A2077154 – O-Ring, -011, EP

The AqMatic A2077154 is an EP elastomer O-ring in -011 sizing, used in diaphragm valve assemblies and internal rebuild kits for water treatment, filtration, and industrial flow control systems.

This O-ring functions as a sealing component within the valve assembly, helping maintain pressure separation between internal chambers during valve cycling. In diaphragm valve systems, proper sealing is critical for reliable pilot control, diaphragm response, and prevention of internal leakage.

The A2077154 configuration uses EP elastomer (EPDM), a material commonly selected for water treatment applications because of its resistance to water, ozone, and many treatment chemicals. EPDM sealing components are frequently used where Buna compounds may not provide the desired chemical compatibility or environmental resistance.

The -011 sizing corresponds to a specific groove and sealing profile used within AqMatic valve assemblies and adapter kits. Proper sizing is important because incorrect O-ring dimensions can affect pressure retention, valve timing, and diaphragm movement.

This component is commonly replaced during rebuilds alongside diaphragms, springs, and internal hardware in systems using V42 diaphragm valves, K53 series valves, and automated sequencing systems controlled through stagers.