Discussion Overview
The discussion centers around the capability of hydraulic seals to withstand pressures exceeding 25,000 psi, exploring types of seals suitable for high-pressure applications, particularly in moving seal contexts. Participants share insights on specific seal types, their limitations, and practical considerations for high-pressure systems.
Discussion Character
- Technical explanation
- Debate/contested
Main Points Raised
- One participant notes the highest operating pressure found for hydraulic seals is 11,000 psi, specifically for "vee packing."
- Another participant suggests that HIP's chevron packings can withstand up to 30,000 psi, but emphasizes the need for careful assembly and regular maintenance.
- Concerns are raised about the reliability of high-pressure seals, mentioning issues like slow bleeding and thermal expansion affecting pressure stability.
- A participant confirms the need for a non-static seal for a metal bar that must slide out of a high-pressure container.
- There is a cautionary note regarding the complexity of achieving proper finishes and managing off-axis loads in high-pressure applications.
- One participant inquires about the specific application, mentioning an "ice dilatometer," indicating a potential experimental context.
Areas of Agreement / Disagreement
Participants express varying opinions on the types of seals that can withstand high pressures, with some advocating for chevron packings while others highlight the challenges and limitations associated with high-pressure sealing solutions. The discussion remains unresolved regarding the best approach for achieving reliable high-pressure sealing.
Contextual Notes
Participants mention critical factors such as surface finishes, control of off-axis loads, and the need for positive shut-off valves, which may impact the effectiveness of high-pressure seals.