ASAB DDP18 Replacement Parts #18 - Air Valve Plate

Part Code: ASAB-SDDP18-18

Introducing the ASAB Air Valve Plate — a critical air-side component designed to restore smooth, reliable shifting in ASAB DDP18 Double Diaphragm Pumps. The air valve plate forms part of the valve face that manages air distribution and spool/slider operation, helping the pump cycle cleanly and maintain consistent performance under varying loads.

A worn, scored, or damaged air valve plate can cause all the usual air-end headaches: stalling at end of stroke, erratic cycling, reduced speed/output, air leaks, or “chattering”/hunting. Replacing the valve plate during an air valve service helps bring back crisp shifting, reduces air loss, and prevents repeat failures caused by poor sealing surfaces.

Whether you’re doing a full air valve rebuild, chasing a pump that’s stalling, or refreshing wear parts during scheduled maintenance, the ASAB Air Valve Plate is the right part to keep your DDP18 cycling properly.

Key Benefits

• Direct replacement air valve plate for ASAB DDP18

• Supports correct air distribution and valve shifting for smooth cycling

• Helps fix symptoms like stalling, chattering, erratic cycling, and poor output

• Restores sealing surfaces to reduce air leakage and efficiency loss

• Ideal for air valve rebuilds and preventative maintenance

• Helps extend service life of related air-end components by restoring proper contact surfaces

• Workshop-ready spare for fast turnaround repairs

What’s Included

• DDP18 Air Valve Plate — ASAB-SDDP18-18

Safety Check

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

• Lock-out/tag-out if on a plant system: Don’t rely on a single valve—verify zero pressure.

• Keep air-end clean: Dirt or scoring on valve faces will cause immediate repeat issues—clean parts and work on a lint-free surface.

• Check mating parts: Inspect spool/slider, seals, and valve body for scoring or wear while you’re in there.

• Correct fastener torque: Tighten evenly in a cross pattern—over-tightening can distort valve faces and cause sticking.

• Test gradually: Reconnect air and bring pressure up slowly, checking for leaks and smooth cycling before returning to full service.

ASAB – Engineered for Performance, Built to Last.