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
Aro fluid end repair kit in clear bag with PTFE check balls, diaphragms, O-rings and seals

Aro

Aro 637373-TT Fluid End Repair Kit PTFE Ball 4 Check Balls 4 Diaphragms 20 O-Rings 28 Seals 120 psi

SKU CH-BN5A-53NC3

Fluid end repair kit with four PTFE check balls, four PTFE diaphragms, 20 O-rings and 28 seals rated to 120 psi

  • PTFE check balls resist chemical attack
  • Four diaphragms restore pump sealing
  • Twenty O-rings prevent fluid leaks
  • Twenty-eight seals cover all critical joints
  • Rated for 120 psi maximum intake pressure

ARO 637373-TT Fluid End Repair Kit

The ARO 637373-TT kit provides a complete set of replacement components for servicing compatible fluid end assemblies. It contains four PTFE check balls, four PTFE diaphragms, twenty O-rings and twenty-eight seals. Maintenance teams use this kit to restore sealing performance on supported pump models without sourcing individual parts.

Maximum media intake pressure 120 psi

The kit is rated for a maximum media intake pressure of 120 psi, which determines whether it matches the operating envelope of the target pump. Installers must verify that the pump’s specified intake pressure does not exceed this value before proceeding with the repair. Pumps requiring a higher pressure rating cannot use this kit.

Bundled PTFE check balls and diaphragms

The four PTFE check balls and four PTFE diaphragms deliver chemical compatibility and low-friction operation for the fluid path. Twenty O-rings and twenty-eight seals cover every static sealing point in the fluid end, allowing a full rebuild from a single package. This reduces parts handling and ensures material consistency across all replaced components.

Highlights

  • PTFE check balls resist chemical attack
  • Four diaphragms restore pump sealing
  • Twenty O-rings prevent fluid leaks
  • Twenty-eight seals cover all critical joints
  • Rated for 120 psi maximum intake pressure

Specifications

BrandARO

Questions about this item

How does the 120 psi pressure rating affect the kit once it is installed in a pump?

The kit is rated for a maximum media intake pressure of 120 psi, so the repaired pump can handle fluid pressures up to that limit without exceeding the components' design range.

What valve type and ball material are used, and how do they determine sealing performance?

The kit uses a ball valve type with PTFE check balls and PTFE diaphragms, providing chemical resistance and a tight seal for compatible fluids in ARO pump models listed.

What pump models does this repair kit fit, and are any special tools needed for installation?

The kit fits ARO models PD20E-FES-PTT, PD20P-FKS-KTT, PD20P-FPS-PTT, PE20P-FKS-KTT-AD0, PE20P-FPS-PTT-A00, PE20P-FPS-PTT-A0L, PE20P-FPS-PTT-AD0, PE20P-FPS-PTT-ADF, PE20P-FPS-PTT-AS0 and Grainger part 6CCR5; no special tools are mentioned.

Also in this aisle

People compared these

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