Control valve for main drum

1

Reverse valve (Control valve for main drum)

IA480

Valve body: nodular cast iron; Valve core: hardened alloy steel (HRC 58-62); Seals: FKM (Viton)

1. Frequent switching causes wear between valve core and sleeve; 2. Contaminant particles in hydraulic oil lead to valve core jamming and scratch.

1. Ensure hydraulic oil cleanliness (NAS 8 class or higher); replace oil filters regularly; 2. Avoid rapid and frequent switching operations to reduce impact on valve core and seals.

2

Control valve for main drum

IA295

Valve body: aluminum alloy (anodized); Valve core: stainless steel 304; Seals: NBR

1. High hydraulic pressure causes deformation of valve body and seal extrusion; 2. Humid environment leads to valve body corrosion and seal aging.

1. Operate within the rated pressure (≤25 MPa) to avoid valve body deformation; 2. Regularly clean the valve surface and apply anti-corrosion grease in humid environments.

3

Discharge valve

SE-1/2B

Valve body: carbon steel (galvanized); Valve disc: stainless steel 316; Seals: PTFE

1. Pressure fluctuations cause repeated impacts on valve disc, leading to fatigue damage; 2. High-temperature hydraulic oil accelerates seal aging and leakage.

1. Install a pressure stabilizer upstream to reduce pressure fluctuations; 2. Monitor hydraulic oil temperature and avoid operation above 120°C.

4

Shuttle valve

OS-1/4-B

Valve body: brass; Valve core: hardened steel; Seals: FKM (Viton)

1. Uneven pressure distribution causes one-way sealing failure; 2. Small solid particles in oil block the valve core movement channel.

1. Ensure balanced pressure input on both sides during installation; 2. Install a fine filter upstream to prevent contaminant ingress.

5

Toggle valve

FP-L6

Valve body: aluminum alloy; Toggle lever: carbon steel (chrome-plated); Seals: NBR

1. Mechanical wear of toggle lever hinge leads to switching inaccuracy; 2. Dust and debris ingress causes valve core jamming.

1. Regularly lubricate the toggle lever hinge with high-temperature grease; 2. Install a dust cover to protect the valve switching mechanism.

6

Adjustable valve for hand wheel

TMR8-L6

Valve body: carbon steel; Hand wheel: cast iron (rubber-coated); Valve core: alloy steel; Seals: FKM (Viton)

1. Wear of thread pair during frequent adjustment leads to adjustment inaccuracy; 2. Corrosion of thread pair in humid/salt spray environments causes jamming.

1. Rotate the hand wheel smoothly during adjustment; avoid excessive force; 2. Apply anti-corrosion lubricant to the thread pair regularly, especially in offshore environments.

7

Three-way reverse valve with two positions

23JR6-L8

Valve body: nodular cast iron; Valve core: stainless steel 304; Seals: FKM (Viton)

1. Frequent reverse switching causes seal wear and internal leakage; 2. Hydraulic shock leads to valve core deformation.

1. Operate the reverse switch smoothly to reduce hydraulic shock; 2. Inspect the seal for leakage regularly and replace worn seals promptly.

8

Four-way reverse valve with three positions

34JR6-L8

Valve body: aluminum alloy (anodized); Valve core: hardened alloy steel; Seals: NBR

1. Complex switching logic leads to uneven wear of valve core and seals; 2. Low-temperature environment causes seal brittleness and leakage.

1. Pre-heat the hydraulic system to above 0°C before start-up in cold climates; 2. Conduct regular maintenance to check valve core movement flexibility.

9

Air-accumulated valve

VL/0-3-1/2

Valve body: carbon steel; Diaphragm: nitrile rubber; Spring: 65Mn alloy steel

1. Diaphragm wear caused by repeated pressure changes; 2. Air contamination leads to internal corrosion and spring fatigue.

1. Ensure the air source is clean and dry; install an air filter regulator; 2. Inspect the diaphragm for cracks regularly and replace if damaged.

10

Three-link parts

FRC-3/4-D-MIDI-A

Body: aluminum alloy; Seals: FKM (Viton); Connecting rod: carbon steel (zinc-plated)

1. Mechanical wear of connecting rod hinge during frequent movement; 2. Torsional deformation caused by improper installation alignment.

1. Ensure installation alignment; correct misalignment exceeding 0.05mm; 2. Regularly lubricate the hinge with anti-wear grease.

1

Hydraulic pump

IP407

Pump body: aluminum alloy; Rotor: alloy steel (hardened); Vanes: carbon fiber-reinforced PTFE; Bearings: GCr15 steel

1. Contaminant particles in hydraulic oil cause severe wear of rotor and vanes; 2. Insufficient lubrication at start-up leads to dry friction and bearing damage.

1. Use hydraulic oil that meets the specified grade and keep it clean (NAS 7 class or higher); 2. Pre-fill the pump with hydraulic oil before initial start-up to ensure lubrication.

1

Oil filter

LXZ—400X30F

Filter housing: carbon steel (paint-coated); Filter element: glass fiber; Seals: NBR

1. Excessive contaminant accumulation causes filter element clogging and pressure damage; 2. Corrosion of filter housing in humid environments.

1. Regularly check the pressure difference and replace the filter element when the difference exceeds 0.3 MPa; 2. Clean the filter housing regularly and touch up paint on corroded areas.

2

Oil filter

LXZ—400X180F

Filter housing: aluminum alloy; Filter element: stainless steel wire mesh; Seals: FKM (Viton)

1. High-temperature hydraulic oil accelerates seal aging and leakage; 2. Large solid particles impact and damage the filter element.

1. Monitor hydraulic oil temperature and avoid operation above 120°C; 2. Install a coarse filter upstream to pre-filter large particles.