Industrial 770691 Valve Ball

Description:

The Yamada 770691 is a PTFE valve ball used in air-operated double diaphragm (AODD) pump systems to control fluid flow and ensure proper sealing within the pump chamber. It is commonly used in Yamada diaphragm pumps such as the NDP-25 series where chemical resistance and reliable check valve operation are required. Maintenance teams, OEMs, and integrators purchase this component for replacement of worn valve balls, preventative maintenance, and restoring pump efficiency and sealing performance.

Applications:

The Yamada 770691 PTFE ball is used in industrial fluid handling environments where reliable check valve operation is critical. It is commonly deployed in AODD pumps used for chemical transfer, wastewater processing, coatings, and fluid dosing systems where corrosion resistance and consistent sealing are required for proper pump cycling and flow control.

Technical Specifications:

• Manufacturer: Yamada Corporation
• Part Number: 770691
• Product Type: Valve ball / check ball
• Material: PTFE (Teflon)
• Size: ~25T / ~35 mm class
• Function: Controls flow and sealing in diaphragm pump chambers
• Application: AODD diaphragm pumps (e.g., NDP-25 series)
• Chemical Resistance: High (PTFE suitable for aggressive fluids)
• Installation: Internal pump valve assembly
• Weight: ~0.048 kg
• Duty Cycle: Wear component (periodic replacement required)
• Status: Active industrial replacement part

Common Replacements:

• Yamada 770693 (larger PTFE ball variant)
• Yamada 771524 (smaller PTFE ball variant)
• Generic PTFE valve balls (matched size/spec)