We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Small white PTFE check ball for ARO diaphragm pump

Aro

ARO 93278-4 Replacement Ball PTFE 344 6661A3-344-C 2P774 accessory

SKU CH-VA5A-X370D

PTFE check ball for ARO Pro-Series diaphragm pumps, compatible with part numbers 6661A3-344-C and 2P774

  • MaterialHAWA
  • PTFE construction resists chemicals
  • Check-ball design ensures reliable sealing
  • Compatible with ARO Pro-Series diaphragm pumps
  • Matches Grainger part 2P774 and model 6661A3-344-C
  • New Aro replacement part number 93278-4

Replacement PTFE check ball

This ARO replacement check ball uses PTFE material and carries part number 93278-4. It is designed for Pro-Series diaphragm pumps and matches manufacturer reference 6661A3-344-C. The component is supplied new for direct installation.

Verify pump series and part cross-reference

Confirm that your pump belongs to the Pro-Series family before ordering. Cross-reference the unit against Grainger number 2P774 and manufacturer number 6661A3-344-C to ensure correct fit. The ball is specific to ARO diaphragm pumps of this series.

Sealing performance under continuous cycling

PTFE construction provides consistent sealing during repeated diaphragm strokes. The material resists wear from sustained fluid passage and maintains shape under continuous cycling. This supports reliable check-valve operation over extended duty periods.

Highlights

  • PTFE construction resists chemicals
  • Check-ball design ensures reliable sealing
  • Compatible with ARO Pro-Series diaphragm pumps
  • Matches Grainger part 2P774 and model 6661A3-344-C
  • New Aro replacement part number 93278-4

Specifications

MaterialHAWA
BrandARO

Questions about this item

What comes with the ARO 93278-4 replacement ball and do I need to order any extra parts?

The package contains the PTFE check ball only; no additional components are included.

Which version of the check ball matches my ARO Pro-Series diaphragm pump model 6661A3-344-C?

This ball is the direct replacement for part number 93278-4 and cross-references to Grainger 2P774 for that pump model.

How does the PTFE material perform inside a running diaphragm pump?

PTFE resists chemical attack and reduces friction so the ball seats reliably cycle after cycle.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.