ASAB DDP18 Replacement Parts #19 - Air Valve Housing

Part Code: ASAB-SDDP18-19

Introducing the ASAB Air Valve Housing — the main air-end body component designed to support and locate the air valve parts in ASAB DDP18 Double Diaphragm Pumps. This housing forms the structure for the valve plate/shift mechanism, sealing interfaces, and air passages that control how the pump cycles, making it a critical part for smooth, reliable operation.

A damaged or worn air valve housing can cause a stack of frustrating issues, including air leaks, poor shifting, stalling, erratic cycling, reduced output, or repeat air valve failures (often from scoring, cracking, warped sealing faces, or damaged threads). Replacing the housing is the correct fix when sealing surfaces won’t clean up, threads are stripped, or the valve face has been chewed out — especially after contamination or a dry, gritty airline has been hammering the air end.

Whether you’re rebuilding a pump that won’t shift properly, fixing persistent air leaks, or restoring a unit that’s been run hard in rough conditions, the ASAB Air Valve Housing is the right part to get your DDP18 air valve assembly back to proper, job-ready condition.

Key Benefits

• Direct replacement air valve housing for ASAB DDP18

• Restores correct alignment and support for air valve components

• Helps resolve issues like air leaks, stalling, erratic cycling, and poor shifting

• Correct fix when valve faces are scored/warped or threads are damaged

• Supports consistent air distribution for smoother cycling and better efficiency

• Ideal for full air valve rebuilds and major services

• Workshop-ready component for reliable, long-term repair

What’s Included

• DDP18 Air Valve Housing — ASAB-SDDP18-19

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: Verify zero pressure—don’t rely on a single isolation valve.

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

• Inspect mating components: Check valve plate, seals, spool/slider, and fasteners for wear so you’re not bolting worn parts onto a new housing.

• Even tightening only: Tighten bolts evenly in a cross pattern—over-tightening can distort sealing 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.