Lanzhou LS Drawworks JC70 Quick Release Valve (116.20.00)

1

116.20.00

Quick Release Valve

1. Internal blockage from hydraulic fluid impurities and debris; 2. Seal leakage leading to pressure loss; 3. Spring fatigue from repeated pressure release cycles, causing slow response.

1. Filter hydraulic fluid regularly to prevent debris buildup; 2. Inspect pressure release response monthly (replace if slower than 0.5 seconds); 3. Avoid overpressurization (do not exceed 25MPa, the valve’s rated pressure).

Integrated hydraulic valve assembly with precision-machined internal components; fully compatible with Lanzhou LS Drawworks JC70 hydraulic system; meets API 7K and GB/T 13852-2018 standards for pressure resistance and response speed.

2

116.20.05

Housing

1. Fatigue cracking from long-term high-pressure hydraulic impact; 2. Corrosion from hydraulic fluid leakage and environmental moisture (drilling mud, salt spray); 3. Wear at cover connection points from repeated assembly/disassembly.

1. Inspect for cracks and fluid leaks monthly; 2. Apply anti-corrosion grease to external surfaces quarterly; 3. Tighten cover fasteners evenly to avoid uneven pressure on the housing.

40Cr alloy steel; one-piece forging structure; precision-machined internal cavity for hydraulic fluid flow; heat-treated for high pressure resistance (rated up to 30MPa); designed to house and protect internal valve components.

3

116.20.01

Cover

1. Deformation from over-tightening fasteners; 2. Wear at the sealing surface leading to hydraulic fluid leakage; 3. Corrosion from environmental contaminants and fluid splashes.

1. Tighten with a torque wrench (15-20 N·m) to avoid deformation; 2. Inspect the sealing surface for scratches before installation; 3. Replace if the sealing surface is damaged to prevent leakage.

Q235B carbon steel; zinc-plated surface for anti-corrosion; precision-machined sealing surface; compatible with the valve housing (116.20.05); designed to seal the internal cavity and prevent hydraulic fluid leakage.

1

116.20.04

Valve

1. Abrasive wear from hydraulic fluid impurities and debris; 2. Deformation from high-pressure impact; 3. Sealing surface damage leading to pressure leakage.

1. Clean the valve seat and sealing surface during each maintenance cycle; 2. Avoid sudden pressure spikes (use pressure regulators); 3. Replace if the valve fails to seal tightly during pressure tests.

Stainless steel (304); precision-ground sealing surface; heat-treated for wear and pressure resistance; designed to control hydraulic fluid flow and enable rapid pressure release in the JC70 quick release valve.

2

116.20.03

Spring

1. Fatigue failure from repeated compression-relaxation cycles; 2. Corrosion from hydraulic fluid contamination (water, debris); 3. Deformation from over-compression or improper installation.

1. Inspect spring elasticity quarterly (replace if it fails to return to original length); 2. Ensure hydraulic fluid is free of water to prevent corrosion; 3. Install correctly to avoid over-compression during valve assembly.

65Mn spring steel; heat-treated for high elasticity and fatigue resistance; corrosion-resistant coating; designed to provide the necessary force for valve opening/closing and rapid pressure release.

3

116.20.02

Oil Seal

1. Wear from contact with moving valve components; 2. Deterioration from high hydraulic fluid temperature (exceeding 80℃); 3. Damage from improper installation (forced fitting).

1. Replace every 6 months or if leakage is detected; 2. Ensure hydraulic fluid temperature stays below 80℃; 3. Install with a seal installer tool to avoid tearing the seal lip.

Nitrile rubber (NBR); oil-resistant and heat-resistant (up to 100℃); precision-machined seal lip; designed to prevent hydraulic fluid leakage between the valve and housing.

4

116.20.06

Washer

1. Wear from pressure between the cover and housing; 2. Deformation from over-tightening fasteners; 3. Corrosion from hydraulic fluid leakage and environmental moisture.

1. Replace after each disassembly to maintain flatness; 2. Use only with the matching cover (116.20.01) to ensure proper fit; 3. Clean the washer surface before installation to remove debris.

Copper-plated carbon steel; precision-machined to ensure flatness; corrosion-resistant; designed to distribute pressure between the cover and housing, protecting the sealing surface and preventing leakage.

Are these quick release valve components only compatible with Lanzhou LS Drawworks JC70?

Yes, all components listed (including the main quick release valve 116.20.00) are exclusively designed and manufactured for Lanzhou LS Drawworks JC70. They are not interchangeable with other drawworks models, as dimensions, pressure rating, and hydraulic compatibility are tailored to the JC70’s hydraulic control system. Using non-matching parts will cause leakage, pressure failure, and safety hazards.

How often should I inspect and maintain the quick release valve (116.20.00)?

Conduct a visual inspection for leaks monthly and test pressure release response. Perform a full maintenance every 3 months: disassemble the valve, clean internal components, inspect the spring, valve, and oil seal for wear, and replace any damaged parts. Replace the oil seal and washer every 6 months as a preventive measure, even if no damage is visible.

What type of hydraulic fluid should I use to ensure the valve works properly?

Use anti-wear hydraulic oil (ISO VG 46) that meets GB/T 11118.1-2011 standards. This oil resists high temperature, reduces component wear, and prevents debris buildup. Avoid mixing different types of hydraulic oil, and replace the oil every 6 months or if it becomes contaminated (visible debris, discoloration).