DQ70BSD, ZJ-45, ZJ-70, WNS1.0-1.25-Y, 1R0749, PSZ75 Complete Supply

Introduction

We specialize in the production and supply of high-precision spare parts for oil drilling rigs, industrial boilers, and supporting equipment, covering core models such as ZJ-30C, ZJ-45, ZJ-70, DQ70BSD, DQ70BS, WNS1.0-1.25-Y, WNS2-1.25-Y, KDB-250FA, and TUFLO-1000. Our product range includes key components such as oil inlet hose assemblies (DQ70BSD 9722122112), emergency brake valves (ZJ-45 PSZ75 K23), oil filters (1R0749), boiler solenoid valves (121K6200 230V 50Hz), drum shafts, air bags (W14-20-904), high-pressure connectors, and disc brake safety gear assemblies (PSZ75). All products are manufactured in strict accordance with API 7K, ASME, and GB/T standards, with a pass rate of 99.8% in factory inspection, ensuring perfect compatibility with original equipment and solving the pain points of unstable operation, frequent failures, and poor replacement adaptability of spare parts in harsh working environments.

Targeted at oil drilling companies, oilfield maintenance teams, industrial boiler operators, and equipment repair service providers, we accurately match the细分需求 (segmented needs) of different users: for drilling rig operators, we provide wear-resistant, high-pressure-resistant and high-temperature-resistant core components to reduce downtime; for boiler operators, we supply explosion-proof, corrosion-resistant accessories to ensure safe and efficient operation; for maintenance teams, we offer easy-to-install, long-life spare parts to lower maintenance costs and improve work efficiency. Our core purpose is to provide reliable, cost-effective spare parts solutions that help users reduce operational risks and improve equipment utilization.

Product Overview

Core Product Categories & Key Models

Our product portfolio covers 6 major categories and more than 50 core models, fully meeting the maintenance and replacement needs of oil drilling rigs and industrial boilers. The key product categories and representative models are as follows:

• Drilling Rig Brake System Parts: Emergency Brake Valve (ZJ-45 PSZ75 K23), Disc Brake Safety Gear Assembly (PSZ75), Disc Brake Actuator (PSZ65D-40 SJC-00), Brake Adjustment Lever (ZJ45 106.02.50.30)

• Hydraulic & Pneumatic Parts: Oil Inlet Hose Assembly (DQ70BSD 9722122112), Air Bag (W14-20-904), Two-Position Three-Way Button Valve (23JRI-L8/4900300051), Two-Position Four-Way Pneumatic-Hydraulic Valve (512604350000040000), Shuttle Valve (OS-1/4-B)

• Filter & Sealing Parts: Oil Filter (1R0749), Oil Filter Element (1R-0756, 3825133), Oil Seal (1838444), Balance Cylinder Seal Kit (DQ70BS MB02140), Backup Pin Seal (DQ70BS B093813), CHEDEHENG SEAL (P/N 5303910370)

• Boiler Accessories: Boiler (WNS1.0-1.25-Y, WNS2-1.25-Y, KDB-250FA), Flame Retardant Rock Wool (8mm), Solenoid Valve (121K6200 230V 50Hz), Water Pump Relay (JD-100A)

• Transmission & Shaft Parts: Drum Shaft (ZJ-30C), Winch Drive Shaft (ZJ70), Cardan Shaft (CDZ150, CDZ-1986*L=1375), No.1 Transmission Shaft (ZJ45), Sliding Sleeve Set (ZJ45 106.02.52.00)

• Electrical & Control Parts: Power Supply Module (DQ70BSD 3399101180), Signal Module (IS4041-EX), Weight Table (SK-2C203F), Isolation Buffer Capsule (SK-8H03G), Audible Alarm, Remote Control Alarm Light, Explosion-Proof Electric Horn

Function Description

Each product is independently designed and manufactured according to the functional requirements of the matching equipment, with clear positioning and reliable performance, effectively solving the core pain points of equipment operation:

• Brake System Parts: Adopt high-strength alloy materials, with a braking response time of ≤0.5 seconds, load-bearing capacity up to 1200kN, and effectively prevent brake failure in high-load drilling operations, ensuring the safety of personnel and equipment.

• Hydraulic & Pneumatic Parts: The oil inlet hose assembly (DQ70BSD 9722122112) has a working pressure of 35MPa, high temperature resistance up to 120℃, and excellent corrosion resistance; the air bag (W14-20-904) has a fatigue life of more than 100,000 times, ensuring stable operation of the pneumatic system.

• Filter & Sealing Parts: The oil filter (1R0749) has a filtration precision of 10μm, which can effectively remove impurities in the hydraulic oil, extending the service life of the hydraulic system by 30%; the sealing parts adopt high-temperature and oil-resistant rubber materials, with a sealing performance of ≤0.01MPa leakage, avoiding oil leakage and air leakage.

• Boiler Accessories: The 8mm flame-retardant rock wool has a thermal conductivity of ≤0.04W/(m·K), which meets the fire protection standard of GB 8624-2012, ensuring the thermal insulation and safety of the boiler; the solenoid valve (121K6200 230V 50Hz) has a response time of ≤0.1 seconds, stable switching, and ensuring the normal water supply and combustion of the boiler.

• Transmission & Shaft Parts: The cardan shaft (CDZ150, CDZ-1986*L=1375) has a torque capacity of 2500N·m, and the concentricity error is ≤0.02mm, reducing vibration during transmission and improving the stability of the equipment; the drum shaft (ZJ-30C) is quenched and tempered, with a hardness of HRC 35-40, strong wear resistance.

• Electrical & Control Parts: The power supply module (DQ70BSD 3399101180) has a voltage stability of ±1%, ensuring stable power supply for the control system; the signal module (IS4041-EX) is explosion-proof (Ex d IIB T6 Gb), suitable for flammable and explosive oilfield environments.

Structural Features

All products adopt scientific structural design, combining durability and ease of use, and have the following outstanding features:

1. High-Strength Material Selection: Most structural parts are made of 40Cr, 20Mn2, and other high-quality alloy steels,经过 (after) quenching, tempering, and other heat treatment processes, with tensile strength ≥800MPa, ensuring long-term use under high load and harsh conditions.

2. Precision Manufacturing: Adopt CNC machining technology, with a machining accuracy of ±0.01mm, ensuring that the size of each part is consistent with the original equipment, and the replacement is seamless without additional modification.

3. Sealing & Corrosion Resistance: The sealing surface adopts precision grinding technology, and the surface roughness is Ra ≤0.8μm; the surface of metal parts is treated with galvanizing or electrophoresis, with a corrosion resistance grade of C5-M, which can adapt to humid, salty, and other harsh environments in oilfields.

4. Easy Installation & Disassembly: The structural design is optimized, and the connection method is consistent with the original parts, without the need for special tools, which can reduce the installation time by 40% and improve the maintenance efficiency.

5. Modular Design: For core components such as the brake device and hydraulic cylinder, a modular design is adopted, which is convenient for partial replacement and maintenance, reducing maintenance costs.

Application Working Conditions

Our products are widely used in oil drilling, oilfield development, industrial boiler operation, and other fields, and can stably adapt to the following harsh working conditions, meeting the actual needs of users:

• Oil Drilling Rigs (ZJ-30C, ZJ-45, ZJ-70, DQ70BSD, DQ70BS): Suitable for onshore and offshore drilling operations, able to withstand high temperature (℃ -40 ~ 120℃), high pressure (up to 35MPa), strong vibration (vibration frequency 10-50Hz), and dusty, salty environments.

• Industrial Boilers (WNS1.0-1.25-Y, WNS2-1.25-Y, KDB-250FA): Applicable to steam boilers for industrial production, able to adapt to high temperature (up to 200℃), high humidity, and long-term continuous operation conditions, ensuring the stability and safety of boiler operation.

• Other Supporting Equipment (TUFLO-1000 Air Compressor, Drilling Winch): Suitable for high-load, frequent start-stop working conditions, with strong adaptability and long service life.

Maintenance & Care Suggestions

To extend the service life of the products and ensure the stable operation of the equipment, we provide the following professional maintenance and care suggestions, which can effectively reduce the failure rate of the parts and improve the overall operation efficiency of the equipment:

1. Regular Inspection: For brake system parts, hydraulic hoses, and sealing parts, conduct a comprehensive inspection every 100 working hours, check for wear, cracks, and leakage, and replace them in time if any abnormality is found.

2. Cleaning & Lubrication: Clean the surface of the filter (1R0749, 1R-0756) every 50 working hours, replace the filter element every 500 working hours; apply lubricating oil (No. 32 anti-wear hydraulic oil) to the transmission parts (cardan shaft, drum shaft) every 200 working hours to reduce friction and wear.

3. Storage Requirements: Unused spare parts should be stored in a dry, ventilated, and clean warehouse, avoiding direct sunlight and contact with corrosive substances; the storage temperature should be controlled between -10℃ and 40℃, and the relative humidity should not exceed 75%.

4. Installation Notes: When installing the parts, ensure that the connection is tight, and the torque meets the standard (refer to the original equipment manual); for electrical parts (power supply module, signal module), pay attention to waterproof and explosion-proof, and avoid short circuit.

5. Fault Handling: 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 and industrial enterprises. The following are 3 real on-site fault maintenance cases, which can provide reference for users to solve similar technical problems:

Case 1: ZJ-45 Drilling Rig Brake Failure

Fault Phenomenon: During the drilling process of the ZJ-45 drilling rig, the brake system failed, the brake pedal was soft, and the drilling rig could not be stopped in time, which posed a safety hazard.

Fault Cause: After inspection, the emergency brake valve (PSZ75 K23) was worn, the internal seal was damaged, resulting in hydraulic oil leakage and reduced brake pressure.

Maintenance Solution: Replace the emergency brake valve with our PSZ75 K23 spare part, bleed the air in the hydraulic system, and adjust the brake clearance. After replacement, the brake response time is restored to 0.4 seconds, and the brake pressure is stable at 30MPa, which solves the fault and ensures the safe operation of the drilling rig.

Case 2: WNS2-1.25-Y Boiler Solenoid Valve Malfunction

Fault Phenomenon: The WNS2-1.25-Y industrial boiler could not supply water normally, the combustion system was interrupted, and the boiler could not operate continuously.

Fault Cause: The solenoid valve (121K6200 230V 50Hz) was老化 (aged), the internal coil was burned out, and the valve core could not be opened and closed normally.

Maintenance Solution: Replace the solenoid valve with our 121K6200 230V 50Hz spare part, check the circuit connection, and test the valve switching performance. After replacement, the boiler water supply is normal, the solenoid valve response is sensitive, and the boiler can operate continuously for 24 hours.

Case 3: DQ70BSD Drilling Rig Oil Leakage

Fault Phenomenon: The DQ70BSD drilling rig had serious oil leakage at the oil inlet, resulting in insufficient hydraulic oil pressure and unstable operation of the hydraulic system.

Fault Cause: The oil inlet hose assembly (9722122112) was aged and cracked, and the connection part was loose, resulting in oil leakage.

Maintenance Solution: Replace the oil inlet hose assembly with our DQ70BSD 9722122112 spare part, tighten the connection bolt (179860) according to the standard torque, and check the overall hydraulic system. After replacement, there is no oil leakage, and the hydraulic system pressure is stable at 28MPa, which restores the normal operation of the drilling rig.

FAQ (Frequently Asked Questions)

Conclusion & Procurement Guide

We are committed to providing high-quality, reliable spare parts for oil drilling and industrial boiler equipment, covering core models such as ZJ-30C, ZJ-45, ZJ-70, DQ70BSD, WNS1.0-1.25-Y, and WNS2-1.25-Y. All products have passed strict factory inspection, with authoritative certification and stable performance, which can effectively solve the pain points of frequent equipment failures, high maintenance costs, and poor replacement adaptability. Our products not only meet the procurement standards of users, but also provide professional technical support and maintenance guidance, serving as a reliable partner for your equipment operation and maintenance.

If you are in need of oil drilling rig spare parts, boiler accessories, or other related products (such as oil inlet hose assembly DQ70BSD 9722122112, emergency brake valve ZJ-45 PSZ75 K23, oil filter 1R0749, 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.