ARO 637140-44 PTFE/Santoprene Diaphragm Pump Kit Assembly

The ARO 637140-44 is a kit assembly for ARO (Ingersoll Rand) double diaphragm pumps whose model numbers end in 44, such as the 66605J-344 and the 666057-444. The diaphragms are PTFE/Santoprene and the balls are listed as Teflon/PTFE, so both wetted wear items carry a PTFE material.

The 44 suffix on the kit mirrors the last two digits of every pump it is listed for, which is a quick way to check you have the right variant before ordering. The catalog gives materials only; no separate component list is published for this kit.

Reasons to Order This Kit

• A diaphragm has failed and product is escaping through the exhaust.
• The PTFE balls no longer close tightly, so the pump loses prime or slips back.
• Your service interval calls for replacing diaphragms and balls together.

Pumps Listed for the 637140-44

• ARO 66605J-344
• ARO 66605K-444
• ARO 66605H-644
• ARO 66605H-244
• ARO 66605J-244
• ARO 666056-244
• ARO 666053-244
• ARO 666057-444

All eight listed pumps are shown above.