lightweight and balanced for comfort

This is an air cap retaining ring

Thrust Collar

The 24W216 PVDF Fluid Cover Kit from Graco that includes:

Graco ChemSafe 1040 SHAFT, diaphragm 2.2 mm lightweight and balanced for comfortGracos ChemSafe pumps feature PTFE or UHMWPE (ultra high molecular weight polyethylene) corrosion resistant fluid paths, which make them ideal for corrosive and abrasive chemicals. Theres no exposed metals and they can be configured in various materials to meet most abrasion, temperature, and chemical compatibility requirements. Plus theyre dead head capable and achieve high flow rates while minimizing air consumption and operational noise.