Graco 115666 Packing U-Cup Viton

The Graco 115666 Packing U‑Cup Viton gives a robust, chemical‑resistant seal for pistons or shafts in pumps or spray systems — preventing leaks and ensuring smooth, reliable operation.

U‑cup seal with dual‑lip design for dynamic & static sealing
Made of Viton — resistant to chemicals, solvents and abrasion
Used in Graco diaphragm pumps, airless sprayers and fluid‑handling equipment requiring reliable fluid sealing

$14.38

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Description

Compatible Systems for Graco 115666 Packing U‑Cup Viton

The Graco 115666 Packing U‑Cup Viton is a high‑quality U‑cup seal designed to provide reliable sealing in pumps, cylinders, and fluid‑handling assemblies — preventing fluid or air leakage and ensuring smooth operation under pressure or chemical exposure.

Graco diaphragm pumps and fluid‑handling systems where U‑cup seal 115666 is specified
Airless sprayers, coating or paint‑spray equipment with piston/rod assemblies requiring chemical‑resistant seals
Any Graco pump/valve/cylinder assembly dealing with fluids, chemicals or solvents — demanding a durable Viton U‑cup seal

Frequently Asked Questions

A U‑cup seal has a “U‑shaped” cross‑section with dual lips — one lip seals against the housing (static), and the other seals around the piston/rod (dynamic). As pressure increases, the seal lips energize — creating tighter sealing and preventing leaks. :contentReference[oaicite:6]{index=6}

Viton (fluoropolymer elastomer) offers excellent chemical resistance, heat and abrasion resistance — ideal for demanding environments like paint/pump systems that handle solvents, coatings or high‑pressure fluids. :contentReference[oaicite:7]{index=7}

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Graco 115666 Packing U-Cup Viton

Compatible Systems for Graco 115666 Packing U‑Cup Viton

Frequently Asked Questions

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Graco 115666 Packing U-Cup Viton

Compatible Systems for Graco 115666 Packing U‑Cup Viton

Frequently Asked Questions

What is a “U‑Cup” seal and how does it work?

Why Viton material is used for this packing?

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