page 12
REASSEMBLY AFTER INSPECTION:
All parts and sealing surfaces must be cleaned before reassembly. Worn parts and seals should be
replaced prior to reassembly..
1.
Lay the head assembly upside down on a clean surface so that the disc is up.
2.
Place the Bonnet Gasket (412) in the groove in the Bonnet (407). Place a Bonnet Bolt Washer (405) on
each of the Bonnet Bolts (406). Carefully slide the bolts into the bolt holes and then through the
corresponding holes in the Bonnet Gasket. Ensure that the bonnet bolts are properly located by their
length. The longer bonnet bolts are upstream. The bonnet bolts will hold the Bonnet Gasket in place.
3.
Pick up the head assembly holding the bolts and Bonnet Gasket in place and mount it on the valve body.
Ensure that the disc is facing the proper direction and that the Bonnet Gasket is not being pinched between
the bonnet and valve body.
4.
Tighten the bonnet bolts to 45 ft-lbs incrementally in a crossover pattern to ensure that the bonnet does not
bend or crack and the bonnet gasket is evenly compressed.
5.
If equipped with a lever and weight assembly, remount weights if necessary. If equipped with a lever and
spring assembly, reattach spring.
