Skid Leveling And Alignment; Compressor Frame Leveling - GE H301 Series Operating Manual

Reciprocating inertial forces are balanced on HSR's, but
unbalanced couples also exist. The magnitude of these
unbalanced forces and couples, if not shown on the
foundation drawing, may be obtained from the Packager.
B. Support the total weight of the compressor assembly and attachments,
without bending or twisting the compressor frame, crosshead guides or
cylinders.
C. Provide skid rigidity to maintain correct drive train and running gear
alignment.

Skid Leveling and Alignment

For long-term compressor performance proper alignment of the compressor/
drive is required. When a compressor's drive train is properly aligned for its
hot operating conditions, the resulting forces are minimized. Establishing and
maintaining good alignment results in efficient, smooth running equipment.

Compressor Frame leveling

The fabricated compressor pedestal should be designed for
use of anchor bolt capscrew length not less than 10 times the
1. When installing the compressor frame onto the fabricated pedestal, first
use blocks or tapered wedges under the main skid and a level on top of the
compressor pedestal to position the fabricated skid axially and longitudinally
such that the bubble is centered in the level's vial.
2. Place a .060 to .120" (1.524 to 3.048 mm) thick stack of stainless steel shims
over each anchor bolt hole location.
3. Carefully position the compressor frame onto the shim packs on the
compressor pedestal.
4. Hand tighten the anchor capscrews.
5. Check for loose shims at each anchor capscrew location. Add additional
shims to provide a snug fit of each shim pack (if required).
6. Verify the compressor assembly is level: remove the frame's top cover and
place a machinist's level on the crankcase. Add or remove shims as required
to level the compressor to the pedestal. After leveling, securely torque the
frame's anchor capscrews to specification and verify the frame did not move
with the machinist's level.
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
capscrew diameter.
Complies with ANSI Z535, ISO 3864, OSHA 1910.145 (f) (9)
H301/302 HSR Compressors | Rev. 2.2 | 41