ARO 637427-ST PTFE/Santoprene Repair Kit, Stainless Balls

Stainless steel check balls are what set the ARO 637427-ST apart from other kits in the 637427 range. Its diaphragms are listed as PTFE/Santoprene. Each pump on its fit list has ST at the end of the fluid portion of its model code, for example PD05P-ARS-PST-B or PD05R-BSS-SST-B.

Parts referenced in this kit's listing include two diaphragms, ARO 93111 and ARO 93465, the stainless ARO 93410-1 ball and the ARO 93265 O-ring.

Signs It Is Time for This Kit

• Process fluid is reaching the muffler or exhaust port.
• Discharge pressure falls off even though the air motor is still shifting normally.
• Seals at the fluid covers or manifolds start to weep after the pump has been opened.

ARO Pumps That Use the 637427-ST

• ARO PD05P-ADS-DST-B
• ARO PD05P-ARS-PST-B
• ARO PD05P-ARS-SST-B
• ARO PD05P-ASS-SST
• ARO PD05R-BSS-SST-B
• ARO PD05R-BAS-SST-B
• ARO PD05A-AAS-SST-B
• ARO PD05R-ASS-SST-B

One more ARO pump model is also listed for this kit.