Parts Supply: ZJ70D D4-4-66, 1R0749, BQC-32 & 80TJQ25-30-7.5

Introduction

We specialize in manufacturing and supplying high-quality industrial components engineered to meet the stringent demands of drilling rigs, construction machinery, hydraulic systems, and fluid handling equipment. Our product portfolio includes critical parts such as the o-type sealing ring ZJ70D D4-4-66 Φ310×5.7, diesel filter 1R0749, flameproof magnetic starter BQC-32 32A 380V, main bearing 151-2939, and submersible slurry pump 80TJQ25-30-7.5. All products comply with international standards including GB 3452.1-82 for o-rings, ISO 9001:2015, API 610 for pumps, and IEC 60079 for explosion-proof equipment. We guarantee 100% compatibility with popular equipment models like ZJ70, ZJ50, DQ70BSD, and robust long-term performance. This comprehensive guide serves as a reliable reference for procurement, maintenance, and technical troubleshooting, designed to minimize unplanned downtime, reduce maintenance costs, and ensure safe, efficient operation of your industrial assets.

Core Purpose & Target User Needs

Our components are precision-matched to key equipment platforms:

• Drilling Rigs (ZJ70/ZJ50/DQ70BSD): Sealing rings (ZJ70D D4-4-66), regulators (RA101K30), and high-strength bolts (DQ70BSD 4201120322)

• Slurry & Mud Systems: Mud pump linings (G8110A05A), submersible slurry pumps (80TJQ25-30-7.5), and impellers (EAHF4056QU1 AHF)

• Engine & Powertrain: Main bearings (151-2939), fuel pumps (190-8977), and drive belts (7E4841/8PK1095)

• Filtration & Hydraulics: Diesel filters (1R0749), hydraulic elements (PF951/LP151), and line filters (SPX-06×25)

• Electrical & Safety Systems: Flameproof starters (BQC-32) and air suspension valves (ACN5600)

Our target users—drilling site managers, field technicians, procurement specialists, and maintenance engineers—face persistent challenges including incompatible replacement parts, premature component failure, difficulty sourcing specialized filters and seals, and costly downtime. Our solutions deliver an average 50% reduction in unplanned downtime and 42% lower maintenance costs through superior quality, precise engineering, and reliable compatibility with your existing equipment.

Product Description

Key Product Categories & Technical Specifications

Function Description

Core Functions of Key Products

• o-type sealing ring ZJ70D D4-4-66 Φ310×5.7: Provides reliable hydraulic sealing in high-pressure, high-temperature environments on ZJ70 drilling rigs. Prevents fluid leakage in critical mast and drawworks components, maintaining system pressure integrity and reducing environmental contamination.

• Diesel filter 1R0749: Removes particulate contaminants and water from diesel fuel, protecting the fuel pump (190-8977) and engine from wear and corrosion. Ensures consistent fuel flow and combustion efficiency, even in harsh field conditions.

• Flameproof magnetic starter BQC-32 32A 380V: Safely starts and stops electric motors in hazardous areas with flammable gases or dust. Features automatic overload protection and rapid response time (<0.1s), ensuring personnel and equipment safety while maintaining reliable motor performance.

• Main bearing 151-2939: Supports the engine's main shaft, reducing friction and vibration during operation. Withstands radial loads up to 9,500N and axial loads to 1,500N, ensuring smooth power transmission and extended engine service life.

• Submersible slurry pump 80TJQ25-30-7.5: Transports abrasive slurries, sand, and solid-liquid mixtures with high efficiency. Its robust construction handles up to 10mm particle sizes, making it ideal for mining, construction, and oilfield waste management applications.

Structural Features

Engineering Advantages for Durability & Compatibility

• ZJ70D D4-4-66 Sealing Ring: Manufactured from premium FKM material offering exceptional resistance to hydraulic fluids, acids, and temperatures from -40°C to 200°C. Hardness rated 75-85 Shore A with a dimensional tolerance of ≤0.002mm, ensuring perfect fit and leak-proof performance in ZJ70 drilling rig systems.

• 1R0749 Diesel Filter: 304 stainless steel housing with high-efficiency glass fiber filter media. Quick-connect design for easy replacement, IP65 protection rating, and operating temperature range of -20°C to 120°C. Delivers 99.8% filtration efficiency for particles ≥5μm.

• BQC-32 Flameproof Starter: Carbon steel construction with hermetically sealed enclosure. Silver-plated contacts for superior electrical conductivity, integrated overload and short-circuit protection, and full compliance with IEC 60079 explosion-proof standards.

• 151-2939 Main Bearing: Closed-type ball bearing pre-lubricated with AEROSHELL GR14 high-grade grease. Rolling elements made from high-carbon steel with 62-65 HRC hardness. Withstands radial loads up to 9,500N and axial loads to 1,500N, ensuring long service life even under heavy loads.

• 80TJQ25-30-7.5 Slurry Pump: Cast iron housing with anti-corrosion coating, high-wear-resistant steel impeller, and sealed bearing assembly. Designed for immersion up to 5m and pressure resistance to 0.3MPa, delivering reliable performance in demanding slurry applications.

Operating Conditions

Suitable Operating Environments

All products undergo rigorous testing to ensure reliable performance under challenging industrial conditions:

• Temperature Range: -50°C to 220°C for seals, bearings, and filters; ideal for arctic drilling sites, high-temperature engine compartments, and desert environments

• Pressure Range: 0-45MPa for seals, valves, and pumps, meeting the requirements of high-pressure hydraulic systems and drilling rig components

• Environmental Protection: IP55-IP67 protection for electronics, filters, and pumps; Ex d IIB T4 explosion-proof rating for BQC-32 starter, ensuring resistance to dust, water, and vibrations up to 20g

• Corrosion Resistance: 304/316 stainless steel, FKM, NBR, and anti-corrosion coatings provide exceptional resistance to acids, alkalis, oils, and saltwater, making components suitable for offshore platforms and chemical plants

• Load Capacity: Main bearing 151-2939 handles 9,500N radial load; belt 7E4841/8PK1095 supports 6,000N load; 80TJQ25-30-7.5 pump delivers 30m head, meeting the demands of heavy industrial equipment

Maintenance Recommendations

Care & Maintenance Guidelines

• ZJ70D D4-4-66 & 58×3.55 Seals: Inspect monthly for deformation, cracks, or wear. Apply a thin layer of ISO VG 32 grease before installation to ease mounting. Replace with new seals if leakage is detected or after 12 months of operation.

• 1R0749 & 1R1808 Filters: Replace diesel filter element 1R0749 every 200 operating hours; hydraulic elements PF951/LP151 and 1R1808 every 300 hours. Clean filter housing regularly and use only genuine replacement elements to prevent damage to precision components.

• 80TJQ25-30-7.5 Slurry Pump & G8110A05A Lining: Clean the pump of accumulated slurry every 10 days. Inspect the volute lining every 3 months; replace immediately if wear is detected to prevent damage to the pump housing.

• BQC-32 Starter: Check monthly for proper operation and clean contacts from dust. Inspect enclosure integrity and cable connections every 6 months. Only qualified explosion-proof personnel should perform repairs.

• 151-2939 Bearing: Relubricate with AEROSHELL GR14 every 600 operating hours. Check belt tension monthly—maintain 6-8mm deflection under 100N load. Replace belts if cracks or wear are observed.

Note: All maintenance should be performed by trained technicians following equipment operation manuals. Use only genuine replacement parts—non-original components may cause equipment damage, safety hazards, and costly downtime.

We supply the following spare parts:

Real-World Troubleshooting Cases

Case 1: ZJ70D Drilling Rig Hydraulic Leakage

Problem: Hydraulic fluid leakage observed at a critical connection on a ZJ70D drilling rig, resulting in pressure loss and system malfunction.

Diagnosis: Inspection revealed the o-type sealing ring ZJ70D D4-4-66 Φ310×5.7 was worn, with thickness reduced by 0.8mm.

Solution: Replaced the worn seal with a new ZJ70D D4-4-66 unit, applied anti-seize grease, and performed pressure testing.

Result: Leakage was completely eliminated, system pressure stabilized, and the rig resumed full operation. The component has operated reliably for 10 months without issues.

Case 2: Engine Power Loss Due to Clogged Fuel Filter

Problem: A diesel-powered industrial pump experienced significant power loss and reduced speed, affecting overall system performance.

Diagnosis: Disassembly showed the diesel filter 1R0749 was completely blocked by dirt and metal particles, restricting fuel flow.

Solution: Replaced the 1R0749 filter element, cleaned the filter housing, and flushed the system with clean diesel.

Result: Engine power was restored, speed stabilized, and the pump resumed normal operation with improved efficiency.

Case 3: Main Bearing Failure on Drilling Rig Engine

Problem: A drilling rig's main engine developed excessive noise and vibration, with bearing temperatures exceeding 90°C—well above normal operating limits.

Diagnosis: Inspection identified severe wear on the main bearing 151-2939, with play in the rotating assembly and depleted lubrication.

Solution: Removed the worn bearing, installed a new 151-2939 unit, and relubricated with AEROSHELL GR14 grease. Verified proper shaft alignment.

Result: Noise and vibration were eliminated, bearing temperature returned to normal (≤70°C), and the engine operates smoothly with no further issues.

Frequently Asked Questions (FAQ)

Procurement & Technical Support

We are committed to providing industrial enterprises with high-quality parts that meet or exceed OEM standards, with rigorous quality control at every production stage. Each component undergoes three comprehensive inspections: raw material verification with quality certificates, in-process manufacturing control using coordinate measuring machines, and final functionality testing—ensuring a 99.9% yield rate. Our products offer an optimal price-quality ratio, with costs 21-37% lower than OEM equivalents while maintaining equivalent durability, compatibility, and performance. We provide detailed technical specifications, quality documentation (ISO, API, IEC, GB standards), and material test reports for all products to support informed procurement decisions.

To purchase any of our components—including the ZJ70D D4-4-66 sealing ring, 1R0749 diesel filter, BQC-32 flameproof starter, 151-2939 main bearing, and 80TJQ25-30-7.5 slurry pump—please provide the part number, equipment model, and required quantity. We will promptly prepare a detailed commercial offer, technical specifications, and accompanying quality documents. In addition to product supply, we offer professional technical support: on-site troubleshooting, maintenance consulting, parts selection assistance, and inventory management solutions to help you quickly resolve technical issues and maintain uninterrupted equipment operation.

By choosing our industrial components, you minimize equipment downtime, reduce maintenance costs, and ensure the safe, efficient operation of your industrial assets. We are dedicated to providing reliable products and comprehensive solutions to support your business growth and look forward to serving your procurement and technical support needs with high-quality components and professional expertise.

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.