Leak-Free Mating Surfaces

All Yamada pumps incorporate bolted construction, which eliminates leaks and simplifies reassembly after maintenance. Many competitors use clamp band construction, which frequently requires frustrating and unnecessary rebuilds due to leakage from misalignment during reassembly.

Outside Access Air Valve

Inspection or maintenance of every Yamada air valve may be performed without removing the pump from service.

Unified Air Valve Concept

Common-size air valve assemblies reduce parts confusion.

Pilot Valve

Unique to the Yamada design is an individual modular pilot valve that actuates the air valve. It is depressed slightly by the inner center disc creating a pressure drop at one end of the air valve, allowing shifting to occur. It is maintenance free eith no cumbersome snap rings or lubricated dynamic o-rings to replace or repair.

Diphragm Dynamics

Extensive research has led to the development of an optimal stroke length that maximizes diaphragm life and performance while minimizing downtime and maintenance costs.

Non-Metallic Components

Yamada engineers utilize state-of-the-art solid modeling and finite element analysis techniques, including rib and shell methods of injection molding to design non-metallic parts structure. This "patented" technique greatly increases the component strength and reduces material usage.

NDP-40, 50, & 80 Series Non-Metallic Pump Base

The tubular 304 stainless steel base was designed to simplify rebuilding procedures and to absorb weight distribution. maintenance operations are streamlines by mounting the base directly to the air motor so that the pump can sit upright on a workbench for most of the service. the radially bent tubular steel base is rated to 85,000 PSI giving it exceptional strength vs. welded angle designs.