ASAB DDP42 Replacement Parts #22 - Sealing Ring

Part Code: ASAB-SDDP42-22

Introducing the ASAB DDP42 Sealing Ring — a critical sealing component designed to maintain leak-free performance in ASAB DDP42 double diaphragm pump assemblies. The sealing ring sits at a key interface in the pump stack to prevent weeping, bypassing, and pressure/prime instability, helping the pump maintain consistent output and reliable operation under continuous cycling.

Over time, sealing rings can become flattened, nicked, swollen, or chemically attacked, especially after long service intervals, harsh products, or repeated strip-downs. When the sealing ring is past its prime, you’ll often see persistent seepage at the joint, difficulty holding prime, inconsistent flow, or repeat gasket/O-ring failures because the sealing surfaces can’t stay tight. Replacing the sealing ring during servicing is cheap insurance and a smart move anytime the pump is apart.

Whether you’re doing preventative maintenance, rebuilding the wet end, or fixing a nuisance leak before it turns into downtime, the ASAB DDP42 Sealing Ring is the right part to keep your DDP42 sealing properly.

Key Benefits

• Direct replacement sealing ring for ASAB DDP42

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

• Supports stable priming and consistent pump performance under load

• Ideal for wet-end rebuilds and preventative maintenance

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

• Helps reduce repeat failures caused by poor compression or damaged seals

• Workshop-ready spare for fast turnaround repairs

What’s Included

• DDP42 Sealing Ring — ASAB-SDDP42-22

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 chambers.

• Protect the seal during fitment: Don’t drag the sealing ring across sharp edges or threads; keep it clean and use compatible lubricant if required.

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

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

• Test gradually: Bring air pressure up slowly, check for leaks, then return to operating conditions.

ASAB – Engineered for Performance, Built to Last.