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LT Valve Manual - 1.0 Assembly Procedures
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Check surfaces around the valve bore inside the valve pocket for sharp edges that could cause cutting of the insert o-rings.
step 1 & step 2 Screw the clean adjusting nut (13) all the way into the valve body to make sure the threads are not damaged. After inspection, remove the adjusting nut (13) and install adjusting nut o-ring (12).
step 3 Check the roll pins (8) in the valve body by gently sliding a set of inserts (10) into the valve. The inserts should move freely up and down the length of the roll pin slots without interference.
step 4 & step 5 Install the plug seals (7) into the recess in the valve body and adjusting nut with the metal back up towards the recess and facing away from the pressure. Always apply a film of lubricant before pressing the plug seals into place.
step 6 &
step 7 &
step 8 Check the plug (11) outside diameter for surface defects such as nicks, dings, scratches, etc. that could possibly affect the sealing area. Pack adjusting nut(13) plug seal(7) with valve grease. Install the lower end of the plug (11)(opposite the hex/keyway) in the adjusting nut (13) and push down until the plug shoulders on the adjusting nut.
step 9 Apply a thin film of grease to the entire O.D. of the plug (11).
step 10 &
step 11 &
step 12 &
step 13 Check the surface finish of the inserts (10) making sure it does not have any scratches, dings, nicks, or sharp edges that could also affect the sealing area. Inspect the o-rings for any possible non-conformities. Place the inserts (10) around the plug and insert the o-rings into the grooves and pack with grease to thoroughly grease the sealing surface.
step 14 Secure the plug to the adjusting nut with a cap screw (1) and two washers (2 & 14).
step 15 Lubricate the valve pocket.
step 16 Apply thread compound (Never-sez) to the adjusting threads and adjusting nut sealing surfaces.
step 17 &
step 18 Install the plug (11), inserts (10) and adjusting nut (13) assembly into the valve body. Support the valve so that the plug (11) hex can pass through unobstructed.
step 19 Screw in the adjusting nut until proper alignment is obtained between the valve bore and the insert and plug. Do not tighten beyond proper alignment as actuating an over tightened valve could damage internal parts. If sight through the bore is not possible, then screw in the adjusting nut until 1/2 or no threads are visible.
step 20 Install grease fitting (6).
step 21 &
step 22 &
step 23 Place spiral ring on male end connection and place wing nut and nut retainers and secure with spiral ring (for certain end connections only).
step 24 &
step 25 &
step 26 Install stop bolt (5) and stop collar (4) (if required), and handle adapter (3) on top of the valve and secure with a cap screw (1) and two washers (2 & 14).
step 27 &
step 28 Remove excess grease from valve bore and inspect plug alignment. Adjust as necessary with adjusting nut (13).
step 29 Open the valve with the handle adapter (3) and pump grease through the grease fitting (6) to approximately 3000 p.s.i. Actuate the valve to release grease pressure.
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