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The VALUE COLLECTION ZMSCS70FDA331 is a Dash 331 silicone O-ring designed for static and dynamic sealing applications across a wide range of industries. It features a round cross section with a 2.225-inch inside diameter, a 2.625-inch outside diameter, and a 0.1875-inch (3/16 inches) thickness. The silicone compound is rated at 70 Shore A hardness and carries FDA compliance for use in food processing, pharmaceutical, and sanitary systems. Rated for service from -80 degrees F to 450 degrees F, this O-ring is well suited to applications requiring broad thermal range capability and reliable dry heat resistance. Plumbers, pipefitters, and maintenance technicians working with FDA-regulated equipment commonly specify this seal.
This O-ring is appropriate for use in residential and commercial systems where sealing against oils, chemicals, and solvents is required with moderate exposure. Its silicone material provides good weather and ozone resistance, making it a practical choice for outdoor or exposed equipment. It is frequently installed in pump housings, valve bodies, flanged connections, and fluid handling assemblies. Its FDA-compliant material makes it suitable for potable water, food contact, and pharmaceutical process equipment where material traceability is required. Note that oil resistance is limited, so this seal should not be specified for high oil-concentration environments without confirming compatibility.
Designed as a standard Dash 331 O-ring replacement for use in pump housings, valve bodies, and fluid system components requiring an FDA-compliant silicone seal with a 2.225-inch inside diameter and 0.1875-inch cross section thickness.
O-ring installation should be performed by a qualified plumber, pipefitter, or maintenance technician following system shutdown and full pressure relief before disassembly. Ensure the seating groove is clean and free of debris before seating the O-ring. Avoid twisting or rolling the O-ring during installation, as this can cause premature sealing failure. Consult applicable plumbing or process codes such as the IPC or applicable FDA equipment standards when installing in regulated systems.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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