Power Examples: Press Examples: Compressor Examples: Hydro Examples: Mining Examples: Petrochemical Examples: Steel Mill Examples: Various:
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Reciprocating Compressor (Crosshead Jamnut)
The large sizes of piston rods make it especially difficult to obtain proper tightness. Since tightening the nut requires going through an inspection door there is little room to maneuver. Solution: Thousands of crosshead jamnuts have been used in the field. The torque on the individual jackbolts is applied with only a hand held torque wrench to achieve a high preload. This eliminates the dangerous and inaccurate bolting methods commonly used. *Other applications on reciprocating compressors are: piston end nuts, anchorbolts, doghouse bolting, frame connections, connecting rods, power cylinders, piping, etc... Contact us for pictures and info on these applications.
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Problem: Crosshead Jamnuts are well known for the difficult and unsafe methods used to attempt to tightening them. Common methods include using sledgehammers, overhead cranes and even floor jacks. As an example, one petrochemical company employee had his jaw broken and facial damage when the wrench he had hit with a sledgehammer slipped and hit him. Other common occurrences include hand, arm, and back injuries.
Old Method