Product Name: O-Ring -014 (Part No. 202570)

Description:
This component is an O-ring seal, designated as size -014 (dash number 014), manufactured from 70-durometer nitrile rubber (NBR/Buna-N) . It is designed for use as a sealing component within the high-pressure water on/off valve (water switch) assembly of waterjet cutting systems . This O-ring provides a leak-proof static or dynamic seal between mating valve components, preventing ultra-high-pressure water from bypassing internal passages. It is a critical consumable component rated for operation at 94,000 PSI (approximately 6,480 bar) and is commonly included as a replacement part in water switch valve repair kits .

Applications:

• Seals internal passages within the water on/off valve (water switch) assembly of high-pressure waterjet cutting systems 

• Used in both the intensifier pump and cutting head valve assemblies

• Compatible with waterjet systems operating at pressures up to 94,000 PSI 

• Suitable for OEM systems from AccuStream and FLOW (FLOW福禄) waterjet brands 

Features:

• Nitrile (NBR) Construction: Provides excellent resistance to water, hydraulic fluids, and common water treatment additives; offers good abrasion resistance and mechanical properties 

• 70 Shore A Durometer: Standard hardness rating that balances sealing effectiveness with installation flexibility and wear resistance 

• Standard Dash Number -014: Conforms to AS568 (SAE) industry standard sizing for reliable replacement fitment 

• High-Pressure Capability: Rated for operation up to 94,000 PSI when correctly installed with proper groove design and backup rings 

• Critical Consumable Component: Designed for periodic replacement during valve maintenance to ensure leak-free operation

• OEM Compatibility: Direct replacement for AccuStream and FLOW waterjet O-ring -014 specifications 

Maintenance:

Failure Diagnosis:

• External Water Leakage: Visible water weeping from valve body joints indicates O-ring wear or extrusion

• Pressure Drop: Inability to maintain cutting pressure may indicate seal failure allowing internal bypass

• Hardening or Cracking: Deteriorated O-rings become brittle, cracked, or permanently flattened from compression set and high-pressure exposure

• Extrusion Damage: O-ring extruded into clearance gaps indicates pressure exceeds seal rating or missing backup rings

• Nicks or Cuts: Physical damage during assembly or from abrasive particles compromises sealing integrity

Inspection and Replacement Procedures:

• Always Replace During Valve Service: O-rings are single-use consumable components. Replace with a new O-ring whenever the water on/off valve assembly is disassembled during maintenance

• Clean Groove Thoroughly: Before installing a new O-ring, ensure the gland groove and mating surfaces are completely clean, dry, and free from debris, old seal residue, corrosion, or scratches

• Inspect Groove Condition: Check the groove for sharp edges, burrs, or damage that could cut or abrade the new seal

• Lubrication: Apply a thin, uniform coating of manufacturer-recommended high-pressure grease or silicone-based lubricant to the O-ring during installation to prevent pinching, rolling, or damage during assembly

• Avoid Twisting: Ensure the O-ring is not twisted or pinched in the groove after installation. Use tapered installation tools to prevent distortion

• Verify Backup Ring Presence: At high pressures (60,000+ PSI), ensure proper backup rings are installed adjacent to the O-ring to prevent extrusion

• Proper Sizing Verification: Verify the replacement O-ring matches the original dash number -014 dimensions exactly. An O-ring that is too thick or too thin will not seal properly

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

• Torque Compliance: When reinstalling valve components, tighten all connections to the specific torque values listed in the equipment service manual to ensure proper O-ring compression without over-compression or damage

• Preventive Replacement Schedule: It is standard practice to replace this O-ring during scheduled valve maintenance or whenever the water on/off valve assembly is serviced 

• Storage: Store spare O-rings in a cool, dry environment (15–25°C, humidity <65%) away from direct sunlight, ozone sources, and chemicals to prevent premature aging 

• Cross-Reference Information: This O-ring is also known as Check Valve O-Ring, 94k, and is included in FLOW waterjet valve repair kits