Product Name: Coupling, Bulkhead, .94 x .25 – Part No. 10077055

Description:
This component is a bulkhead coupling, specifically designed for high-pressure waterjet cutting systems . It serves as a specialized fitting that creates a secure, sealed passage for high-pressure water lines through walls, tanks, or partitions within the waterjet system .

The “.94 x .25” designation refers to a .94 inch (approximately 15/16″) threaded connection on one side and a .25 inch (1/4″) connection on the other . This coupling is typically manufactured from high-strength, corrosion-resistant steel to withstand the extreme pressure cycling of waterjet operation (up to 60,000–94,000 PSI / 4,137–6,480 bar) .

According to the official parts diagram for the Bulkhead Pipe Assembly (P/N 72152927), this coupling is listed as Item 3 with a quantity of 1 required per assembly . Bulkhead pipe assemblies are critical in waterjet systems to maintain the integrity of high-pressure water lines, ensuring water reaches the cutting head with the required pressure and flow rate while preventing any leaks that could affect cutting performance .

Applications:

• Serves as a high-pressure bulkhead fitting, creating a sealed passage for water lines through walls, tanks, or partitions

• Used in the Bulkhead Pipe Assembly (P/N 72152927) of waterjet cutting systems

• Maintains water line integrity while preventing leaks and ensuring safe operation under high pressure

• Suitable for 60,000-94,000 PSI (approximately 4,137-6,480 bar) ultra-high pressure waterjet systems

Features:

• Bulkhead Design: Allows high-pressure water lines to pass through walls, tanks, or partitions while maintaining a secure, leak-proof seal

• Dual-Size Configuration: .94 inch (approx. 15/16″) connection on one side and .25 inch (1/4″) connection on the other

• High-Strength Material: Typically manufactured from corrosion-resistant steel to withstand harsh waterjet environments

• Critical System Component: Essential for maintaining the integrity of high-pressure water lines, ensuring proper flow rate and pressure to the cutting head

• Sealing Elements: Works with gaskets or sealing materials to create a watertight seal between the bulkhead fitting and the surrounding structure

• Secure Fastening: Typically includes locknuts or fasteners to secure the fitting in place on both sides of the partition

• Direct OEM Replacement: Interchangeable with manufacturer specifications as listed in the official parts diagram (Item 3 in Assembly 72152927)

Maintenance:

Failure Diagnosis (When to Inspect/Replace):

• External Water Leakage: Visible water weeping from the bulkhead fitting indicates seal failure or thread damage, requiring immediate replacement

• Thread Damage: Stripped, galled, or corroded threads prevent proper tightening and must be replaced immediately

• Cracked or Deformed Body: Any visible cracking or distortion of the coupling body warrants immediate replacement

• Pressure Drop: Inability to maintain system pressure may indicate a leaking bulkhead connection

• Scheduled Preventive Maintenance: Inspect bulkhead fittings during major system overhauls and replace if any wear or damage is detected

Inspection and Replacement Guidelines:

• Full Depressurization (Critical): Before any maintenance, place the main electrical disconnect in the OFF position, fully depressurize both the hydraulic system and the high-pressure water system, and follow lockout/tagout procedures

• Thread Preparation: Clean all threads thoroughly with a soft brush and compatible solvent. Remove all debris, old sealant, and corrosion

• Seal Inspection: Inspect the sealing elements (gaskets or O-rings) for nicks, cuts, or hardening. Replace seals with new ones whenever the fitting is disassembled

• Thread Lubrication: Apply a thin, even layer of high-pressure anti-seize lubricant to threads during reassembly to prevent galling and ensure accurate torque application

• Torque Compliance: Tighten the coupling to the specific torque value listed in the equipment service manual using a calibrated torque wrench

• Two-Wrench Method: Use two wrenches — one to counter-hold the coupling body and one to tighten the locknut — to prevent twisting stress on the assembly

• Locknut Security: Ensure locknuts on both sides of the partition are properly torqued to secure the fitting without over-compressing the sealing elements

• Replace if Damaged: Replace the coupling immediately if threads are damaged, the body shows visible cracking or deformation, severe corrosion is present, or persistent leakage occurs despite proper installation with new seals

• Cross-Reference Information: 10077055 is listed as Item 3 in Bulkhead Pipe Assembly 72152927 (Qty 1)

• Storage: Store spare couplings in a clean, dry environment to prevent corrosion and protect threads from damage before use