Liner Water Retaining Components

1

Liner water retaining device 1

NB004.06.12.00

Carbon steel (Q235) with anti-corrosion plating, integrated structure for cylinder liner water separation

1. Corrosion from long-term water contact; 2. Wear from vibration-induced friction; 3. Deformation from improper installation alignment.

1. Inspect for rust monthly and touch up anti-corrosion coating; 2. Ensure precise alignment during installation; 3. Clean water residues regularly to reduce corrosion.

2

Liner water retaining barrel assembly

NB004.06.12.01.00

Stainless steel (304), precision-machined barrel structure for fluid containment and guidance

1. Internal wear from fluid scouring; 2. Sealing surface damage from debris; 3. Weld fatigue from system vibration.

1. Filter fluids to remove abrasive particles; 2. Inspect welds quarterly for cracks; 3. Flush the barrel monthly to reduce fluid residue buildup.

3

Liner water receiving barrel assembly

NB004.06.12.03.00

Stainless steel (304), designed for water collection and diversion in cylinder liner systems

1. Corrosion from chemical contaminants in water; 2. Clogging from debris accumulation; 3. Deformation from pressure surges.

1. Monitor water quality and remove contaminants; 2. Clean the barrel interior monthly; 3. Avoid sudden pressure spikes in the fluid system.

4

Liner water retaining barrel assembly

NB004.06.13.01.00

Stainless steel (304), identical material and performance to NB004.06.12.01.00 for interchangeable use

1. Wear from misalignment with matching components; 2. Corrosion in high-humidity environments; 3. Surface damage from improper handling during replacement.

1. Verify component alignment before installation; 2. Store in dry areas when not in use; 3. Handle with care to avoid surface scratches.

5

Liner water receiving barrel assembly

NB004.06.13.03.00

Stainless steel (304), compatible with NB004.06.13.01.00 for consistent water collection performance

1. Wear from repeated fluid impact; 2. Sealing edge damage from debris; 3. Corrosion from saltwater (in coastal oilfields).

1. Install a pre-filter to reduce debris; 2. Inspect sealing edges for damage quarterly; 3. Apply anti-corrosion grease in coastal environments.

1

Hexagon bolt: 1/4’’-20×1/2’’

ASME B18.2.1

Alloy steel (8.8 grade), quenched and tempered, compliant with ASME B18.2.1 for light-load fastening

1. Thread wear from repeated assembly; 2. Fatigue fracture from continuous vibration; 3. Corrosion from water seepage.

1. Use torque wrenches (30-35N·m) for precise tightening; 2. Apply thread sealant to prevent water intrusion; 3. Replace if threads are stripped or corroded.

2

Hexagon bolt: 5/16’’-18×5/8’’

ASME B18.2.1

Alloy steel (8.8 grade), higher tensile strength for medium-load fixation of water retaining components

1. Bolt head damage from improper tool use; 2. Thread seizure from corrosion; 3. Over-tightening leading to rod deformation.

1. Use matching hex tools to avoid head stripping; 2. Apply anti-seize agent in wet environments; 3. Tighten to specified torque (45-50N·m).

3

Screw 5/16’’-18×1 5/8’’

ASME B18.3

Alloy steel (8.8 grade), compliant with ASME B18.3 for precise component positioning and fixation

1. Thread wear from misalignment during installation; 2. Fatigue from vibration; 3. Corrosion from high humidity.

1. Align screw holes precisely before installation; 2. Inspect for thread wear monthly; 3. Lubricate threads with anti-rust grease quarterly.

4

Positioning screw

NB004.06.12.02

Carbon steel (45#), precision-threaded for accurate alignment of water retaining components

1. Wear from repeated adjustment; 2. Thread damage from over-tightening; 3. Corrosion from water contact.

1. Adjust only to required positioning torque; 2. Clean threads after adjustment; 3. Apply anti-corrosion coating to exposed parts.

5

Spring washer 8

GB/T93

Spring steel (65Mn), tempered, compliant with GB/T93 for anti-vibration locking of 1/4’’ bolts

1. Elasticity loss from long-term compression; 2. Corrosion leading to breakage; 3. Deformation from excessive bolt torque.

1. Replace every 4 assembly cycles; 2. Store in dry, sealed containers; 3. Match with 1/4’’ bolts to ensure proper compression.

6

Spring washer 10

GB/T93

Spring steel (65Mn), tempered, compliant with GB/T93 for anti-vibration locking of 5/16’’ bolts

1. Fatigue breakage from continuous vibration; 2. Corrosion from water and humidity; 3. Elasticity loss from over-compression.

1. Inspect for cracks monthly; 2. Replace if elasticity decreases; 3. Ensure compatibility with 5/16’’ bolts to avoid misfit.

1

Felt

NB004.06.12.04

Industrial wool felt, oil-impregnated for sealing and dust-proofing in water retaining systems

1. Degradation from long-term water immersion; 2. Clogging from dust and debris; 3. Wear from friction with moving components.

1. Replace every 3 months or if water-soaked; 2. Clean surrounding areas to reduce debris; 3. Reimpregnate with industrial oil quarterly.

2

Felt

NB004.06.13.02

Industrial wool felt, identical to NB004.06.12.04 for interchangeable sealing and buffering

1. Wear from misalignment with matching parts; 2. Deterioration from chemical contaminants; 3. Hardening from dry conditions.

1. Ensure proper fit during installation; 2. Avoid contact with corrosive fluids; 3. Keep felt slightly oiled to prevent hardening.

1

Are NB004.06.12.01.00 and NB004.06.13.01.00 interchangeable?

Yes, both liner water retaining barrel assemblies use 304 stainless steel and have identical dimensions, making them fully interchangeable for NB005.06.00 fluid end assemblies, ensuring consistent performance.

2

How often should felt components be replaced?

Replace felt every 3 months under normal wet working conditions; shorten to 1-2 months in high-humidity or debris-heavy environments. Reimpregnate with industrial oil quarterly to maintain sealing and buffering performance.

3

Can standard ASME B18.2.1 bolts replace the original hexagon bolts?

Yes, as long as the replacement bolts match the size (1/4’’-20×1/2’’, 5/16’’-18×5/8’’) and 8.8 grade, they comply with ASME B18.2.1 and are fully compatible, ensuring reliable fixation.