ASAB DDP18 Replacement Parts #21 - Valve Gasket

Part Code: ASAB-SDDP18-21

Introducing the ASAB DDP18 Valve Gasket — a critical sealing gasket designed to maintain a leak-free seal around the valve section of the ASAB DDP18 Double Diaphragm Pump. This gasket helps prevent bypass and weeping at the valve housing interface, supporting consistent prime, stable flow, and proper valve function under cycling load.

A valve gasket that’s flattened, torn, nicked, or chemically attacked is a common cause of drips at the valve block, loss of prime, reduced efficiency, or inconsistent pumping (often worse after a clean-out or rebuild if the old gasket gets reused). Replacing the gasket during any valve service is cheap insurance — it keeps sealing faces tight and helps stop debris or air ingress from creating bigger problems downstream.

Whether you’re rebuilding the wet end, servicing the check valves, or chasing a small leak before it turns into downtime, the ASAB-SDDP18-21 is the right part to keep your DDP18 sealing properly.

Key Benefits

• Direct replacement valve gasket for ASAB DDP18

• Helps prevent weeping/leaks at the valve section sealing interface

• Supports stable prime and consistent flow by maintaining proper sealing

• Ideal to replace during valve services, clean-outs, and rebuilds

• Prevents repeat issues caused by reusing crushed or damaged gaskets

• Helps protect valve performance by reducing risk of air ingress/bypass

• Workshop-ready spare for fast turnaround repairs

What’s Included

• DDP18 Valve Gasket — ASAB-SDDP18-21

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 — product can remain trapped in valve chambers.

• Clean sealing faces properly: Remove old gasket material and debris; a dirty face will leak even with a new gasket.

• Inspect the valve block: Check for scoring, warping, or cracked housings — a gasket can’t fix damaged metal/plastic.

• Even tightening: Reassemble using a cross-pattern and correct torque to avoid pinching the gasket or warping the valve block.

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

ASAB – Engineered for Performance, Built to Last.