API 618 reciprocating compressors are almost never run at full speed in the factory. Packaged and skid-mounted units are sometimes run unloaded at the compressor…

1. Pre-Inspection Meeting. Held to review specifications and order requirements at the point of manufacture to verify there will be compliance. This visit should always…

Caution should be exercised when modifying reciprocating compressor suction systems because changes may alter the acoustic response. Unacceptable levels of vibration, high piping and nozzle…

Before considering valve upgrades, the overall compressor system must be evaluated. For example, to cure a liquid problem, the suction vessel must be looked at.…

The following methods can be used to change the capacity of the machine: • Change speed • Increase or decrease clearance of cylinders • Re-bore…

In many reciprocating compressor installations the pulsation dampers have integral moisture removal sections to provide a final line of defense against liquid carryover. There are…

Numerous approaches are currently employed to avoid excessive vibrations that can occur in the connected piping, instrumentation, etc. These include: 1. Relying on vendors to…

Simple volume bottles were the earliest method, and are still used in some applications for pulsation suppression. Many individuals and companies had their own methods…

Reciprocating machines generate primary and secondary forces and couples as a result of unbalanced rotating masses and unbalanced reciprocating masses which accelerate and decelerate each…

Loadless Starting Most motor-driven compressors are equipped with suction valve or plug-type unloaders on both ends of all cylinders on the frame to permit loadless…