Our P seals or “Music Note Seals” as they are also known, are available in two different formats. Depending on the load deflection criteria we may suggest either a solid or hollow bulb. The hollow bulb format is more suitable for use in low hydrostatic pressures. While the solid bulb format is less prone to compression.
When under pressure, either the bulb or stem can create a seal. Bulb deflection is appropriate for seals which are in high compression load applications. Whereas, stem deflection is more appropriate for use in; low compression loads, sealing irregular surfaces and large tolerances in the gate dimensions.