Atlas Copco ZR 200, Instruction Book, Page: 58 / 110

Medium temperature
(°F)
Correction factor for maximum working pressure of
the compensator
122 1
176 1
185 0.92
194 0.83
203 0.75
212 0.67
221 0.6
230 0.54
Torque values
Compensator bolts should be torqued in 3 successive steps
• Step 1: Hand-tighten each bolt.
• Step 2: Torque the bolts crosswise up to the value mentioned in the table below and allow a
stabilization period of 30 minutes before moving to step 3.
• Step 3: Torque the bolts crosswise up to the value mentioned in the table below.
• Mind the parallelism of the sealing.
• Excessive torque will damage the sealing.
DN
(inch) Step 1 Step 2
(lbfin) Step 3
(lbfin)
2 – 3 hand tight 443 708
4 – 12 hand tight 443 885
14 – 20 hand tight 443 1551
Do's and don'ts
The supplied compensators are NOT designed:
• to carry the weight of the mounted customer pipe end.
• to work as a damper for unanchored pipe ends.
• to carry the thrust forces of the compressed air.
Therefore, adequate supporting and anchoring of the customer pipe end should be foreseen to
avoid compensator damage.
Instruction book
56 AIF999999