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Graco 181978 Piston Seal

The Graco 181978 Piston Seal is a premium OEM seal that prevents fluid bypass and maintains consistent pressure within pump cylinders. :contentReference[oaicite:15]{index=15}

  • UHMWPE piston seal
  • Prevents fluid bypass
  • Fits Graco 400‑series pumps
  • Improves pressure stability
  • OEM quality material
  • Durable & chemical resistant

Retail Price: $79.25
You save: $1.38 (1.74%)
Our Price: $77.87
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Compatible Machines for Graco 181978 Piston Seal

  • Graco “Glutton” 400‑series air‑powered pumps
  • High‑pressure industrial fluid pumps
  • Professional coating & transfer systems
  • Pump rebuild applications

Product Overview

The Graco 181978 Piston Seal is a genuine OEM UHMWPE seal engineered to prevent fluid bypass in pump cylinders, ensuring smooth piston travel and consistent pressure delivery. :contentReference[oaicite:11]{index=11}

Key Features

Part Number 181978
Type Piston seal
Material UHMWPE (Ultra‑High Molecular Weight Polyethylene)
Function Seals piston to prevent fluid bypass

Benefits

  • Improves pressure retention
  • Reduces fluid bypass around piston
  • Durable chemical‑resistant material
  • OEM quality performance

Frequently Asked Questions

It prevents fluid from bypassing the piston, ensuring smooth, efficient pump cycles. :contentReference[oaicite:12]{index=12}

Yes, it’s a genuine Graco OEM piston seal. :contentReference[oaicite:13]{index=13}

Replace when worn or pump performance drops. :contentReference[oaicite:14]{index=14}

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