Resolution of Check Valve Failures in Reciprocating Compressors

Abstract

Discharge line check valves for reciprocating compressors are subjected to pressure pulsations, varying flow rates, and debris in the gas stream. Consequently, swing check, piston check, and modified plate-style compressor check valves are sometimes susceptible to failures. This case study will discuss two applications in which poppet style compressor valve technology was implemented to resolve field failures.A natural gas feed reciprocating compressor routinely failed plate style check valves every 6-12 months. Thereafter, a valve modification was employed that resulted in doubling the runtime. The modified check valve technology resolved the problem related to pulsating and variable flow, resulting in improved run time and efficiency. A hydrogen reciprocating compressor, also experienced frequent check valve failures due to debris. Modified check valve technology was able to increase runtime from approximately one to over five years. A key lesson learned is that line check valves are in a harsh environment and should be customized for each application’s specific operating conditions to improve reliability.