Value Collection ZMSCNU6226-29 U Cup Seal Buna-n 5 Piece

Product Description

The VALUE COLLECTION ZMSCNU6226-29 is a Buna-N U cup seal used to create a positive fluid seal in hydraulic and pneumatic cylinder applications. The U cup profile flexes under pressure to maintain contact with the bore wall, preventing fluid bypass in single-acting or double-acting configurations. This pack contains 5 seals, each measuring 1-3/4 inches inside diameter and 2-3/8 inches outside diameter. Buna-N (nitrile rubber) construction provides solid resistance to petroleum-based hydraulic fluids, oils, and general industrial fluids. Maintenance technicians and hydraulic system technicians are the typical installers.

U cup seals of this size are commonly used in medium-bore hydraulic cylinders found in industrial equipment, mobile machinery, and fluid power systems. The 1-3/4 inch inside diameter fits standard rod or piston dimensions in that bore range. The 5-piece pack is suited for shop stock, cylinder rebuild kits, or multi-unit service jobs where having spares on hand reduces downtime.

Key Features

• Buna-N material resists petroleum-based hydraulic fluids and oils
• U cup profile maintains sealing contact under system pressure
• 1-3/4 inch inside diameter for standard medium-bore cylinder fitment
• 2-3/8 inch outside diameter for proper housing engagement
• 5-piece pack supports seal replacement across multiple cylinders or as bench stock

Compatibility

Designed as an OEM-style replacement U cup seal for hydraulic and pneumatic cylinders requiring a 1-3/4 inch inside diameter by 2-3/8 inch outside diameter Buna-N U cup profile.

Installation Notes

Hydraulic system technicians and maintenance mechanics typically perform U cup seal replacements. Depressurize and bleed the hydraulic circuit completely before disassembling the cylinder. Inspect the bore, rod, and gland surfaces for scoring before installing new seals, as surface damage will compromise seal life. Install U cups with the lip oriented toward the pressure source to ensure proper sealing action.