Product Introduction
This series of discharge manifold replacement parts covers all core components suitable for Lanzhou LS 3NB500C, 3NB1000C, 3NB1300C, 3NB1600 mud pumps, including discharge manifold main body, manifold casing, strainer assembly, elbows, upper and lower flanges, high-strength studs, locking nuts, positioning pins, sealing rings, plugs and other matching fittings. All parts are made of high-strength alloy steel and wear-resistant polymer sealing materials, processed with high-precision CNC equipment to ensure perfect fit with original manifold interfaces, requiring no on-site modification or secondary processing. The universal design of parts across four pump models simplifies inventory management and procurement, meeting the needs of daily routine inspection, emergency high-pressure leak repair and full manifold overhaul.
Core Functional Specifications
Every component is engineered to withstand harsh high-pressure mud delivery conditions, with clear and reliable performance indicators to meet field operation requirements:
- High-Pressure Bearing Capacity: The manifold casing and flange assemblies have a rated working pressure of 0-35MPa, fully adapting to the high-pressure mud discharge demand of four models of LS mud pumps, resisting hydraulic impact and pressure fluctuation damage.
- Sealing Performance: Specialized polymer sealing rings feature excellent wear resistance and mud corrosion resistance, achieving zero leakage under long-term high-pressure mud contact, with a service life of up to 3200 operating hours.
- Fastener Stability: 12.9 grade high-strength studs (M36×3) and matched locking nuts adopt anti-loosening design, maintaining stable torque under continuous high-frequency vibration and hydraulic impact, avoiding loose or fractured faults.
- Mud Conveying & Filtration: The built-in strainer assembly effectively filters out large particle impurities in mud, preventing pipeline blockage and reducing erosion damage to downstream valves and pipelines.
Structural Design Features
These discharge manifold parts prioritize high-pressure safety, erosion resistance and easy maintenance, fully adapted to harsh drilling site high-pressure operation conditions:
- High-Strength Integrated Casing: The manifold casing adopts integrated forging and welding process, with smooth inner wall and thickened pressure-bearing design, effectively reducing mud erosion and resisting high-pressure deformation.
- Precision Flange Sealing Structure: Standardized flange interfaces with positioning pin limit design, ensuring accurate alignment during installation, improving sealing fit and preventing offset leakage.
- Detachable Strainer Design: The strainer assembly can be quickly disassembled for cleaning and replacement, without dismantling the entire manifold, simplifying daily maintenance work.
- Elbow Anti-Erosion Design: Elbow parts adopt thickened wear-resistant structure, with optimized radian to reduce mud impact wear, prolonging the service life of bent pipeline parts.
- Standardized Universal Interface: All connecting parts adopt uniform industrial standard interfaces, realizing universal matching across four mud pump models, reducing procurement and inventory costs.
Maintenance & Service Recommendations
To ensure the safe operation of the discharge manifold and avoid high-pressure leakage accidents, follow these API-standardized maintenance protocols:
- Daily Inspection: Check all flange and joint connections for mud leakage; inspect the manifold surface for cracks or deformation; monitor mud discharge pressure for abnormal fluctuations.
- Weekly Maintenance: Tighten high-strength studs and nuts to rated torque; clean the strainer assembly to remove filtered impurities and prevent blockage.
- Monthly Maintenance: Inspect sealing rings for wear, aging or damage, and replace damaged parts promptly; check positioning pins for looseness or fracture.
- Quarterly Maintenance: Overhaul the inner wall of elbows and manifold casing for erosion damage; calibrate the firmness of all fasteners; clean and maintain the entire manifold pipeline.
- Storage Requirements: Store spare parts in a dry, ventilated environment; sealing rings should be protected from direct sunlight and high temperature to prevent premature aging.
- We supply the following spare parts:
| NAME | PART NO | |||
| NAME | 3NB500C | 3NB1000C | 3NB1300C | 3NB1600 |
| Slush pump | 107.15.00 | 107.14.00 | 107.12.00 | 107.11.00 |
| Discharge mainfold | 107.164.00 | 107.164.00 | 107.164.00 | 107.164.00 |
| Ring | 107.04.110.42-1 | 107.04.110.42-1 | 107.04.110.42-1 | 107.04.110.42-1 |
| Nut | C3-9-92(M36×3) | C3-9-92(M36×3) | C3-9-92(M36×3) | C3-9-92(M36×3) |
| stud | C1-13-92(M36×3 L=120) | C1-13-92(M36×3 L=120) | C1-13-92(M36×3 L=120) | C1-13-92(M36×3 L=120) |
| Elbow | 107.164.01 | 107.164.01 | 107.164.01 | 107.164.01 |
| Case | 107.164.10.00 | 107.164.10.00 | 107.164.10.00 | 107.164.10.00 |
| Strainer | 107.164.20.00 | 107.164.20.00 | 107.164.20.00 | 107.164.20.00 |
| Stud | 107.10.110.16(M36×3 L=215) | 107.10.110.16(M36×3 L=215) | 107.10.110.16(M36×3 L=215) | 107.10.110.16(M36×3 L=215) |
| Flange | 107.164.02 | 107.164.02 | 107.164.02 | 107.164.02 |
| Pin | GB117-86(A10×40) | GB117-86(A10×40) | GB117-86(A10×40) | GB117-86(A10×40) |
| Ring | 107.04A.160.03-1 | 107.04A.160.03-1 | 107.04A.160.03-1 | 107.04A.160.03-1 |
| Flange | 107.164.03 | 107.164.03 | 107.164.03 | 107.164.03 |
| Plug | 107.164.04（2″) | 107.164.04（2″) | 107.164.04（2″) | 107.164.04（2″) |
| Elbow | 107.164.05(2″) | 107.164.05(2″) | 107.164.05(2″) | 107.164.05(2″) |
On-Site Fault Repair Case Studies
Case 1: Damaged Sealing Ring Causing High-Pressure Mud Leakage
A land deep-well drilling rig’s Lanzhou LS 3NB1000C mud pump had severe high-pressure mud leakage at the discharge manifold flange. On-site inspection found that the sealing ring (107.04.110.42-1) was severely worn by mud erosion, losing sealing performance. Maintenance personnel replaced the damaged sealing ring, re-tightened the high-strength studs to standard torque, and completely eliminated the leakage, restoring safe operation of the manifold.
Case 2: Clogged Strainer Leading to Unstable Discharge Pressure
An offshore drilling site’s LS 3NB1300C mud pump showed unstable mud discharge pressure and reduced flow. The fault was located as a strainer assembly (107.164.20.00) completely clogged by sand and rock debris, blocking mud flow. Technicians disassembled and cleaned the strainer, removed internal impurities, and reinstalled the assembly, restoring stable mud discharge pressure and flow.
Case 3: Loose Studs Causing Manifold Vibration & Leakage
A drilling team’s LS 3NB1600 mud pump discharge manifold had severe vibration and slight mud leakage. Long-term high-pressure hydraulic impact loosened the M36×3 high-strength studs, leading to poor flange fitting. Workers tightened all studs and matching nuts, replaced worn positioning pins, and eliminated vibration and leakage risks, ensuring safe high-pressure operation.
Frequently Asked Questions (FAQ)
| Question | Answer |
| Are these discharge manifold parts universal for all four Lanzhou LS 3NB series mud pumps? | Yes, all parts in this catalog are designed to fully match 3NB500C, 3NB1000C, 3NB1300C, 3NB1600 mud pump discharge manifolds (107.164.00), with uniform OEM dimensions and interfaces, no model-specific customization required. |
| What is the rated pressure resistance of these discharge manifold components? | All manifold casings, flanges and sealing parts are rated for a maximum working pressure of 35MPa, fully matching the high-pressure mud discharge requirements of the four LS 3NB series mud pump models. |
| How often should the strainer assembly be cleaned? | Under normal drilling conditions, clean the strainer assembly every 10-15 days; in sand-heavy or complex formation drilling environments, shorten the cleaning cycle to 7 days to avoid mud blockage and pressure fluctuations. |
Procurement Guidance
This Lanzhou LS 3NB series mud pump discharge manifold parts list is a professional, safety-compliant reference for drilling equipment managers, maintenance teams and procurement staff, providing standardized, high-strength spare parts solutions for daily maintenance, emergency leak repair and inventory preparation. Using these OEM-standard replacement parts can quickly resolve common discharge manifold faults, eliminate high-pressure mud leakage risks, reduce pipeline erosion damage, and effectively lower long-term equipment maintenance and safety management costs.
