ZJ30C, ZJ40, ZJ45, ZJ50LDB, ZJ70D, KDB-250FA Supply

Introduction

We focus on the production and supply of high-precision, durable spare parts for oil drilling rigs, industrial boilers, top drives, inclinometers, winches, and supporting hydraulic, pneumatic, electrical, and transmission equipment. Our product range fully covers core equipment models including ZJ30C, ZJ40, ZJ45, ZJ50LDB, ZJ50DB, ZJ70, ZJ70D, DQ70BSD Top Drive, Boiler KDB-250FA, Boiler WNS2-1.25-5Y, MWD Inclinometer YST-48R, and Winch ZJ-30C. Key components we supply include ZJ70D NPT1/4 quick connector, 23ZS-21.25D two-position three-way reversing valve, 2159mm STS915K diamond drill bit, KDB-250FA boiler nozzle (0.85G 60H), and ZJ70 high pressure hose assembly (A13II L=1350). All products are manufactured in strict compliance with API 7K, API 16A, ISO 9001, and GB/T 30582 standards, with a factory inspection pass rate of 99.9%, material qualification rate of 100%, and dimensional accuracy error ≤±0.01mm. This ensures perfect compatibility with original equipment and effectively solves the pain points of unstable operation, short service life, poor replacement adaptability, and high maintenance costs that users often face when using inferior spare parts in harsh oilfield and industrial environments.

Targeted at oil drilling companies, oilfield exploration and maintenance teams, boiler operation enterprises, top drive operators, inclinometer users, and industrial equipment repair service providers, we accurately match the segmented needs of different users: For drilling rig operation teams, we provide high-load, wear-resistant core components (such as ZJ30C winch oil pump drive shafts, ZJ45 faucet flushing parts, ZJ50LDB check valves, and 2159mm STS915K diamond drill bits) to ensure safe, efficient drilling operations and reduce non-productive downtime; for boiler operators, we supply high-safety, stable-performance accessories (KDB-250FA boiler nozzles and control box fuses, WNS2-1.25-5Y water supply pumps) to maintain stable boiler operation and meet industrial production safety standards; for top drive and inclinometer users, we offer precision parts (DQ70BSD top drive special bearings, YST-48R MWD inclinometer valve cylinders) to ensure accurate equipment operation and downhole measurement; for maintenance teams, we provide modular repair kits (8C3465, 23012606) and easy-to-install sealing parts (3J1907 seals, 5300200066 oil seals) to simplify maintenance processes and reduce labor costs. The core purpose of our products is to provide cost-effective, reliable spare parts solutions, helping users reduce operational risks, improve equipment utilization, and lower overall operational costs.

Product Overview

Core Product Categories & Key Models

Our product portfolio covers 19 major categories and more than 115 core models, fully meeting the maintenance, replacement, and upgrade needs of oil drilling rigs, boilers, top drives, inclinometers, winches, and supporting equipment. Each part is strictly matched to the corresponding equipment model to ensure seamless replacement, stable performance, and direct compatibility with original systems:

• Quick Connectors & Valves: ZJ70D NPT1/4 quick connector, 23ZS-21.25D two-position three-way reversing valve, ZJ50LDB check valve (S15A12B), check valve (521704100000064000), high pressure control valve speed regulating valve (PB-10 JYK-70DKB)

• Drill Bits & Drilling Parts: 2159mm STS915K diamond drill bit

• Boiler Parts: Boiler KDB-250FA nozzle (0.85G 60H), Boiler KDB-250FA control box fuse (250V 5A~15A), Boiler WNS2-1.25-5Y water supply pump (JGGC 2.4-152 3kW)

• Pipelines & Hoses: Y/G6I-400 pipeline, disc brake hose (ZJ50DB A13II-12000), high pressure hose (HFH2-P1-2-P-1.5), high pressure hose assembly (ZJ70 A13II L=1350), flame retardant hose assembly (140507020801004013), discharge line (AH0801010501)

• Pumps & Pump Parts: Gear oil pump device (LWBZ-200 141133), ZJ-30C winch oil pump drive shaft

• Top Drive & Clutch Parts: DQ70BSD top drive special bearing, ZJ-40 one-way clutch, ventilated clutch brake shoe assembly (LT1168*305T)

• Inclinometer & MWD Parts: Inclinometer YST-48R valve cylinder (4803146 MWD)

• Electrical & Control Parts: VFD excitation plate (0509-7901-00), video surveillance system control board (LK-001), IA150 (P-050967-00001) hand throttle, dynamo (4404304), 350219 oil pressure gauge

• Sealing & Wear Parts: 23045386 seal (3J1907), 648415156 seal shaft sleeve, O-ring (8M4433), oil seal (5300200066), crankshaft front oil seal (2W1733/1425867 Part Number:1946725), mud packing (104.05.30.08)

• Filters & Separators: Diesel fine filter element (1R0749), filter element (6I-2502), oil water separator assembly (129-0373)

• Fasteners & Structural Parts: Gasket (T508-5004), spring washer (420503011101600000), retaining ring (E4022000164/91100297AA), coupling (520901040913130000), large tie rod (P2600048AA), positioning block (P6400914AA), seat (80758-01-01), plug (DQ70 M22×1.5 2.4.33.036)

• Bearings & Assemblies: Bearing assembly (CAM005M), DQ70BSD top drive special bearing

• Repair Kits: Repair kit (8C3465), intake valve (1152367), big repair kit (23012606)

• Mechanical & Transmission Parts: Turntable drive shaft (5000700140), piston (P0700006AA), crankshaft front oil seal (1946725)

• Accessories: Y/J0017 Parker hinged joint, dipstick (6N7653), tracheal bundle (twenty three core QGL-23), faucet (ZJ45 SL225), faucet (SL-450), thermostat (4W4794), belt (9L6639), oil cooler

• Electrical Plugs: Explosion-proof plug (16A-7H 3P+ MENNEKES)

Function Description

Each product is independently designed and manufactured according to the functional requirements of the matching equipment, with clear positioning, reliable performance, and precise matching. They effectively solve the core pain points of equipment operation and ensure the stable and efficient operation of the entire equipment system:

• Drill Bits & Drilling Parts: The 2159mm STS915K diamond drill bit has a hardness of HRC 92, suitable for drilling in hard rock formations, with a drilling speed of 12-18m/h and service life of more than 600 drilling meters, ensuring efficient drilling operations.

• Boiler & Pump Parts: The KDB-250FA 0.85G 60H boiler nozzle has a flow rate of 0.85GPM, spray angle of 60°, ensuring uniform fuel atomization and stable boiler combustion; the WNS2-1.25-5Y JGGC 2.4-152 3kW water supply pump has a head of 15.2m, flow rate of 2.4m³/h, ensuring stable water supply for the boiler.

• Top Drive & Clutch Parts: The DQ70BSD 4301000510 top drive special bearing has a rated load of 500kN, service life of more than 8000 working hours, ensuring stable operation of the DQ70BSD top drive; the LT1168*305T ventilated clutch brake shoe assembly has a friction coefficient of 0.45-0.55, heat resistance up to 300℃, ensuring reliable braking of the ZJ-40 drilling rig.

• Hydraulic & Pneumatic Parts: The ZJ70D NPT1/4 quick connector has a pressure resistance of 34.5MPa, corrosion resistance, and easy connection, suitable for ZJ70D drilling rig hydraulic systems; the 23ZS-21.25D two-position three-way reversing valve has a response time of ≤0.15 seconds, ensuring precise control of hydraulic flow direction.

• Electrical & Control Parts: The VFD excitation plate 0509-7901-00 has a rated voltage of 380V, conversion efficiency of ≥98%, ensuring stable operation of the variable frequency drive system; the LK-001 video surveillance system control board supports 16-channel video input, ensuring real-time monitoring of oilfield operation sites.

• Sealing & Filter Parts: The 3J1907 seal has a pressure resistance of 25MPa, high temperature resistance up to 150℃, ensuring tight sealing of hydraulic components; the 1R0749 diesel fine filter element has a filtration precision of 2μm, filtering efficiency up to 99.9%, effectively removing impurities in diesel and protecting the engine.

Structural Features

All products adopt scientific and reasonable structural design, combining durability, ease of use, and cost-effectiveness, with outstanding structural features to adapt to harsh industrial working conditions:

1. High-Quality Material Selection: Diamond drill bits, turntable drive shafts, and top drive bearings are made of high-chromium alloy, diamond, and high-precision bearing steel; structural parts (tie rods, positioning blocks, couplings) are made of 35CrMo, 40Cr, and other high-quality alloy steels, after quenching, tempering, and other heat treatment processes, with a hardness of HRC 35-48, tensile strength ≥850MPa, and impact toughness ≥65J/cm², ensuring long-term use under high load and harsh conditions.

2. Precision Manufacturing: Adopt CNC machining, precision grinding, and diamond polishing technologies, with a machining accuracy of ±0.01mm, ensuring that the size, shape, and position tolerance of each part are completely consistent with the original equipment, enabling seamless replacement without additional modification or adjustment.

3. Sealing & Corrosion Resistance: Sealing parts (seals, oil seals, O-rings) adopt nitrile rubber (NBR), fluorine rubber (FKM), and high-temperature resistant materials, with high temperature resistance up to 200℃, oil resistance, and corrosion resistance; the surface of metal parts is treated with galvanizing, electrophoresis, or spray painting, with a corrosion resistance grade of C5-M, adapting to humid, salty, and dusty oilfield and industrial environments.

4. Easy Installation & Disassembly: The structural design is optimized according to the original equipment, and the connection method is consistent with the original parts, without the need for special tools. The installation and disassembly time can be reduced by 45%, improving maintenance efficiency.

5. Modular & Universal Design: For core components such as repair kits, filter elements, and sealing rings, a modular design is adopted, which is convenient for partial replacement and maintenance, reducing maintenance costs; some universal parts (such as spring washers, gaskets, O-rings) can be used for multiple equipment models, improving product versatility and reducing user inventory pressure.

Application Working Conditions

Our products are widely used in oil drilling, oilfield exploration and development, boiler operation, top drive operation, inclinometer downhole measurement, winch operation, and other fields, and can stably adapt to various harsh working conditions, fully meeting the actual operation needs of users and ensuring stable equipment operation:

• Oil Drilling Rigs (ZJ30C, ZJ40, ZJ45, ZJ50LDB, ZJ50DB, ZJ70, ZJ70D): Suitable for onshore and offshore drilling operations, able to withstand high temperature (-40℃ ~ 150℃), high pressure (up to 34.5MPa), strong vibration (vibration frequency 10-50Hz), and dusty, salty, and humid environments.

• Industrial Boilers (KDB-250FA, WNS2-1.25-5Y): Applicable to industrial steam production, able to adapt to high temperature (up to 1200℃ for flue gas), high humidity, long-term continuous operation, and corrosive flue gas environments, ensuring the safety and stability of boiler operation.

• Top Drives (DQ70BSD) & Winches (ZJ-30C): Suitable for oilfield top drive drilling and hoisting operations, able to adapt to high pressure (up to 31.5MPa), flammable and explosive environments, ensuring stable operation of the top drive and winch systems.

• Inclinometers (YST-48R MWD) & Electrical Systems: Inclinometer parts are suitable for downhole measurement in oil and gas wells, able to adapt to high temperature (up to 120℃) and high pressure (up to 20MPa); explosion-proof electrical parts and control boards are suitable for flammable and explosive oilfield electrical systems, ensuring stable power transmission and monitoring.

• Other Fields: Hydraulic hoses, quick connectors, and filters are suitable for various oilfield hydraulic systems; oil water separators and diesel filters are suitable for engine and pump systems, adapting to harsh outdoor and industrial working conditions.

Maintenance & Care Suggestions

To extend the service life of the products, reduce equipment failure rate, and ensure the stable operation of the entire equipment system, we provide practical, easy-to-operate maintenance and care suggestions, helping users reduce maintenance costs and improve equipment utilization:

1. Regular Inspection: For drill bits, clutch components, transmission shafts, hydraulic valves, sealing parts, and electrical modules, conduct a comprehensive inspection every 100 working hours, check for wear, cracks, deformation, and leakage, and replace them in time if any abnormality is found; for filter elements, nozzles, and lithium batteries, check for wear and damage every 200 working hours.

2. Cleaning & Replacement: Clean the surface of diesel filters (1R0749) and hydraulic filters (6I-2502) every 50 working hours, and replace the filter element every 500 working hours; clean the diamond drill bit, turntable drive shaft, and brake shoe assembly every 800 working hours to remove sediment and impurities, ensuring smooth operation.

3. Lubrication Maintenance: Apply No. 32 anti-wear hydraulic oil or special lubricating grease to transmission parts (winch oil pump drive shafts, turntable drive shafts, bearings) every 200 working hours, and apply grease to pins, connectors, and valve stems every 300 working hours to reduce friction and wear, extending the service life of the parts.

4. Storage Requirements: Unused spare parts should be stored in a dry, ventilated, and clean warehouse, avoiding direct sunlight, rain, and contact with corrosive substances; the storage temperature should be controlled between -10℃ and 40℃, and the relative humidity should not exceed 75%; for sealing parts and O-rings, store them in sealed packaging to avoid aging; for electrical parts and explosion-proof devices, keep them away from moisture and dust.

5. Installation & Fault Handling: When installing the parts, ensure that the connection is tight, and the torque meets the standard (refer to the original equipment manual); for hydraulic and pneumatic parts, check for air leakage before operation; for boiler and electrical parts, ensure correct wiring and grounding. If the parts fail during use, stop the equipment immediately, check the cause of the fault according to the maintenance manual, and do not force the equipment to operate to avoid secondary damage.

We supply the following spare parts:

On-Site Fault Maintenance Cases

We have accumulated rich on-site maintenance experience in long-term cooperation with oilfield, boiler, and industrial equipment enterprises. The following 3 real on-site fault maintenance cases provide practical reference for users to solve similar technical problems and ensure rapid equipment recovery:

Case 1: ZJ70D Drilling Rig Quick Connector Leakage

Fault Phenomenon: During the operation of the ZJ70D drilling rig, the NPT1/4 quick connector leaked hydraulic oil, resulting in reduced system pressure (from 30MPa to 22MPa) and sluggish equipment operation.

Fault Cause: The connector’s sealing ring was worn after 4000 working hours of use, and the connection was not tight due to vibration, leading to oil leakage.

Maintenance Solution: Replace the quick connector with our ZJ70D NPT1/4 spare part, check and clean the hydraulic pipeline, and tighten the connection. After replacement, there is no oil leakage, the system pressure is restored to 30MPa, and the drilling rig operates normally.

Case 2: KDB-250FA Boiler Combustion Failure

Fault Phenomenon: The KDB-250FA boiler’s 0.85G 60H nozzle was blocked, resulting in uneven fuel atomization, unstable combustion, and reduced boiler thermal efficiency (from 92% to 80%).

Fault Cause: The nozzle was blocked by fuel impurities after 3500 working hours of use, affecting fuel spray effect.

Maintenance Solution: Replace the nozzle with our KDB-250FA 0.85G 60H spare part, clean the fuel pipeline, and debug the boiler combustion system. After replacement, the fuel atomization is uniform, the boiler combustion is stable, and the thermal efficiency is restored to 92%.

Case 3: ZJ-40 Clutch Brake Failure

Fault Phenomenon: The ZJ-40 drilling rig’s LT1168*305T ventilated clutch brake shoe assembly failed, resulting in insufficient braking force, and the drill string slipped during hoisting operations, posing a safety hazard.

Fault Cause: The brake shoe was severely worn (wear thickness exceeding 5mm) after 5000 working hours of use, leading to reduced friction coefficient and braking force.

Maintenance Solution: Replace the brake shoe assembly with our LT1168*305T spare part, adjust the brake clearance, and test the braking performance. After replacement, the braking force is restored, the drill string does not slip, and the drilling rig operates safely.

FAQ (Frequently Asked Questions)

Conclusion & Procurement Guide

We are committed to providing high-quality, reliable, and cost-effective spare parts for oil drilling rigs, industrial boilers, top drives, inclinometers, winches, and supporting equipment, covering core models such as ZJ30C, ZJ40, ZJ45, ZJ50LDB, ZJ70D, KDB-250FA, and key parts such as ZJ70D NPT1/4 quick connector, 2159mm STS915K diamond drill bit, KDB-250FA boiler nozzle, and DQ70BSD top drive bearing. All products have passed strict quality inspection, with authoritative certification, stable performance, and perfect compatibility, which can effectively solve the pain points of frequent equipment failures, high maintenance costs, and poor replacement adaptability that users face.

Our products not only meet the procurement standards of users (such as material qualification, performance parameters, and compatibility), but also provide professional technical support and maintenance guidance, serving as a reliable partner for your equipment operation and maintenance. We adhere to the principle of "quality first, customer-oriented", and provide users with high-quality products and thoughtful services to help users reduce operational risks and improve economic benefits.

If you are in need of oil drilling rig spare parts, boiler accessories, top drive components, or other related products (such as ZJ30C winch oil pump drive shaft, ZJ70 high pressure hose, KDB-250FA nozzle, 8C3465 repair kit, etc.), please contact us to learn more about product details, pricing, and supply solutions. We can provide customized product supply services according to your specific equipment models and usage needs, ensuring that you can obtain the most suitable spare parts to support the stable operation of your equipment.

contact us ：

Emeil: [email protected]   whatsapp: +86 15275658619

Should you have any purchase intentions, please contact us – we will offer you our most favorable price.