Product Name: Check Valve Assembly Kit / Check Valve Repair Kit (Part No. 301353)

Description:
This component is a complete check valve repair kit, specifically designed for the check valve assemblies in high-pressure waterjet intensifier pumps . It is a pre-assembled collection of precision replacement parts used to overhaul and restore the function of both inlet and outlet check valves in OMAX, MAXIEM, V-Pumps, and AccuStream waterjet systems .

The kit contains all the critical wear components required for a full check valve rebuild. According to manufacturer specifications, the kit includes: (6) valve seats (P/N 300640), (6) ceramic balls (P/N 200904), (12) check valve screws (P/N 300734), and (12) small O-rings or seals (P/N 201277) . These components work together to create reliable one-way flow control, preventing dangerous backflow of ultra-high-pressure water during the intensifier pump's compression stroke. The check valve functions using a spring-loaded poppet or ball design that allows water to flow in one direction while automatically sealing against reverse flow when pressure differential reverses .

This kit is classified as an "inspect" component during Minor Maintenance and a "replace" component during Major Maintenance and Overhaul procedures . It is rated for continuous operation at 60,000 PSI (approximately 4,137 bar) and above.

Applications:

• Rebuilds the inlet (low-pressure) and outlet (high-pressure) check valve assemblies in waterjet intensifier pumps 

• Restores the valve's ability to prevent water backflow, protecting the intensifier cylinder and cutting head from pressure loss and damage 

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

• Compatible with OMAX, MAXIEM, V-Pumps, AccuStream, and KMT waterjet intensifier systems 

• Used during scheduled Minor Maintenance, Major Maintenance, and Complete Overhaul procedures 

Features:

• Complete Kit: Contains all necessary components for a full check valve overhaul including (6) seats, (6) ceramic balls, (12) screws, and (12) seals 

• Multi-Brand Compatibility: Interchangeable with OMAX #301353, AccuStream, KMT #80074057, and other OEM equivalents 

• High-Pressure Rating: Engineered for continuous operation at 60,000+ PSI 

• Corrosion-Resistant Components: All parts are manufactured from materials designed to withstand waterjet operating environments

• Comprehensive Overhaul Solution: Allows complete restoration of all check valves in the intensifier pump in one service event

Maintenance:

Failure Diagnosis (Check Valve Symptoms):

• Localized Overheating: If a specific check valve body becomes noticeably hot during operation, it indicates internal leakage and requires immediate service 

• Pressure Loss on One Stroke: If the intensifier builds no pressure when moving in one direction, the corresponding inlet check valve is damaged or worn

• Uneven Cycling Speeds: If the piston moves faster in one direction than the other, a check valve assembly may be compromised

• Inability to Maintain Cutting Pressure: Gradual pressure drop indicates worn check valve components (balls or seats) 

• External Water Leakage: Visible water weeping from the check valve body area indicates seal failure

Replacement and Inspection Procedures:

• Minor Maintenance (Inspect): During Minor Maintenance intervals, inspect the check valve components for wear. The kit components may be inspected but not automatically replaced 

• Major Maintenance (Replace): During Major Maintenance (typically every 4,500–5,000 operating hours), it is recommended to replace the check valve components using this kit 

• Always Replace as a Set: When check valve wear is detected, replace all components in the kit simultaneously. Do not mix new components with old ones, as this compromises sealing integrity

• Clean Installation: Thoroughly clean the check valve body cavity and all sealing surfaces before installing new components. Remove all debris, old seal residue, and mineral deposits

• Lubrication: Apply a thin layer of high-pressure grease to O-rings and seals during installation to prevent dry start-up and ensure proper seating

• Torque Compliance: Tighten the check valve retainer nuts to the specific torque values listed in the equipment service manual

• Full Depressurization: Always fully depressurize the waterjet system (high-pressure water, hydraulic system, and air supply) and follow lockout/tagout procedures before servicing check valves 

• Cross-Reference Part Numbers: Equivalent to OMAX #301353, WO040005, AccuStream check valve repair kit, and KMT #80074057 

Included Components Details:

• 300640 – Valve Seat (6 pieces): The stationary sealing surface for the ceramic ball

• 200904 – Ceramic Ball (6 pieces): The moving sealing element that seats against the valve seat 

• 300734 – Check Valve Screw (12 pieces): Socket head cap screws for securing check valve components

• 201277 – Seal/O-Ring (12 pieces): Elastomeric seals for leak-proof assembly