ASAB DDP18 Replacement Parts #13 - Diaphragm Pad

Part Code: ASAB-SDDP18-13

Introducing the ASAB DDP18 Diaphragm Pad — a key internal support component used in DDP18 double diaphragm pump assemblies to help distribute load, stabilise the diaphragm stack, and maintain consistent sealing and movement during operation. When the pump is cycling hard, this pad plays an important role in keeping the diaphragm clamped correctly and reducing uneven stress that can lead to premature wear.

A damaged, deformed, or worn diaphragm pad can contribute to issues like inconsistent stroke, reduced efficiency, premature diaphragm fatigue, or sealing problems (depending on where it sits in the assembly). Replacing the pad during a diaphragm service is smart workshop practice — it helps ensure the new diaphragm set beds in correctly and the pump runs smooth and reliable.

Whether you’re doing a full wet-end rebuild, replacing diaphragms, or chasing reliability on a pump that’s been working overtime, the ASAB DDP18 Diaphragm Pad is the right part to keep your DDP18 running properly.

Key Benefits

• Direct replacement diaphragm pad for ASAB DDP18

• Supports correct diaphragm clamping and load distribution

• Helps reduce uneven stress that can shorten diaphragm life

• Ideal to replace during diaphragm changes / wet-end services

• Supports smoother cycling and more consistent pump efficiency

• Helps prevent repeat issues caused by worn or deformed support components

• Workshop-ready spare for fast turnaround repairs

What’s Included

• DDP18 Diaphragm Pad — ASAB-SDDP18-13

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.

• Mark orientation during strip-down: Keep parts in order and note pad/diaphragm stack orientation to avoid incorrect reassembly.

• Inspect sealing faces: Clean and check housings/plates for scoring or damage that can cause leaks even with new parts.

• Even tightening: Reassemble using a cross-pattern and correct torque (don’t crank one side down first).

• Test gradually: Bring air pressure up slowly and check for leaks/odd cycling before returning to full service.

ASAB – Engineered for Performance, Built to Last.