1/2"

620

1000

1600

2700

www.a-tcontrols.com



(In-lbs.)

300# Flange

125

175

220

450

525

750

1400

1900

3050

Full Port Ball Valve 150# / #300 ANSI Flanged

Installation & Maintenance Manual

Torque of Body Bolts

(In-lbs.)

174 ~ 200

200 ~ 217

260 ~ 286

286 ~ 304

347 ~ 391

477 ~ 521

\\Atfs1\Engineering\documents\products\IOM\IOM7015

FD9 SERIES Firesafe

Torque of Stem Nut

(In-lbs.)

130

208

304

391

December 5, 2011