ASAB DDP18 Replacement Parts #30 - PTFE Sealing O-Ring

Part Code: ASAB-SDDP18-30

Introducing the ASAB DDP18 PTFE Sealing O-Ring — a high-chemical-resistance sealing component designed to maintain leak-free performance in ASAB DDP18 double diaphragm pump assemblies. Made from PTFE + Teflon, this seal is ideal for tougher fluids and solvents where standard elastomer O-rings can swell, soften, or degrade over time.

A PTFE sealing O-ring is commonly used in areas where you need maximum chemical compatibility and consistent sealing under cycling load. If you’re seeing weeping at housings, loss of prime stability, or repeat seal failures (especially after solvent duty), replacing the seal with the correct PTFE spec is often the right move to restore reliability.

Whether you’re doing a wet-end rebuild, upgrading seals for solvent service, or fixing a minor leak before it becomes downtime, the ASAB-SDDP18-30 is the right part to keep your DDP18 sealing properly.

Key Benefits

• Direct replacement PTFE sealing O-ring for ASAB DDP18

• Excellent chemical resistance for solvents and aggressive materials

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

• Reduces risk of seal failure from swelling/softening seen with standard elastomers

• Ideal for service rebuilds and preventative maintenance

• Supports stable prime and consistent pump performance under load

• Workshop-ready spare for fast turnaround repairs

What’s Included

• DDP18 PTFE Sealing O-Ring — ASAB-SDDP18-30

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.

• Handle PTFE carefully: PTFE seals can nick if dragged over threads or sharp edges — keep it clean and avoid sharp tools.

• 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 and creating a leak path.

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

ASAB – Engineered for Performance, Built to Last.