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Graco 102921 Seal

The Graco 102921 Seal is a durable polyurethane V-Block Seal designed to prevent fluid leakage in Graco spray guns and valve assemblies.

  • Part Number: 102921
  • Material: Polyurethane
  • Size: 0.375" OD × 0.125" ID
  • Used in: Graco Pistol Grip Flow Gun models 235-627, 237-607, 237-649

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Technical Overview & Fitment for the Graco 102921 Seal

Compatible Machines

  • Graco Pistol Grip Flow Gun 235-627
  • Graco Pistol Grip Flow Gun 237-607
  • Graco Pistol Grip Flow Gun 237-649
  • Other Graco spray guns / valve assemblies that specify 102921 — verify with your parts diagram.

What It Is

The Graco 102921 Seal is a V-Block (V-vee) Seal designed for fluid/valve sections in select Graco spray guns. Constructed from polyurethane, it helps prevent leakage around the valve stem in high-pressure applications.

Key Specifications

Part Number 102921
Common Name Seal, blk VEE / V-Block Seal
Material Polyurethane
Approx. Dimensions 0.375" OD × 0.125" ID (reference size; confirm in your manual)
Typical Location Valve / trigger body area of compatible Graco spray guns

Features & Benefits

  • Genuine Graco V-Block geometry for reliable sealing under pressure
  • Durable polyurethane for wear resistance and long service life
  • Sized to match assemblies that call for 102921
  • Helps restore proper shutoff and reduce fluid bypass at the valve

Frequently Asked Questions

Check the exploded parts diagram for your sprayer or gun. If the diagram specifies Graco 102921 Seal, the fit is confirmed. Cross-check dimensions (0.375" OD × 0.125" ID) where provided.

Typically in the valve/trigger section of compatible Graco spray guns to prevent fluid leakage around the valve stem or seat.

Using an incorrect size or material can lead to leaks or premature wear. Use only the exact 102921 part or the kit specified by your manual.

Replace if you observe fluid bypass past the valve, difficulty achieving shutoff, or as part of scheduled maintenance during a gun rebuild.

Some valve or gun repair kits include this V-Block seal. Refer to your model’s kit bill of materials to confirm inclusion.

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