Assembly Procedure - GE Becker HPP-5 Installation And Maintenance Manual

HPP-5 Assembly Procedure
Assembly
NOTE: During assembly, moisten O-rings, threads, thrust bearings,
and the spring seat recess with a lightweight silicone grease�
Step 1� Using a 7/16-inch deep well socket, insert bottom seat
(rubber facing upward) (E) into the pilot body block (F)�
1a� Install strainer for balanced valves (D1) in the outside of
spacer (D) and insert assembly on top of bottom seat (E)�
1b� Insert the balanced valve assembly (C) with the stem facing
downward�
1c� Insert the second balanced valve assembly (C) with the stem
facing upward�
1d� Insert the second strainer (D1) and spacer (D) assembly�
1e� Insert the top seat (rubber facing downward) (E)�
1f� Secure the seat assembly to the pilot body block (F) with
two washers (C1), seat cover (B), and two flat head machine
screws (A)�
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NOTE: Install washers to compensate for tolerance variations�(For
steps 2-2a, refer to Figure 2)�
Step 2. Slide two -010 O-rings (G) onto valve adjusting
screw (H) and into the grooves at the top of the screw�
Do not lubricate the upper O-ring�
2a� Turn valve adjusting screw (H) into the inside piston (I) until
the screw head is flush with the piston recess�
Becker HPP-5 High Pressure Positioner Maintenance and Operation Manual | 12