A-T Controls Triac 88 Series Руководство по установке и обслуживанию - Страница 4
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Печатать страницу4.4. Remove the seat (4) and body gasket (5) from both sides of the body (1). Once removed, with the valve in the fully closed
position, the ball (3) should slide freely out of the body (1).
4.5. If equipped, remove the handle nut (25), handle (12), and the handle stop assembly items (18 & 19).
4.6. While holding the stem (7) stationary, remove the packing nut (11). Once removed, the locking saddle (10), Belleville washers
(17) and packing bushing (9) should be free to remove.
4.7. While holding the bottom of the stem (7), push the stem (7) through the inside of the valve body (1).
4.8. Remove the packing set (8) and stem seal (6).
4.9. Inspect all components for damage and if necessary clean or replace.
5.
ASSEMBLY
5.1. Care should be taken to not damage the surface finish of the valve components.
5.2. Place stem seal (6) on the stem (7) and install it by going through the body (1). Insert V-style packing set (8) over stem (7), with
the V pointing away from the valve (see Bill of Materials for correct orientation).
5.3. Install the packing gland (9), the Belleville washers (17), locking saddle (10), and packing nut (11). While holding the stem (7),
tighten the packing nut (11) to the torque listed in the Fastener Torque Chart. Tighten further if needed in order to be able to
place the locking saddle (10) over the packing nut (11).
5.4. Ensure the stem (7) is in the closed position with the body tang parallel with the flow of the valve. Insert a seat (4) and body
gasket (5) in one side of the body (1). Carefully slide the ball (3) into the body (1) and insert the other seat (4) and body gasket
(5).
5.5. Assemble ends (2) onto body (1). Insert all body bolts (15) and nuts (16) into valve and tighten to finger tight, making sure that
the ends (2) are flat against the body (1). Tighten all body bolts (15) (on both sides for valves 2-1/2"-4") from the nut (16) side
(if equipped) in a star pattern to 50% of the final torque shown in the Fastener Torque Chart. Using the handle (12) or an
adjustable wrench, cycle the valve 3 times. Tighten all body bolts (15) to the final torque in a star pattern. Check each body bolt
(15) torque and tighten if needed a final time. It is acceptable for the torque to relax slightly over time due to relaxation of the
polymer components, but the valve will still seal properly. If leakage is detected, repeat the steps for tightening the body bolts.
5.6. If required, assemble the locking device (21), handle stop (18 & 19), handle (12), and handle nut (25).
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Installation & Maintenance Manual
4
88 SERIES
Full Port Ball Valve
August 5, 2019
IOM07001 REVISION 01