ASAB DDP18 Replacement Parts #29 - Sealing O-Ring

Part Code: ASAB-SDDP18-29

Introducing the ASAB DDP18 Sealing O-Ring — a critical seal component designed to maintain leak-free performance in ASAB DDP18 Double Diaphragm Pump assemblies. This O-ring is used at key sealing interfaces to prevent weeping, bypassing, and air/product cross-leak symptoms (depending on where it sits in the pump), helping the unit hold prime and run consistently under load.

A sealing O-ring that’s flattened, nicked, swollen, or chemically attacked is a classic cause of small leaks, loss of prime stability, inconsistent output, and messy wet-end seepage — especially after the pump has been stripped and reassembled a few times. Replacing it with the correct part is cheap insurance and often the difference between a pump that behaves and one that’s straight back on the bench.

Whether you’re doing preventative maintenance, rebuilding the wet end, or fixing a minor leak before it turns into downtime, the ASAB-SDDP18-29 is the right part to keep your DDP18 sealing properly.

Key Benefits

• Direct replacement sealing O-ring for ASAB DDP18

• Helps prevent leaks, weeping, and bypassing at sealing interfaces

• Supports stable priming and consistent pump performance

• Ideal for service rebuilds and preventative maintenance

• Restores sealing reliability when old seals are flattened, nicked, or swollen

• Low-cost wear part that helps avoid major downtime

• Workshop-ready spare for fast turnaround repairs

What’s Included

• DDP18 Sealing O-Ring — ASAB-SDDP18-29

Safety Check

• Isolate and depressurise first: Shut off air supply, bleed the airline fully, and confirm the pump is not pressurised before disassembly.

• Chemical exposure: Wear gloves and eye protection — residual product can remain trapped in the fluid chambers.

• Avoid seal damage during fitment: Don’t drag the O-ring over sharp edges/threads; use compatible lubricant if required.

• Inspect sealing grooves and faces: Clean thoroughly and check for scoring, corrosion, or debris that can cause repeat leaks.

• Reassemble evenly: Tighten fasteners in a cross pattern to avoid pinching the seal.

• Test gradually: Bring air pressure up slowly and leak check before returning to full operating conditions.

ASAB – Engineered for Performance, Built to Last.