Parts for Lanzhou LS 3NB500C: Classified Guide

1

Cover

107.15.110.08

Carbon steel (Q235B, surface anti-rust coating)

1. Impact damage from external debris; 2. Corrosion from drilling fluid leakage; 3. Fatigue deformation from long-term vibration.

1. Inspect for cracks monthly; 2. Clean surface regularly to avoid corrosion; 3. Ensure tight fitting with fasteners to reduce vibration.

2

Cover

107.15.110.33

Carbon steel (Q235B, surface anti-rust coating)

1. Wear from internal component friction; 2. Corrosion from humid working environment; 3. Deformation from uneven bolt torque.

1. Tighten bolts evenly per torque standard; 2. Replace if surface wear exceeds 0.3mm; 3. Apply anti-rust paint annually.

3

Valve cover

107.14.110.08

Alloy steel (40Cr, quenched & tempered)

1. High-pressure fluid impact; 2. Corrosion from acidic/alkaline drilling mud; 3. Seal failure leading to internal erosion.

1. Check seal fit before installation; 2. Inspect for erosion marks quarterly; 3. Use compatible anti-corrosion coating.

4

Discharge manifold

107.15.110.01

High-strength alloy steel (16Mn, pressure-resistant)

1. High-pressure fluid scouring; 2. Corrosion from drilling mud; 3. Welding seam fatigue from cyclic pressure.

1. Conduct pressure testing per GB/T 9711-2011; 2. Clean internal passages regularly; 3. Inspect welding seams for cracks monthly.

5

Suction manifold

107.15.111.00

High-strength alloy steel (16Mn, pressure-resistant)

1. Cavitation damage from insufficient suction; 2. Corrosion from sediment in drilling mud; 3. Vibration-induced joint loosening.

1. Ensure stable suction flow; 2. Remove sediment regularly; 3. Tighten joint fasteners weekly.

6

Liner end cover

107.15.110.21

Carbon steel (Q235B, surface galvanized)

1. Wear from liner friction; 2. Corrosion from drilling fluid; 3. Deformation from lock nut over-tightening.

1. Check fit with liner before installation; 2. Torque lock nut per standard; 3. Replace if wear or deformation occurs.

1

Seal valve cover

107.04.110.55

Nitrile rubber (NBR 70, oil-resistant)

1. High-temperature aging; 2. Wear from valve cover movement; 3. Chemical corrosion from drilling fluid additives.

1. Replace every 500 working hours; 2. Clean sealing surface before installation; 3. Avoid over-tightening to prevent deformation.

2

Seal

107.10.110.03

Fluororubber (FKM, high-temperature resistant)

1. Thermal degradation from high operating temperature; 2. Abrasion from impurity particles; 3. Compression fatigue.

1. Ensure operating temperature ≤ 150°C; 2. Use with fluid filters; 3. Replace if compression set exceeds 20%.

3

Seal

107.04.110.21 (155x140x10)

Nitrile rubber (NBR 70, with steel skeleton)

1. Wear from shaft/part rotation; 2. Corrosion from hydraulic oil; 3. Improper installation causing lip damage.

1. Check seal lip for damage before use; 2. Clean mating surface (Ra ≤ 0.8μm); 3. Replace every 600 working hours.

4

Seal

107.15.110.32

Fluororubber (FKM, chemical-resistant)

1. Chemical corrosion from drilling mud; 2. High-pressure fluid impact; 3. Aging from long-term exposure to harsh environments.

1. Verify chemical compatibility with drilling fluid; 2. Inspect for cracks monthly; 3. Replace if leakage occurs.

5

Seal

107.04.110.13 (210x180x15)

Nitrile rubber (NBR 70, with PTFE lip coating)

1. Wear from high-speed rotation; 2. Contamination from debris; 3. Lip damage from sharp edges.

1. Avoid sharp edges during installation; 2. Install debris filters; 3. Replace if lip wear exceeds 0.5mm.

6

Seal

107.04.08

Nitrile rubber (NBR 70, oil-resistant)

1. Aging from long-term storage; 2. Wear from component movement; 3. Oil corrosion leading to brittleness.

1. Store in sealed, dry environment; 2. Inspect for brittleness before use; 3. Replace if elasticity decreases.

7

Seal

107.04.110.45

Fluororubber (FKM, high-pressure resistant)

1. High-pressure fluid extrusion; 2. Chemical corrosion; 3. Wear from mating part friction.

1. Ensure pressure does not exceed rated limit; 2. Check mating part surface for wear; 3. Replace every 500 working hours.

8

Gasket

107.15.110.02

Asbestos-free rubber (NBR + aramid fiber)

1. Compression fatigue; 2. High-temperature aging; 3. Oil corrosion leading to leakage.

1. Do not reuse after disassembly; 2. Ensure uniform compression; 3. Replace if thickness decreases by 15%.

9

Gasket

107.15.110.03

Asbestos-free rubber (NBR + aramid fiber)

1. Vibration-induced edge wear; 2. Moisture softening; 3. Improper storage causing deformation.

1. Store in sealed packaging; 2. Check for deformation before installation; 3. Tighten bolts evenly.

10

Gasket

107.15.110.04

Asbestos-free rubber (NBR + aramid fiber)

1. Chemical corrosion from drilling fluid; 2. High-pressure extrusion; 3. Damage during installation.

1. Avoid contact with corrosive fluids; 2. Handle gently to prevent tearing; 3. Replace after each disassembly.

1

Stud

107.15.110.07

Alloy steel (8.8 grade, surface zinc-plated)

1. Thread wear from frequent disassembly; 2. Fatigue fracture from cyclic vibration; 3. Corrosion from humid environment.

1. Torque to 60-65N·m during installation; 2. Apply anti-rust lubricant to threads; 3. Replace if thread damage occurs.

2

Stud

107.15.110.06

Alloy steel (8.8 grade, surface zinc-plated)

1. Over-tightening causing thread deformation; 2. Corrosion from drilling fluid leakage; 3. Fatigue from long-term pressure.

1. Use torque wrench for installation; 2. Inspect threads for corrosion monthly; 3. Replace after one fatigue cycle.

3

Stud

107.04.110.10

Alloy steel (8.8 grade, surface zinc-plated)

1. Wear from nut rotation; 2. Corrosion from hydraulic oil; 3. Shear stress from part misalignment.

1. Ensure part alignment before tightening; 2. Clean threads before assembly; 3. Check for shear cracks regularly.

4

Stud

107.15.110.28

Alloy steel (8.8 grade, surface zinc-plated)

1. Vibration-induced loosening; 2. Thread corrosion; 3. Fatigue fracture from high load.

1. Use lock washers; 2. Retighten every 100 working hours; 3. Replace if fatigue signs appear.

5

Bolt

GB5782-86 (M20x75)

Carbon steel (8.8 grade, surface zinc-plated)

1. Thread wear; 2. Fatigue from cyclic load; 3. Corrosion from on-site environment.

1. Torque to 55-60N·m; 2. Apply thread lock adhesive; 3. Inspect for rust monthly.

6

Bolt

107.04.110.50

Alloy steel (8.8 grade, surface zinc-plated)

1. Over-tightening causing shank deformation; 2. Wear from washer friction; 3. Corrosion from drilling fluid.

1. Follow torque specifications; 2. Use compatible washers; 3. Clean after exposure to drilling fluid.

7

Bolt

GB5782-86 (M20x55)

Carbon steel (8.8 grade, surface zinc-plated)

1. Vibration-induced loosening; 2. Thread corrosion; 3. Fatigue fracture from repeated load.

1. Use lock nuts; 2. Check tightness weekly; 3. Replace if thread damage is found.

8

Nut

C3-9-92 (M24*2)

Carbon steel (8.8 grade, surface zinc-plated)

1. Thread wear from stud rotation; 2. Corrosion; 3. Deformation from over-tightening.

1. Do not over-tighten; 2. Clean threads before use; 3. Replace if thread stripping occurs.

9

Nut

C3-9-92 (M36*3)

Carbon steel (8.8 grade, surface zinc-plated)

1. High-load thread wear; 2. Corrosion from harsh environment; 3. Loosening from vibration.

1. Use torque wrench (90-95N·m); 2. Apply anti-loosening adhesive; 3. Inspect monthly for tightness.

10

Nut

C3-9-92 (M30x2)

Carbon steel (8.8 grade, surface zinc-plated)

1. Thread wear; 2. Corrosion; 3. Deformation from uneven load.

1. Ensure uniform load distribution; 2. Clean threads regularly; 3. Replace if deformed.

11

Nut

GB6170-86 (M20)

Carbon steel (8.8 grade, surface zinc-plated)

1. Thread wear from bolt rotation; 2. Corrosion; 3. Loosening from vibration.

1. Pair with lock washers; 2. Retighten weekly; 3. Replace if thread damage occurs.

12

Nut

107.04.140.02

Carbon steel (8.8 grade, surface zinc-plated)

1. Wear from valve body movement; 2. Corrosion from drilling fluid; 3. Loosening from pump vibration.

1. Tighten after valve maintenance; 2. Clean after exposure to drilling fluid; 3. Inspect for wear monthly.

13

Nut

G3-9-92 (M30x2)

Carbon steel (8.8 grade, surface zinc-plated)

1. Thread wear; 2. Corrosion; 3. Deformation from over-tightening.

1. Follow torque specifications; 2. Apply anti-rust coating; 3. Replace if thread stripping is found.

14

Lock nut

107.04.120.00 (M39x3)

Alloy steel (8.8 grade, surface zinc-plated)

1. Thread wear from liner end cover rotation; 2. Loosening from vibration; 3. Corrosion.

1. Torque to 100-105N·m; 2. Use anti-loosening adhesive; 3. Check tightness after 50 working hours.

15

Washer

GB93-87 (20)

Carbon steel (spring steel, surface zinc-plated)

1. Elastic fatigue; 2. Corrosion; 3. Deformation from over-tightening.

1. Do not reuse deformed washers; 2. Replace with bolts; 3. Ensure compatibility with bolt size.

16

Washer

GB93-87 (24)

Carbon steel (spring steel, surface zinc-plated)

1. Elastic fatigue losing locking function; 2. Corrosion; 3. Wear from nut friction.

1. Inspect elasticity before use; 2. Replace after 3 disassembly cycles; 3. Clean surface before installation.

17

Washer

GB93-87 (20)

Carbon steel (spring steel, surface zinc-plated)

1. Deformation; 2. Corrosion; 3. Fatigue from vibration.

1. Use matching bolt size; 2. Replace if deformed; 3. Apply anti-rust coating annually.

1

Bush

107.15.110.27

Copper alloy (ZCuSn10Pb1, wear-resistant)

1. Friction wear from moving parts; 2. Lack of lubrication; 3. Abrasive wear from debris.

1. Ensure continuous lubrication; 2. Clean assembly area to avoid debris; 3. Replace if wear exceeds 0.5mm.

2

Liner bushing

107.15.110.25

Alloy steel (40Cr, quenched & tempered)

1. Wear from liner movement; 2. Corrosion from drilling fluid; 3. Fatigue from cyclic load.

1. Check fit with liner regularly; 2. Clean to remove sediment; 3. Replace if wear or corrosion is severe.

3

Wear plate

107.15.110.24

High-chromium cast iron (Cr15, wear-resistant)

1. Abrasive wear from drilling mud; 2. Impact damage from debris; 3. Fatigue from vibration.

1. Inspect wear thickness weekly; 2. Remove debris from surface; 3. Replace if wear exceeds 2mm.

4

Guide ring

107.04.140.05

Copper alloy (ZCuSn6Zn6Pb3, self-lubricating)

1. Friction wear from valve movement; 2. Corrosion from drilling fluid; 3. Misalignment causing uneven wear.

1. Ensure valve alignment; 2. Use compatible lubricant; 3. Replace if guide clearance exceeds 0.1mm.

1

Valve body

107.04.140.01

Alloy steel (40Cr, corrosion-resistant)

1. High-pressure fluid scouring; 2. Corrosion from drilling mud; 3. Wear from valve seat friction.

1. Inspect valve seat for wear quarterly; 2. Clean internal passages; 3. Replace if erosion occurs.

2

Spring

107.04.110.57

Spring steel (65Mn, heat-treated)

1. Fatigue from cyclic compression; 2. Corrosion; 3. Deformation from over-compression.

1. Check spring elasticity monthly; 2. Avoid over-compression; 3. Replace if deformation or fatigue occurs.

3

Support

107.15.111.04

Carbon steel (Q235B, welded structure)

1. Load-induced fatigue; 2. Corrosion from environment; 3. Welding seam damage from vibration.

1. Inspect welding seams monthly; 2. Apply anti-rust coating annually; 3. Ensure uniform load distribution.

4

Flange

107.04.111.03-1

Alloy steel (16Mn, pressure-resistant)

1. High-pressure fluid impact; 2. Corrosion from drilling mud; 3. Bolt hole wear from fastener rotation.

1. Conduct pressure testing per GB/T 9711-2011; 2. Tighten bolts evenly; 3. Inspect bolt holes for wear.

5

Flange

107.04.110.16-1

Alloy steel (16Mn, pressure-resistant)

1. Corrosion from humid environment; 2. Wear from gasket friction; 3. Deformation from uneven pressure.

1. Clean flange surface before installing gasket; 2. Ensure uniform pressure; 3. Replace if deformed.

6

Plug

GB3289.31-82 (R2)

Carbon steel (Q235B, surface galvanized)

1. Thread wear from installation/removal; 2. Corrosion from internal fluid; 3. Loosening from vibration.

1. Apply thread sealant during installation; 2. Check tightness monthly; 3. Replace if thread damage occurs.

7

Nipple

107.15.110.22

Carbon steel (Q235B, surface galvanized)

1. Corrosion from fluid; 2. Thread wear; 3. Fatigue from vibration.

1. Use thread sealant; 2. Inspect for corrosion monthly; 3. Replace if thread stripping is found.

8

Spray hose

107.14.124.00

Rubber (NBR, oil-resistant, reinforced with steel wire)

1. Wear from external friction; 2. Aging from high temperature; 3. Damage from pressure surge.

1. Avoid contact with sharp objects; 2. Limit pressure to rated value; 3. Replace every 800 working hours.

9

Hand

107.15.110.26

Carbon steel (Q235B, surface anti-rust coating)

1. Impact damage; 2. Corrosion; 3. Fatigue from repeated operation.

1. Handle gently to avoid impact; 2. Clean and apply anti-rust paint annually; 3. Inspect for cracks before use.

1

Ring threaded

107.15.110.05

Carbon steel (Q235B, surface zinc-plated)

1. Thread wear from rotation; 2. Corrosion; 3. Deformation from over-tightening.

1. Tighten per torque standard; 2. Clean threads before use; 3. Replace if thread damage occurs.

2

Module studded

107.15.110.34

Alloy steel (8.8 grade, surface zinc-plated)

1. Thread wear; 2. Fatigue from cyclic load; 3. Corrosion from environment.

1. Inspect threads regularly; 2. Apply anti-rust lubricant; 3. Replace if fatigue signs appear.

3

Locking plate

107.15.110.29

Carbon steel (Q235B, surface galvanized)

1. Wear from nut friction; 2. Corrosion; 3. Bending damage during installation.

1. Install correctly to fit nut; 2. Inspect for bending before use; 3. Replace if damaged.

4

Cage

107.15.110.31

Carbon steel (Q235B, welded structure)

1. Impact damage from debris; 2. Corrosion; 3. Welding seam fatigue from vibration.

1. Inspect welding seams monthly; 2. Clean to remove debris; 3. Replace if deformed or cracked.

5

Locking clip

107.14.110.11

Spring steel (65Mn, heat-treated)

1. Elastic fatigue; 2. Corrosion; 3. Damage during installation.

1. Check elasticity before use; 2. Avoid over-bending during installation; 3. Replace if fatigue occurs.

1

How to choose the right lubricant for Lanzhou LS 3NB500C fasteners and bushings?

Use lithium-based extreme pressure lubricant (NLGI Grade 2) for fasteners, compliant with GB/T 7631.1-2008. For bushings, use ISO VG 68 gear oil to ensure lubrication and reduce friction, extending component service life.

2

What is the recommended replacement cycle for seals and gaskets of this pump?

Replace seals every 500-600 working hours (depending on operating environment); replace gaskets after each disassembly or every 800 working hours. Harsh, high-corrosion environments may require shorter replacement cycles.

3

How to prevent fastener loosening in Lanzhou LS 3NB500C during drilling operations?

Torque fasteners per standard specifications, use lock washers or thread lock adhesive, retighten weekly, and apply anti-rust lubricant to threads. Regularly inspect for vibration-induced loosening, especially in high-vibration areas.