ASAB DDP18 Replacement Parts #16 - Sealing O-Ring

Part Code: ASAB-SDDP18-16

Introducing the ASAB DDP18 Sealing O-Ring — a key seal component designed to maintain leak-free performance in ASAB DDP18 Double Diaphragm Pump assemblies. This O-ring is used to prevent bypass and weeping at critical interfaces, helping the pump hold pressure, maintain prime, and run consistently without mess or air/product cross-leak issues (depending on its position in the stack).

A sealing O-ring that’s flattened, nicked, swollen, or chemically attacked is a common culprit behind slow priming, pressure instability, drips at housings, or wet-end seepage. Replacing it during servicing is cheap insurance and often the difference between a pump that behaves and one that’s back on the bench next week.

Whether you’re doing preventative maintenance, rebuilding the wet end, or chasing a minor leak before it becomes a full-blown downtime event, the ASAB DDP18 Sealing O-Ring 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 prime 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-SDDP18-16

Safety Check

• Isolate and depressurise first: Shut off air supply, bleed the air line 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 threads or edges; use compatible lubricant if required.

• Inspect sealing faces and grooves: 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 operation.

ASAB – Engineered for Performance, Built to Last.