Product Name: Check Valve Seat (Part No. 300640)

Description:
This component is a check valve seat, specifically designed for high-pressure waterjet cutting systems . It is a precision-machined disc-shaped component manufactured from stainless steel with approximate dimensions of 0.3 inch outer diameter and 3/32 inch inner diameter . The seat serves as the stationary sealing surface within the check valve assembly, working in conjunction with a ceramic ball to create a leak-tight, one-way seal that controls water flow into the intensifier cylinder and prevents dangerous backflow .

Applications:

• Installed in the inlet and outlet check valve assemblies of waterjet intensifier pumps 

• Used in OMAX EnduroMAX and Maxiem direct drive waterjet pumps 

• Compatible with MAXIEM and V-Pump systems 

• Suitable for ultra-high pressure waterjet systems operating at 60,000 PSI and above

Features:

• Stainless Steel Construction: Provides excellent corrosion resistance and durability under extreme pressure cycling 

• Precision Dimensions: 0.3 inch OD × 3/32 inch ID for proper fit in check valve assemblies

• Critical Wear Component: Designed as a consumable part requiring periodic replacement

• Direct OEM Replacement: Interchangeable with OMAX #300640 

• Standard Kit Component: Included as a core component in check valve repair kits 

Maintenance:

Failure Diagnosis:

• Pressure Drop: Inability to maintain rated cutting pressure is a primary indicator of seat wear

• Localized Overheating: A check valve body that becomes noticeably hot indicates internal leakage through a worn seat

• Uneven Pump Cycling: Faster piston movement in one direction suggests seat or ball wear

• Visible Wear: During disassembly, inspect the seat sealing surface for pitting, erosion, grooving, or indentation from the ceramic ball

Replacement Guidelines:

• Replace as a Set: The seat and ceramic ball (P/N 200904) form a matched sealing pair. Always replace both components simultaneously 

• Scheduled Replacement: Check valve seats should be replaced during scheduled preventive maintenance (typically every 800-1,500 operating hours)

• Complete Kit Replacement: This seat is available as part of check valve repair kits (P/N 301353 / WO040005), which include (6) seats, (6) ceramic balls, (12) screws, and (12) seals 

• Clean Installation: Thoroughly clean the valve body cavity before installing a new seat

• Full Depressurization: Always fully depressurize the waterjet system and follow lockout/tagout procedures before servicing

• Torque Compliance: When reinstalling the check valve retainer nut, tighten to the specified torque value

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