4 - 18 Maintenance and Repair
4.12 Purge and Outlet Check ValveMaintenance

(Models LS60 through LS760)

WARNING!
Ensure that the dryer is de-energized, valve isolated,
and fully depressurized before attempting to remove
or disassemble any dryer component or subassem-
bly. Failure to do so may result in serious personal
injury and/or equipment damage.
Note: The purge orifice [15] is specifically sized and drilled
for your dryer. If the purge orifice [5] is lost or damaged,
contact your local Deltech Sales Representative for the
correct replacement.
Note: Do Not remove shoulder bolts [1] from the valve
body [13] unless wear or damage necessitates replace-
ment. If replacement is required, apply Loctite™ RC-680
to threads upon reassembly.
1. Clean and inspect all valve hardware upon disassem-
bly. Replace all software and any hardware which
appears damaged or abnormally worn. Closely in-
spect valve poppets [12], check balls [11], purge ad-
justing valve [7] and associated mating-sealing sur-
faces for any faults which could prevent positive seal-
ing.
2. Apply an ultra-thin film of O-ring lubricant to items [3],
[5], [9], and [10]. Do not apply lubricant to check
balls [11] or valve poppets [12].
IMPORTANT NOTICE
Due to potential damage of screwed fasteners from over
torquing, fatigue, and corrosion, maintain the following pro-
cedure.
Inspect internal threads for conformity to ensure no dam-
age was caused during previous assembly and/or disas-
sembly, and remove all foreign debris.
Apply a light coat of Never Seize lubricant to the new
sockethead cap screws provided in the repair kit. Hand
tighten screws until snug. Torque as outlined in the sched-
ule below.
TORQUE TABLE
SIZE TORQUE
1/4 - 20 30 - 40 inch lbs. (3.4 - 4.5 Nm)
5/16 - 18 130 - 135 inch lbs. (14.7 - 15.3 Nm)
3/8 - 16 240 - 245 inch lbs. (27.1 - 27.7 Nm)
1/2 - 13 525 - 550 inch lbs. (59.3 - 62.2 Nm)
Nm = Newton-meters
Purge and Outlet Check Valve
Item Description Total
1 Shoulder Bolt 2
2 Sockethead Cap Screw 4
3 O-Ring 1
4 Roll Pin 2
5 O-Ring 2
6 Pipe Plug 2
7 Purge Adjusting Valve 1
8 Valve Guide 1
9 Tetraseal 1
10 O-Ring 1
11 Check Ball 2
12 Valve Poppet 2
13 Valve Body 1
14 Pipe Plug 2
15 Purge Orifice 2