C&C API 6D, Инструкция по установке, эксплуатации и обслуживанию

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API 6D Two - Piece Cast Trunnion
Mounted Ball Valve
Atlas Series
Document Number:
Revision:
Release Date:
EDC 506
0
01/03/2018
IOM: Installation, Operation and Maintenance Manual
12/17

During this operation, particular care shall be paid not to damage both the stem (4) and the key
(25).

Remove the stem key (25).

Unscrew the body nuts (15), leaving a few on closure for easier handling.

Turn the valve and rest it in one end flange. In this way, the valve bore will be in vertical position.

Pay attention not to damage the surface of the flanged end.

Unscrew the remaining body nuts (15) left on the closure (2).

Lift carefully the closure (2) paying attention not to damage the body O-Ring (12) and body gasket
(13) which can follow the closure or stay in the body cavity.

Unscrew the gland flange caps screw (31) and remove the gland pins (30) from the gland flange
using eyebolts fitted in the threaded hole in the pins.

Remove the stem fire safe seal (28).

Unscrew the trunnion cap screws (36).

Extract trunnion (5) from the body (1) and remove the trunnion O-Ring (32) and trunnion gasket
(33).

Welded connections shall not be removed.
Stem Retained in the body design
(2”-4” for all pressure class up to 1500)

Remove the ball (3) from the body (1) by using nylon rope or strap without damage

Remove the stem (4) from the body through end entry.

Extract the lantern ring (20) from the body (1) through top.

It is possible to remove the stem injection fitting (38) for cleaning.
Stem Retaining Pin design
(6” & larger for class 150 and 300)

Remove the stem injection fitting (38). Using an allen wrench, unscrew the stem retaining pin
(27) provided inside the fitting (38).

Extract the stem (4) and lantern ring (20) group from the body.

Remove the ball (3) from the body (1) by using nylon rope or strap without damage.
Segment Ring Design (
8” & larger for class 300 and 6” & larger for class 600, 900 and 1500)

Remove the segment ring retainer (24) and extract the segment ring (23).

Extract the stem (4) and lantern ring (20) group from the body.

Remove the ball (3) from the body (1) by using nylon rope or strap without damage

Place the ball (3) on a wooden block.

Extract the seat ring (6) from the body (1) and closure (2). Seat seal can be either O-Rings (9) or an
insert (7).
It is not possible to remove seat insert (7), if found damaged, new seat rings (6) with inserts shall be
used during reassembly.

Remove trunnion thrust washer (34), where provided, if damaged only. Trunnion bearing (35) may
be removed using an extractor.

Remove stem thrust washer (18), and stem bearing (19) from the stem (4).

Remove the seat O-Rings (9) and the fire safe seat seal (8).

Remove the stem O-Rings (21) from the lantern ring (20).

Remove the seat springs (11) from their housing in the seat (8) or in the body (1) & closure (2),
where provided.