Reciprocating refrigeration compressor gasket leakage, material selection and periodic replacement specification

Reciprocating refrigeration compressor gasket leakage, material selection and periodic replacement specification

Gaskets are used to seal cylinder head, crankcase and pipeline flange of reciprocating refrigeration compressor; gasket aging, compression relaxation and chemical corrosion are the main leakage causes. Gasket material shall match refrigerant type and lubricant; common fiber composite gasket is suitable for ammonia system, while PTFE composite gasket is recommended for HFC refrigerants. Xiteliduo reciprocating compressor adopts reinforced PTFE gaskets as standard configuration; the recommended replacement cycle is 8000 operating hours or 2 years, whichever comes first. Small 4-cyl reciprocating refrigeration compressor cylinder head gasket leakage often appears after repeated thermal cycling; temperature fluctuation makes gasket lose compression force gradually. Medium 4-cyl reciprocating refrigeration compressor crankcase gasket leakage is hard to detect at early stage; oil mist escaping from tiny gaps accumulates and forms oil stains on casing surface. Large 4-cyl reciprocating refrigeration compressor multi-section cylinder assembly has more gasket joints; any missed gasket during reassembly will cause immediate leakage after startup. Large 6-cyl reciprocating refrigeration compressor cylinder head bolt tightening torque must follow specified sequence; uneven torque will deform gasket and lead to partial sealing failure. Many maintenance technicians reuse old gaskets during overhaul. Reused gaskets have a 62% higher leakage probability after unit restart. Single-unit two-stage refrigeration compressor interstage flange gaskets bear intermediate pressure; gasket failure causes gas cross-leakage between low and high stage and reduces overall efficiency. Cascade unit high-stage reciprocating refrigeration compressor gaskets work under higher temperature; high temperature accelerates organic gasket material aging and shortening service life.

FAQ

Q1: What principle shall be followed to select reciprocating compressor gasket material? A1: Gasket material must match the refrigerant and lubricant type of the system. Q2: What is the standard gasket replacement rule for Xiteliduo reciprocating compressor? A2: Replace at 8000 running hours or 2 years, whichever condition is reached earlier. Q3: What leads to cylinder head gasket leakage of small 4-cyl reciprocating refrigeration compressor? A3: Repeated thermal cycling causes gasket compression relaxation. Q4: What is the typical early sign of medium 4-cyl reciprocating compressor crankcase gasket leakage? A4: Oil mist escapes and accumulates into oil stains on compressor casing. Q5: What mistake will lead to gasket sealing failure for large 6-cyl reciprocating compressor during reassembly? A5: Cylinder head bolts tightened with uneven torque. Q6: What risk exists if old gaskets are reused during compressor overhaul? A6: Reused gaskets have a 62% higher chance of leakage after restart. Q7: What consequence will interstage gasket failure bring to single-unit two-stage refrigeration compressor? A7: Cross gas leakage between low and high pressure stage and overall efficiency drop.