LANZHOU LS 3NB1300 Mud Pump Parts Catalog

1

Φ 180 mm Liner (Chrome)

107.11.110.31

Base material: High-strength alloy steel; Inner surface: Hard chrome plating (thickness ≥ 0.15mm), hardness HRC 60-65

1. Abrasive wear from solid particles in drilling mud; 2. Erosion corrosion caused by high-velocity mud flow at the port.

1. Control drilling mud solid content below 10% and ensure proper desanding treatment; 2. Inspect liner inner surface for scratches and plating peeling regularly; replace if wear depth exceeds 0.5mm.

2

Φ 170 mm Liner (Chrome)

107.11.110.30

Base material: High-strength alloy steel; Inner surface: Hard chrome plating (thickness ≥ 0.15mm), hardness HRC 60-65

1. Abrasive wear from solid particles in drilling mud; 2. Uneven pressure distribution leads to local stress concentration and deformation.

1. Ensure uniform tightening of cylinder head bolts to avoid uneven liner stress; 2. Use mud with qualified viscosity to reduce particle sedimentation and wear.

3

Φ 160 mm Liner (Chrome)

107.11.110.29

Base material: High-strength alloy steel; Inner surface: Hard chrome plating (thickness ≥ 0.15mm), hardness HRC 60-65

1. Abrasive wear from solid particles in drilling mud; 2. Thermal fatigue caused by frequent temperature changes of circulating mud.

1. Avoid sudden temperature changes of incoming mud; preheat or cool mud appropriately in extreme environments; 2. Regularly measure liner inner diameter tolerance; replace if it exceeds the nominal size by 0.3mm.

4

Φ 180 mm Piston Complete

107.11.130.00

Piston core: Alloy steel (42CrMo); Sealing rubber: High-abrasion nitrile rubber (NBR) with fiber reinforcement

1. Abrasive wear of rubber sealing surface by mud particles; 2. Excessive piston stroke leads to rubber extrusion and deformation.

1. Check piston stroke regularly to ensure it is within the specified range; 2. Replace piston assembly if rubber shows cracks, bulges, or wear exceeding 30% of original thickness.

5

Φ 180 mm Piston Rubber

107.11.130.00

High-abrasion nitrile rubber (NBR) with fiber reinforcement, oil-resistant and acid-resistant

1. Abrasive wear from mud particles; 2. Aging and hardening caused by long-term contact with high-temperature mud and chemical additives.

1. Store piston rubber in a cool, dry environment away from direct sunlight and chemicals; 2. Replace rubber every 500 working hours or when oil leakage is detected.

6

Φ 170 mm Piston Complete

107.06.70.00

Piston core: Alloy steel (42CrMo); Sealing rubber: High-abrasion nitrile rubber (NBR) with fiber reinforcement

1. Abrasive wear of rubber sealing surface by mud particles; 2. Misalignment between piston and liner leads to uneven wear.

1. Check the coaxiality of piston and liner regularly; adjust if deviation exceeds 0.2mm; 2. Clean the piston surface before installation to remove mud and debris.

7

Φ 170 mm Piston Rubber

107.06.70.00

High-abrasion nitrile rubber (NBR) with fiber reinforcement, oil-resistant and acid-resistant

1. Abrasive wear from mud particles; 2. Chemical corrosion from mud additives (such as flocculants and corrosion inhibitors).

1. Select piston rubber compatible with mud chemical composition; 2. Inspect rubber surface for blistering and peeling regularly; replace immediately if found.

8

Φ 160 mm Piston Complete

107.06.68.00

Piston core: Alloy steel (42CrMo); Sealing rubber: High-abrasion nitrile rubber (NBR) with fiber reinforcement

1. Abrasive wear of rubber sealing surface by mud particles; 2. Fatigue damage caused by cyclic reciprocating motion.

1. Ensure the pump operates at a stable speed to reduce cyclic fatigue; 2. Replace piston assembly if the rubber sealing edge is worn or the piston core is deformed.

9

Φ 160 mm Piston Rubber

107.06.68.00

High-abrasion nitrile rubber (NBR) with fiber reinforcement, oil-resistant and acid-resistant

1. Abrasive wear from mud particles; 2. Compression set caused by long-term continuous operation under high pressure.

1. Arrange regular shutdown intervals to relieve rubber compression stress; 2. Avoid over-tightening the piston rod clamp to prevent rubber damage.

1

Valve Seat

107.11.140.04

Alloy steel (40CrNiMoA), heat-treated, surface hardening (HRC 58-62), precision grinding

1. Impact wear from high-frequency valve opening and closing; 2. Abrasive wear and corrosion from mud particles and chemical additives.

1. Check valve seat sealing surface for pits and wear regularly; regrind or replace if necessary; 2. Maintain mud cleanliness to reduce particle abrasion.

2

Valve Complete

107.11.140.01

Valve body: Alloy steel (42CrMo); Sealing insert: Wear-resistant rubber; Guide rod: Stainless steel (304)

1. Wear of sealing insert caused by mud particle abrasion; 2. Bending deformation of guide rod due to uneven stress.

1. Inspect valve guide clearance regularly; replace valve if clearance exceeds 0.15mm; 2. Avoid rapid pressure changes during pump startup and shutdown to reduce impact on valves.

3

Valve Spring

-

50CrVA spring steel, heat-treated, surface shot peening, high fatigue strength

1. Fatigue failure caused by high-frequency cyclic compression; 2. Corrosion from moisture and mud penetration.

1. Check spring free length and elastic force regularly; replace if free length changes by more than 5%; 2. Clean and apply anti-corrosion grease to springs during maintenance.

4

Valve Guide Bushing

-

Copper alloy (ZCuSn10Pb1), wear-resistant, self-lubricating

1. Abrasive wear from the sliding of the valve guide rod; 2. Scuffing caused by insufficient lubrication and mud contamination.

1. Ensure proper lubrication between guide bushing and guide rod; 2. Replace guide bushing if inner diameter wear exceeds 0.2mm or if scratches are found.

5

Valve Clip (Locking Clip)

107.11.110.52-1

65Mn spring steel, heat-treated, surface phosphating, high elasticity

1. Elastic fatigue caused by repeated assembly and disassembly; 2. Wear from contact with valve components during operation.

1. Use special tools for assembly and disassembly to avoid damaging the clip; 2. Inspect the clip for deformation and elasticity regularly; replace if necessary.

6

Valve Rubber (Insert)

107.11.140.03

High-hardness, wear-resistant rubber (HNBR), acid-resistant, alkali-resistant, and oil-resistant

1. Abrasive wear from mud particles; 2. Aging and cracking caused by high temperature and chemical corrosion.

1. Replace valve rubber inserts every 300-500 working hours or when sealing failure occurs; 2. Store rubber inserts in a sealed, cool environment to prevent aging.

1

Liner Seal (210 x 198 x 8.6) mm

-

Nitrile rubber (NBR) with steel skeleton, oil-resistant, high-pressure resistant

1. Extrusion deformation caused by high pump pressure; 2. Abrasive wear from mud particles entering the sealing surface.

1. Ensure the sealing groove is clean and free of burrs before installation; 2. Tighten the cylinder head evenly to avoid uneven pressure on the seal.

2

Cylinder Head Seal (270 x 189 x 9) mm

-

Fluororubber (FKM/Viton), high-temperature resistant (up to 200°C), corrosion-resistant

1. High-temperature aging caused by long-term contact with high-temperature mud; 2. Chemical corrosion from mud additives.

1. Avoid using the pump in environments exceeding the seal's temperature rating; 2. Replace the seal every time the cylinder head is disassembled.

3

Valve Cover Seal (190 x 172 x 9) mm

-

EPDM rubber, weather-resistant, acid-resistant, and alkali-resistant

1. Compression set caused by long-term continuous pressure; 2. Wear from repeated opening and closing of the valve cover.

1. Control the compression amount within 20-30% of the seal's original thickness; 2. Inspect the seal for cracks and hardening regularly; replace if necessary.

4

Intermediate Rod Seal (140 x 109 x 14) mm

107.11.97.00

Polyurethane (PU), high wear resistance, high elasticity, oil-resistant

1. Abrasive wear from the reciprocating motion of the intermediate rod; 2. Damage caused by foreign particles adhering to the rod surface.

1. Keep the intermediate rod surface clean and smooth; remove rust and debris before installation; 2. Replace the seal if oil leakage occurs or if the seal lip is worn.

1

Locking Plate

107.11.110.65-1

Carbon steel (Q235) with galvanizing, precision stamping

1. Wear from contact with rotating or moving components; 2. Corrosion from moisture and mud contamination.

1. Check the locking plate for deformation and wear regularly; replace if it cannot effectively lock components; 2. Clean the plate and its mating surface during maintenance.

2

Locking Clip

107.11.110.52

65Mn spring steel, heat-treated, surface phosphating, high elasticity

1. Elastic fatigue caused by repeated compression and release; 2. Wear from friction with locked components.

1. Avoid over-stretching the locking clip during installation; 2. Inspect the clip for cracks and loss of elasticity regularly; replace if necessary.

3

Piston Rod Clamp

107.11.114.00

Alloy steel (40Cr), quenched and tempered, precision machining

1. Thread wear caused by repeated tightening and loosening; 2. Deformation caused by uneven clamping force.

1. Tighten the clamp bolts evenly according to the specified torque; 2. Check the clamp for deformation and thread damage regularly; replace if necessary.

1

Cage

107.11.330.00

Alloy steel (Q355B), welded, surface sandblasting and painting

1. Wear and deformation caused by collision with other components during transportation and operation; 2. Corrosion from environmental moisture and mud splashing.

1. Avoid collision during transportation and installation; 2. Inspect the cage for cracks and deformation regularly; repair or replace if necessary.

2

Piston Rod

107.11.110.39

Alloy steel (42CrMo), quenched and tempered, surface hard chrome plating

1. Abrasive wear from mud and sealing components; 2. Bending deformation caused by uneven load and vibration.

1. Check the piston rod for straightness regularly; correct or replace if bending exceeds 0.2mm/m; 2. Inspect the chrome plating surface for peeling and scratches; re-plate if necessary.

3

Diaphragm

107.130.01.00-1

Reinforced rubber (NBR + fabric), high elasticity, oil-resistant, pressure-resistant

1. Fatigue damage caused by cyclic pressure changes; 2. Chemical corrosion from mud additives and aging.

1. Avoid rapid pressure fluctuations in the pump; 2. Replace the diaphragm every 800-1000 working hours or when cracks and leaks are found.

4

Stabilizer

107.130.02

Alloy steel (40Cr), heat-treated, surface nitriding, wear-resistant

1. Abrasive wear from contact with moving components and mud particles; 2. Fatigue cracking caused by cyclic vibration.

1. Check the stabilizer for wear and cracks regularly; replace if wear depth exceeds 2mm; 2. Ensure the stabilizer is properly installed to avoid uneven stress.