Value Collection ZMSCE70329 Epdm O-ring Dash 329 Pack 25

Product Description

The VALUE COLLECTION ZMSCE70329 is a Dash 329 EPDM O-ring engineered for sealing applications that involve hot water, steam, and phosphate ester hydraulic fluids. The ring features a round cross section with a 2-inch inside diameter, a 2.375-inch outside diameter, and a 3/16-inch thickness (0.1875 inches). Shore A hardness is rated at 70, placing it in the hard hardness category. EPDM construction provides broad chemical resistance and reliable performance across a wide temperature range, making this O-ring a dependable choice for plumbing, HVAC hydronic systems, and industrial fluid sealing tasks.

This O-ring is suited for residential and commercial applications where hot water or steam service is the primary sealing requirement. It is also well established in hydraulic systems that use phosphate ester-based fluids, including commercial aircraft hydraulic circuits where resistance to Skydrol-type fluids is required. Licensed plumbers, HVAC technicians working on hydronic heating systems, and industrial maintenance professionals are the primary installers. Each package contains 25 pieces, allowing for bulk replacement or stocking of a commonly used seal size.

Key Features

• EPDM material delivers excellent resistance to hot water and steam service
• Compatible with phosphate ester hydraulic fluids, including Skydrol-type fluids used in commercial aircraft systems
• 70 Shore A hardness rating for firm, reliable sealing under pressure
• Round cross section, Dash 329 standard sizing for consistent fit
• Operating temperature range of -65 degrees F to 300 degrees F
• Sold in a 25-piece pack to support maintenance stocking needs

Compatibility

Compatible sealing media include hot water, steam, and phosphate ester hydraulic fluids. Suitable for use in systems where EPDM chemical compatibility has been confirmed by the system designer or equipment manufacturer.

Installation Notes

O-ring installation should be performed by a qualified plumber, HVAC technician, or industrial maintenance professional after fully depressurizing and, where applicable, draining the system. Inspect the seating groove for burrs, corrosion, or debris before installing a new ring. Lubricate the O-ring with a fluid compatible with EPDM and the system medium prior to seating. Avoid using petroleum-based lubricants, as they degrade EPDM elastomers.