Flap Mounted Door Dam (Midmark/Ritter M9)

When your Midmark/Ritter M9 autoclave starts losing steam pressure or failing spore tests, a worn door dam is often the culprit. This replacement Flap Mounted Door Dam restores the airtight seal your sterilizer needs to reach and maintain proper sterilization temperatures — getting your autoclave back in service fast and keeping your practice compliant.

Made from durable silicone rubber and designed specifically for the flap-mount style found on M9 and M9D models, this is a direct OEM-compatible replacement at a fraction of the OEM price.

Key Benefits:

• Restores Proper Seal: Eliminates steam leaks that cause failed cycles and spore test failures
• OEM-Compatible: Replaces OEM Part #053-0508-00 (dam gasket only) and #002-0361-00 (door and dam gasket)
• Silicone Rubber Construction: Withstands repeated high-heat autoclave cycles without cracking or deforming
• Flap-Mount Design: Secured by metal flap — installs without special tools
• Fits M9 & M9D Models: Confirmed compatibility with both Midmark/Ritter M9 autoclaves

Compatibility:

• Autoclave Brand: Midmark / Ritter
• Model: M9 and M9D
• Mount Type: Flap-mounted (held in place by metal flap)
• OEM Part Numbers: 053-0508-00 (dam gasket only) / 002-0361-00 (door and dam gasket)
• Material: Silicone rubber

⚠️ Important — Check Your Mount Type: This door dam is designed for units where the dam is held in place by a metal flap. If your M9 uses 2 pins to secure the door dam, you need the #DG-35 Pin Mount Door Dam instead. Check your existing dam before ordering.

Signs Your Door Dam Needs Replacement:

• Visible steam escaping around the autoclave door during a cycle
• Autoclave failing to reach or hold proper pressure/temperature
• Failed biological spore tests with no other obvious cause
• Door dam appears cracked, flattened, hardened, or deformed
• Autoclave displaying error codes related to pressure or door seal
• Cycle times increasing without explanation

How to Install:

1. Power down and unplug the autoclave — allow it to cool completely before servicing
2. Open the autoclave door and locate the existing door dam along the door frame
3. Release the metal flap securing the old door dam
4. Remove the worn door dam and clean the channel thoroughly
5. Seat the new door dam into the channel, ensuring it sits evenly with no gaps
6. Re-engage the metal flap to lock the dam in place
7. Run a test cycle and verify no steam leaks before returning to service
8. Run a biological spore test to confirm sterilization efficacy after repair

Pro Practice Tip: Keep a spare door dam on hand. Door dams are a wear item — having a replacement ready means zero downtime when yours fails. Most practices replace their door dam every 12–18 months as part of routine preventive maintenance.

Product Specifications:

• Material: Silicone rubber
• Mount Style: Flap-mounted
• OEM Equivalent: #053-0508-00 / #002-0361-00