Yamada 805084 Diaphragm Pump Spool Valve Assembly

Description:

The Yamada 805084 is a C spool valve assembly used in air-operated double diaphragm (AODD) pump systems to control and direct compressed air flow for diaphragm actuation. It is commonly used in Yamada NDP-40, NDP-50, and NDP-80 series pumps where precise pneumatic switching is required for continuous pumping operation. Maintenance teams, OEMs, and integrators purchase this assembly for replacement of worn spool valves, preventative maintenance, and restoration of proper pump cycling and efficiency.

Applications:

The Yamada 805084 C spool valve assembly is used in industrial fluid handling environments where AODD pumps operate under continuous duty. It is commonly deployed in chemical processing, wastewater treatment, coatings, and bulk fluid transfer systems where controlled air distribution ensures consistent diaphragm movement, stable flow output, and reduced system downtime.

Technical Specifications:

• Manufacturer: Yamada Corporation
• Part Number: 805084
• Product Type: C spool valve assembly
• Function: Controls pneumatic air distribution for diaphragm actuation
• Application: AODD diaphragm pumps (NDP-40 / NDP-50 / NDP-80 series)
• Operation: Pneumatic air shifting spool valve
• Components: Spool, sleeve assembly, springs, seals, retainers
• Installation: Internal air valve section of pump
• Compatibility: Yamada diaphragm pump systems
• Construction: Precision-machined metal with sealing elements
• Weight: ~0.37 lbs
• Duty Cycle: Continuous operation
• Status: Active OEM replacement part

Common Replacements:

• Yamada 805085 spool assembly
• Yamada 804378 high-efficiency spool assembly
• Yamada 802971 air valve assembly