Product Name: Water On/Off Valve Body (Part No. 520001555)

Description:
This component is the main valve body for the pneumatic on/off valve assembly, also known as the water switch, in a high-pressure waterjet cutting system . It is a precision-machined housing, typically manufactured from high-strength stainless steel, designed to withstand extreme pressure cycling up to 60,000 PSI (approximately 4,137 bar) . This valve body contains the internal flow passages, precision sealing surfaces, and threaded ports that direct the high-pressure water flow from the pump to the cutting head . As the central fluid control hub, it houses critical consumable components such as the valve stem (poppet), seal seat, and various O-rings and seals .

Applications:

• Serves as the main housing for the pneumatic water on/off valve assembly

• Mounted between the high-pressure water supply line and the cutting head connection

• Controls the start and stop of the ultra-high-pressure waterjet to the cutting head

• Suitable for ultra-high pressure waterjet systems operating at 60,000 PSI (approximately 4,137 bar) 

Features:

• High-Strength Stainless Steel Construction: Provides corrosion resistance and structural integrity under extreme pressure cycling 

• Precision-Machined Internal Passages: Features cross-drilled flow ports for efficient water direction with minimal pressure loss

• Standard High-Pressure Threads: Equipped with industry-standard HP threads for secure connection to glands, fittings, and cutting head components

• Leak-Tight Sealing Surfaces: Precision-machined seats ensure proper sealing with valve stem and seal assemblies 

• Replaceable Internal Components: Designed to accept wear parts (valve stem, seals, seats) without replacing the entire valve body 

Maintenance:

• Inspect for Leaks: Regularly check the valve body connections for signs of high-pressure water weepage or external leakage 

• Internal Cleaning: During valve overhaul, clean internal flow passages thoroughly using low-pressure water and soft brushes. Remove all debris, mineral deposits, and old seal residue. Do not use metal tools that could scratch sealing surfaces

• Thread Inspection: Check all threaded ports for wear, galling, or deformation. Damaged threads can cause high-pressure leaks

• Seal Replacement: Always replace all O-rings, backup rings, and seal assemblies when servicing the valve body 

• Torque Compliance: Tighten all connections (gland nuts, fittings) to the specific torque values listed in the equipment service manual

• Thread Lubrication: Apply high-pressure thread lubricant or anti-seize compound to threads during reassembly to prevent galling 

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

• Replacement Criteria: Replace the valve body if cracks, severe corrosion, internal erosion, or thread damage is detected. Do not attempt to repair a cracked or severely eroded valve body