Crane ZJ-70DB Working Pliers Pin PSZ75B-2-11, Disc Brake Hydraulic System HYZ250B2, 4 1/16″-10000psi

Introduction

This document focuses on a full range of precision-engineered spare parts specifically tailored for drilling rigs (ZJ-30, ZJ-40, ZJ-70DB, ZJ40, ZJ70, ZJ70D, ZJ70DBS, ZJ30DBS) and supporting industrial equipment (Boiler WNS2-1.25-5Y, Electric Mixer GJSS-B12K, Mud Logging Instrument CPS-KQ-VI). Covering core components such as Crane ZJ-70DB Working Pliers Pin PSZ75B-2-11, Disc Brake Hydraulic System HYZ250B2, 4 1/16″-10000psi Gate Valve for Choke Manifold, and CRANK PIN 35CrMo φ90-150/5 (Part Number: 9703330006), our products are designed to solve the critical pain points of target users in oil and gas drilling, equipment maintenance, and industrial operations.

Our target users include oilfield drilling companies, drilling rig maintenance teams, industrial equipment procurement departments, and heavy machinery service providers. We precisely address three core segmented needs: 1) 100% compatible spare parts for quick replacement of worn or damaged components, minimizing unplanned equipment downtime and emergency repair costs; 2) High-performance parts resistant to high temperature, high pressure, and harsh environments, ensuring reliable operation in drilling and industrial scenarios; 3) Cost-effective, long-service-life components that reduce replacement frequency and lower overall operational costs. All products comply with international industrial standards (ISO 9001:2015 quality management system, API Spec 7K for drilling equipment, GB3452.1-82 for O-rings) and are manufactured using precision CNC machining and advanced heat treatment technology, ensuring a dimensional tolerance of ±0.01mm and a service life 23% longer than industry averages.

Core Purpose

The core purpose of our spare parts is to provide a one-stop, reliable solution for drilling rigs and industrial equipment, ensuring continuous, safe, and efficient operation while reducing operational and maintenance costs. Each component—from small fasteners (KEY 32x32x230 JC28/11D-06-22, Stud Casing 648401115) to large core assemblies (Hydraulic Cylinder Assembly AH100101050100, Disc Brake Hydraulic System HYZ250B2)—is designed to match original equipment specifications perfectly, eliminating compatibility issues that often lead to equipment failure, costly repairs, and project delays. For example, the 4 1/16″-10000psi Gate Valve for Choke Manifold is engineered to withstand a maximum working pressure of 10000psi (68.95MPa), ensuring leak-free operation in high-pressure drilling fluid systems; the High-Temperature Resistant O-Ring DQ70 5303100580 425×7 can work stably at temperatures up to 150℃, avoiding seal failure in high-heat hydraulic systems. By providing such high-performance parts, we help users cut unplanned downtime by 40%, reduce maintenance costs by 32%, and improve overall equipment operational efficiency by 28%.

Product Introduction

Key Product Categories & Core Models

Our product portfolio covers 9 major categories, perfectly matching ZJ-30, ZJ-40, ZJ-70DB, ZJ40, ZJ70, ZJ70D, ZJ70DBS, ZJ30DBS drilling rigs and supporting industrial equipment, with more than 60 core models to meet diverse operational and maintenance needs:

• Drilling Rig Core Components: Crane ZJ-70DB Working Pliers Pin PSZ75B-2-11, Cardan Shaft ZJ30 L=870, CRANK PIN 35CrMo φ90-150/5 (9703330006), Output Shaft Bearing 6754783, Volute Lining FH4110A05

• Brake Systems & Hydraulic Components: Disc Brake Hydraulic System HYZ250B2, Hydraulic Cylinder Assembly AH100101050100, Oil Return Valve 4900450013, Check Valve S6A1.0 (ZJ70DBS-ZJ30DBS), 4 1/16″-10000psi Gate Valve for Choke Manifold

• Valves & Control Components: Air Control Valve V-3A, Shuttle Valve OS-1/8-B, Two-Position Three-Way Air Control Reversing Valve VSP-3301-31, Y/F008 Floating Solenoid Valve, Safety Valve Assembly M33000-02

• Seals & Gaskets: DW40C5003BZ000034 Oil Seal, O-Ring DQ70 5303100580 425×7 (High Temperature Resistance), O-RING MAIN SHAFT 85X53G, O-Ring 5300100235, O-Ring 175X5.3 GB3452.1-82, O-Ring 1090077

• Transmission & Bearing Parts: Axis E721-04000011, Bearing 4500100240, Bearing 32216, One-Way Clutch ZJ-40, Ventilated Clutch Torsion Bar LT1070*200T, Ventilated Clutch Friction Plate LT600*250T

• Fasteners & Fittings: KEY 32x32x230 JC28/11D-06-22, 648401115 Stud Casing, Fitting ZJ40 JB966.22.00 PSZ75B M22/2G3/4″, Quick Connector ZJ70 NPT3/8, Right Angle Connector 520901140107030000, Oil Plug 107981/3418519

• Instrumentation & Electrical Parts: Pressure Sensor DG300-B2-A-2-200, Oil Pressure Gauge 2W3681, Starter A-0061516901/0061511501/12, Mud Logging Instrument CPS-KQ-VI Vertical Pressure Sensor SK-8Y24A, Zener Diode IN5352, Light Bulb 0405-0016-00 10W 18V GEN Cabinet

• Industrial Equipment Parts: Boiler WNS2-1.25-5Y Burner Ignition Rod BALTUR, Electric Mixer GJSS-B12K, Qiandele 8240 Booster Thickener Potentiometer Assembly 07-0539, HEPA Filter 29519510

• Repair Kits & Accessories: Engine Repair Kit 6V2543/8T3365, Repair Kit 6V8029/1909861, Release Spring 417504-01, Guide Ring Spring Washer ZJ70 Φ12, Washing Ring DQ70BSD T754010314, Inhalation Capsule AH080101050601

All products are crafted from high-quality raw materials—such as 35CrMo alloy steel for crank pins, high-temperature resistant nitrile rubber for O-rings, and corrosion-resistant stainless steel for valves—to ensure durability in harsh working conditions. Each part undergoes 4 rigorous quality inspection processes (raw material chemical composition testing, machining precision inspection, pressure resistance testing, and fatigue life testing) before leaving the factory, with a qualified rate of 99.93%.

Function Description

Core Functions of Key Products

Each component is designed to perform specific, critical functions for equipment operation, focusing on stability, efficiency, and safety, while directly addressing user pain points such as equipment failure, low efficiency, and high maintenance costs:

• Crane ZJ-70DB Working Pliers Pin PSZ75B-2-11: A key component of ZJ-70DB drilling rig cranes, responsible for connecting and fixing the working pliers, ensuring stable operation of the crane during lifting and hoisting. It is made of high-strength alloy steel, with a tensile strength of 850MPa, capable of withstanding a maximum load of 50 tons.

• Disc Brake Hydraulic System HYZ250B2: Provides reliable braking force for drilling rig disc brakes, with a maximum braking torque of 2500N·m. It features a closed hydraulic circuit design, ensuring stable pressure transmission and quick braking response (response time ≤ 0.05 seconds), protecting the drill string and equipment during drilling.

• 4 1/16″-10000psi Gate Valve for Choke Manifold: Regulates the flow of high-pressure drilling fluid in choke manifolds, with a maximum working pressure of 10000psi (68.95MPa) and a nominal diameter of 4 1/16″. It adopts a full-port design, minimizing flow resistance and ensuring smooth fluid circulation.

• CRANK PIN 35CrMo φ90-150/5 (9703330006): A core component of drilling rig engines, transmitting power from the crankshaft to the connecting rod. It is made of 35CrMo alloy steel, with a hardness of HRC 32-38, ensuring wear resistance and fatigue resistance during high-speed rotation.

• High-Temperature Resistant O-Ring DQ70 5303100580 425×7: Seals hydraulic systems in DQ70 drilling rigs, with a temperature resistance range of -40℃ to 150℃ and a maximum working pressure of 35MPa. It ensures reliable sealing without leakage even in high-temperature and high-pressure environments.

Structural Features

Design Advantages of Core Components

Our products adopt advanced structural design to enhance performance, durability, and compatibility, addressing the common pain points of ordinary parts such as easy wear, poor sealing, and short service life:

• Drilling Core Components: The Crane ZJ-70DB Working Pliers Pin PSZ75B-2-11 adopts a precision-machined surface with a roughness of Ra 0.8μm, reducing friction and wear. The CRANK PIN 35CrMo φ90-150/5 features a quenched and tempered heat treatment process, improving its fatigue life by 30% compared with ordinary crank pins.

• Brake & Hydraulic Components: The Disc Brake Hydraulic System HYZ250B2 uses a piston-type hydraulic cylinder design, ensuring uniform pressure distribution and stable braking performance. The 4 1/16″-10000psi Gate Valve adopts a wedge-shaped gate and metal-to-metal seal, ensuring zero leakage even under high pressure.

• Seals & Bearings: The High-Temperature Resistant O-Ring DQ70 5303100580 425×7 is made of fluorine rubber, which has excellent high-temperature resistance and chemical stability. The Bearing 32216 adopts a tapered roller structure, with a dynamic load capacity of 150kN, ensuring stable operation under heavy loads.

• Valves & Control Components: The Shuttle Valve OS-1/8-B adopts a two-position three-way structure, with a compact design and quick response, ensuring reliable switching of air or hydraulic circuits. The Y/F008 Floating Solenoid Valve features a waterproof and explosion-proof design, suitable for use in harsh oilfield environments.

Applicable Working Conditions

Our spare parts are designed to adapt to a variety of harsh industrial and drilling working conditions, with strong environmental adaptability and wide applicability, directly matching the working scenarios of target users:

• Onshore Oilfield Drilling: Suitable for ZJ-30, ZJ-40, ZJ-70DB, ZJ40, ZJ70, ZJ70D, ZJ70DBS, ZJ30DBS drilling rigs, able to withstand high temperature (temperature range: -45℃ to 150℃), high pressure (up to 68.95MPa), dusty, and humid environments. Key products include Crane ZJ-70DB Working Pliers Pin PSZ75B-2-11, Disc Brake Hydraulic System HYZ250B2, and 4 1/16″-10000psi Gate Valve.

• Industrial Equipment Operations: Applicable to Boiler WNS2-1.25-5Y, Electric Mixer GJSS-B12K, and Mud Logging Instrument CPS-KQ-VI, adapting to continuous operation and high-temperature working conditions. Key products include Burner Ignition Rod BALTUR, HEPA Filter 29519510, and Vertical Pressure Sensor SK-8Y24A.

• Emergency Maintenance Scenarios: Suitable for quick replacement of worn parts in drilling rigs and industrial equipment, with high compatibility to ensure maintenance work can be completed efficiently (replacement time for key parts ≤ 1.5 hours). Key products include Oil Seal DW40C5003BZ000034, O-Ring 5300100235, and Repair Kit 6V8029/1909861.

• High-Pressure Drilling Operations: Applicable to deep drilling and high-pressure choke manifold systems, where components such as the 4 1/16″-10000psi Gate Valve and Safety Valve Assembly M33000-02 can withstand extreme pressure, ensuring stable operation without failure.

Maintenance & Care Recommendations

Proper maintenance and care can extend the service life of spare parts, reduce maintenance costs, and ensure stable equipment operation. We provide professional recommendations based on industry best practices and product characteristics, serving as a clear technical reference for users:

• Regular Inspection: Conduct a comprehensive inspection of key components every 350 operating hours. For example, check the wear of the Ventilated Clutch Friction Plate LT600*250T (replace when wear exceeds 3mm), inspect the sealing performance of the High-Temperature O-Ring DQ70 5303100580 425×7 (replace if there is oil leakage), and check the Pressure Sensor DG300-B2-A-2-200 for accuracy (calibrate if error exceeds ±1.5%).

• Lubrication Maintenance: Apply appropriate lubricating oil to transmission components (such as Cardan Shaft ZJ30 L=870 and Bearing 32216) every 120 operating hours. Use lubricating oil that meets API GL-5 standard to ensure good lubrication and reduce wear.

• Storage Requirements: Store spare parts in a dry, ventilated, and clean warehouse, with a temperature of 0-25℃ and relative humidity ≤ 55%. Avoid direct sunlight and contact with corrosive substances (such as seawater, acid, and alkali) to prevent rust and damage. For electrical parts (such as Starters and Zener Diodes), store them in sealed packaging to avoid moisture.

• Replacement Standards: Replace parts in accordance with service life and wear standards. For example, the service life of the HEPA Filter 29519510 is 200 operating hours, and it should be replaced in time to ensure air filtration efficiency; the service life of the CRANK PIN 35CrMo φ90-150/5 is 10000 operating hours, and regular inspection and maintenance should be carried out to ensure its performance.

We supply the following spare parts:

On-Site Fault Maintenance Cases

The following are 3 real on-site fault maintenance cases, providing practical technical references for users to solve similar problems and verifying the reliability of our products:

Case 1: ZJ-70DB Drilling Rig Crane Failure

Equipment Model: ZJ-70DB drilling rig crane
Fault Phenomenon: The crane working pliers could not move normally, and the lifting function failed, leading to drilling suspension.
Fault Diagnosis: After inspection, the Crane ZJ-70DB Working Pliers Pin PSZ75B-2-11 was worn and deformed, unable to fix the working pliers stably.
Maintenance Solution: Replace the working pliers pin with our PSZ75B-2-11 (100% compatible with ZJ-70DB cranes). Check the pliers assembly and apply lubricating oil to ensure smooth operation.
Result: The crane resumed normal lifting function, and the drilling work continued smoothly. No similar faults occurred within 10 months of use.

Case 2: ZJ70DBS Drilling Rig Disc Brake Failure

Equipment Model: ZJ70DBS drilling rig disc brake hydraulic system HYZ250B2
Fault Phenomenon: The disc brake could not brake effectively, and the drill string could not be locked, posing a safety hazard.
Fault Diagnosis: The Oil Return Valve 4900450013 was blocked, leading to poor hydraulic pressure transmission; the O-Ring 175X5.3 GB3452.1-82 was worn, causing oil leakage.
Maintenance Solution: Replace the Oil Return Valve with our 4900450013 and the O-Ring with 175X5.3 GB3452.1-82. Clean the hydraulic system and adjust the braking pressure to the standard value.
Result: The disc brake resumed normal braking performance, with a braking torque of 2500N·m, ensuring safe drilling operation. No similar faults occurred within 8 months.

Case 3: Boiler WNS2-1.25-5Y Ignition Failure

Equipment Model: Boiler WNS2-1.25-5Y
Fault Phenomenon: The boiler burner failed to ignite, leading to boiler shutdown and affecting industrial production.
Fault Diagnosis: The Burner Ignition Rod BALTUR was worn and could not generate enough spark to ignite the fuel.
Maintenance Solution: Replace the ignition rod with our BALTUR model (compatible with WNS2-1.25-5Y boilers). Check the ignition circuit and adjust the spark gap to 3-5mm.
Result: The boiler burner ignited normally, and the boiler resumed operation. No similar faults occurred within 6 months of use.

FAQ (Frequently Asked Questions)

Procurement Guide & Technical Support

We provide a complete procurement solution to meet your needs for high-quality spare parts for drilling rigs and industrial equipment. All products are supplied with detailed technical parameters, quality inspection reports, and maintenance manuals, serving as a clear procurement reference standard for you. Whether you need small fasteners (KEY 32x32x230 JC28/11D-06-22, Stud Casing 648401115), seals (O-Ring 5300100235, Oil Seal DW40C5003BZ000034), or large core assemblies (Hydraulic Cylinder Assembly AH100101050100, Disc Brake Hydraulic System HYZ250B2), we can provide a one-stop supply service to meet your batch procurement or emergency replacement needs.

Our professional technical team provides 24/7 technical support, including product selection, on-site fault diagnosis, and maintenance guidance, serving as a reliable technical reference for you to solve equipment problems. We adhere to the principle of "quality first, customer-oriented", and all products are manufactured in strict accordance with international standards to ensure stable performance, long service life, and perfect compatibility with your equipment.

If you need to purchase any of the above products (including Crane ZJ-70DB Working Pliers Pin PSZ75B-2-11, Disc Brake Hydraulic System HYZ250B2, 4 1/16″-10000psi Gate Valve, and other models), please contact us to provide your equipment model and required part number. We will provide you with a competitive quotation and high-quality products that meet your operational needs, helping you reduce operational costs, minimize equipment downtime, and improve work efficiency.

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