DQ70BS MB330A, ZJ70D, ZJ-30C & DQ70 Series Supply

Introduction

We focus on the production and supply of high-precision, explosion-proof, and industrial-grade spare parts for oil drilling rigs, boilers, pumps, and hydraulic systems. Our product portfolio perfectly matches core equipment models including ZJ-30C, ZJ-70DB, ZJ70D drilling rigs, DQ70BS, DQ70 series equipment, DW40C0701wg44044012 valve systems, KDB-250FA, WNS1-1.25 boilers, CS33001-0881100 spraying pumps, and triple cylinder plunger pumps (QB-21.63 pump head). Key products cover explosion-proof pressure transmitters (DQ70BS MB330A (0-40MPa) 3808000120), explosion-proof pressure transformers (MB3300-40MPA 3808000120), PDC drill bits (3112mm DM752), steel tooth roller bits (15″ MP2G), and hundreds of essential components—all manufactured to meet API 675, ATEX, and ISO 9001:2015 standards, with a 99.8% compatibility rate with original equipment.

Designed to solve the core pain points of oilfield drilling companies, industrial maintenance teams, and equipment repair workshops—such as frequent part failure, poor explosion-proof performance, mismatched components, and high maintenance costs—our products prioritize reliability, durability, and safety. This document serves as a professional procurement and technical guide, providing detailed product information, real-world repair cases, and practical maintenance advice to help you select the right parts, resolve technical issues efficiently, and ensure continuous, safe operation of your equipment.

Core Purpose & Target User Demand

Core Purpose

Our spare parts are engineered to achieve three core objectives, with data-backed performance to deliver tangible value: First, 100% compatibility with ZJ series drilling rigs, DQ70 series equipment, and industrial boilers/pumps, eliminating assembly failures caused by mismatched components (backed by a 99.8% fit rate in field tests). Second, enhanced durability—critical components such as PDC drill bits (3112mm DM752) offer a service life of 800-1200 drilling hours (20% longer than industry averages), while explosion-proof components meet ATEX Ex d IIB T6 standards, ensuring safe operation in hazardous areas. Third, operational efficiency, reducing equipment downtime by 35% on average and cutting maintenance costs by 28% through high-wear resistance and easy replacement design.

Target User Segmentation & Demand

• Oilfield Drilling Companies: Require explosion-proof and high-performance parts for ZJ-30C, ZJ-70DB, ZJ70D drilling rigs, including explosion-proof pressure transmitters (DQ70BS MB330A), one-way clutches (ZJ-30C), and drill bits (3112mm DM752, 15″ MP2G). Key demands include reliable explosion-proof performance (critical for hazardous drilling environments), stable supply of high-wear parts, and cost-effective solutions to support 24/7 drilling operations.

• Industrial Maintenance Teams: Need easy-to-install, interchangeable parts for boilers (KDB-250FA, WNS1-1.25), pumps (CS33001-0881100 spraying pump, triple cylinder plunger pump), and hydraulic systems. Priorities include quick access to replacement parts (filter elements 478736, FS1000; sealing rings 530301291100000101), clear maintenance instructions, and technical support for complex components (explosion-proof valves, gear pumps P25X378BFIU257).

• Equipment Repair Workshops: Demand a comprehensive inventory of spare parts covering multiple models, including explosion-proof magnetic valves (4WE6J6X/EG24NEXZ2/B08 5126000560), dust-proof plugs (FR-751 5126077008), and brake components (auxiliary brake friction disc 508725 WCB324). Focus on parts with high precision (dimensional tolerance ≤ ±0.005mm for critical components), strong interchangeability, and competitive pricing to ensure repair quality and profitability.

Product Introduction

Our product line covers a wide range of explosion-proof, drilling, and industrial spare parts, all manufactured to original equipment specifications and international standards. Key products include: explosion-proof pressure transmitter DQ70BS MB330A (0-40MPa) 3808000120, piston ring 1613425, free wheel roller 6837976, piston wear ring 13-1/2 60201-02-01j-06, auxiliary brake friction disc 508725 WCB324, friction plate 23041786, oil cooler 7C3039, BALDWIN BW5139 (BW5073, CAT NO: 9N3367) water filter, PDC drill bit 3112mm DM752, high pressure hose assembly P/N 9705010050, bolt P/N-T50-1008K (5/8″×40), throttle cylinder P60266-1/R431005441, imperial connector 520901044801072200, steel tooth roller bit 15″ MP2G, spraying pump CS33001-0881100, boiler KDB-250FA combustion gas assembly PI-8222KDD, filter element 478736, check valve 6882811, high pressure connector and union seal SJS-4*1502, anti-lift safety device FKQ1280-8 DS-FT2, metal film resistors RJ14 1.5KΩ 0.25W, repair kit filter element FS1000, boiler KDB-250FA temperature sensor DKS-503ET-120C, piston ring 3801056, combination valve P50973-1, main drum combination valve P50970-1/P50973-1, high pressure tee 5PK.00.302 Φ6×25×25, pin BK-4-7A3, explosion-proof three port four way valve magnetic 4WE6J6X/EG24NEXZ2/B08 5126000560, ZJ70D REXROTH handle reversing valve 2-HA-1, input shaft E720-11000262, inner and outer elbow joints QBJ6141616, 648401057 bolts housing, ZJ-70DB braking device working pliers pin shaft circlip PSZ75, ZJ-30C one-way clutch, hydraulic air filter EF6-80/5400100012, gear pump P25X378BFIU257, BK-SR-1 sealing ring, boiler WNS1-1.25 CIKACHI FLOALESS water level automatic switch, sealing ring 530301291100000101, universal nitrogen filling tool BK-Z-23, DQ70 seals 5303990530 418057-71AS, big repair kit 9396506 bronze bushing, DW40C0701wg44044012 four constants valve, dust proof plug FR-751 (39) 5126077008, ram body FZ897.21.02.03, 5th gear drive hub 6835605, ring 7T-1885, triple cylinder plunger pump head QB-21.63, dust proof plug FR-502 (33) 5126077007, o-ring 175X5.3 5300100528, clutch assembly LT800*250T, fork type cold press joint HSV 2-4S(1.5-2.5) blue, dust proof plug FR-501 (25) 5126077006, check valve DF8035, and explosion-proof pressure transformer MB3300-40MPA 3808000120. All products undergo 12 strict quality inspection procedures, with a pass rate of 99.9%.

Function Description

Key Component Functions

• Explosion-Proof Components (DQ70BS MB330A Pressure Transmitter, 4WE6J6X Valve): Explosion-proof pressure transmitters (0-40MPa) accurately measure hydraulic/pneumatic pressure in hazardous drilling areas, with a measurement accuracy of ±0.1% FS and compliance with ATEX Ex d IIB T6 standards to prevent ignition in flammable environments. Explosion-proof magnetic valves control fluid flow in hydraulic systems, ensuring safe operation in high-risk zones.

• Drilling Rig Components (ZJ-30C One-Way Clutch, ZJ70D Reversing Valve, Drill Bits): ZJ-30C one-way clutches prevent reverse rotation of drill string components, protecting the transmission system; ZJ70D handle reversing valves control hydraulic flow direction for rig operations; PDC drill bits (3112mm DM752) and steel tooth roller bits (15″ MP2G) drill through rock formations with high efficiency—PDC bits offer a drilling speed of 15-25m/h in medium-hard rock, 30% faster than traditional bits.

• Filter & Sealing Components (BW5139 Water Filter, 478736 Filter Element, Sealing Rings): BALDWIN BW5139 water filters remove 99.5% of impurities (≥10μm) from coolant, protecting boiler and pump components; filter elements (478736, FS1000) filter hydraulic oil and lubricants, extending component life by 40%; sealing rings (530301291100000101, 5300100528) prevent fluid leakage, ensuring system integrity.

• Boiler & Pump Components (KDB-250FA Temperature Sensor, CS33001-0881100 Spraying Pump): KDB-250FA temperature sensors monitor boiler flue gas temperature with an accuracy of ±1℃, ensuring safe combustion; CS33001-0881100 spraying pumps deliver stable fluid flow (0.5-2m³/h) for industrial spraying and cooling applications; triple cylinder plunger pump heads (QB-21.63) handle high pressure (up to 40MPa) for drilling fluid transfer.

• Brake & Safety Components (508725 Friction Disc, FKQ1280-8 Anti-Lift Device): Auxiliary brake friction discs (508725 WCB324) provide reliable braking force for drilling rigs, with a friction coefficient of 0.45 and service life of 500 operating hours; anti-lift safety devices (FKQ1280-8 DS-FT2) prevent accidental lifting of rig components, reducing safety hazards.

Structural Features

Overall Structural Advantages

All our spare parts are manufactured using precision processes and high-quality materials, with structural features optimized for harsh industrial and drilling environments:

• High-Strength & Corrosion-Resistant Materials: Critical components (drill bits, gear hubs, ram bodies) are made of high-grade alloy steel, tungsten carbide (for PDC bits), or bronze (bushings), with a tensile strength of ≥800MPa and corrosion resistance to saltwater, drilling fluid, and industrial chemicals—ideal for offshore and desert drilling environments.

• Precision Machining & Dimensional Accuracy: We use 5-axis CNC machining technology, ensuring dimensional tolerance ≤ ±0.005mm for critical components (e.g., input shafts, valve cores). This guarantees perfect compatibility with original equipment, eliminating assembly gaps and reducing vibration by 25% during operation.

• Explosion-Proof Design: Explosion-proof components (pressure transmitters, valves) feature a flameproof enclosure (IP66 protection rating) and intrinsic safety design, preventing sparks from igniting flammable gases in hazardous areas (ATEX Ex d IIB T6, IECEx certification).

• Modular & Easy-to-Install Design: Most components (filter elements, sealing rings, dust-proof plugs) adopt a modular structure, reducing replacement time by 40% compared to traditional parts. Quick-connect designs (imperial connectors, fork type cold press joints) simplify on-site installation, minimizing equipment downtime.

Applicable Working Conditions

Our spare parts are widely applicable to various industrial and drilling scenarios, with performance tested to meet extreme conditions:

• Onshore & Offshore Oil Drilling: Suitable for ZJ-30C, ZJ-70DB, ZJ70D drilling rigs, adapting to diverse geological conditions (sandstone, shale, limestone) and operating stably at temperatures ranging from -40℃ to 85℃, and pressures up to 40MPa. Explosion-proof components are ideal for hazardous areas (Zone 1, Zone 2) with flammable gas concentrations up to 10% LEL.

• Industrial Boiler & Pump Operations: Compatible with KDB-250FA, WNS1-1.25 boilers, CS33001-0881100 spraying pumps, and triple cylinder plunger pumps, suitable for factories, oil refineries, and wastewater treatment plants—handling high-temperature (up to 120℃) and high-pressure fluids.

• Harsh Environment Operations: Corrosion-resistant seals (DQ70 5303990530), dust-proof plugs (FR-751, FR-502), and heat-treated components can withstand humid, dusty, and corrosive environments (desert oilfields, coastal industrial sites) with a service life retention rate of 85% after 12 months of use.

• Emergency Repair & Routine Maintenance: All spare parts are interchangeable with original equipment, making them suitable for on-site emergency repairs (e.g., brake failure, valve leakage) and daily maintenance of drilling rigs, boilers, and hydraulic systems.

Maintenance and Care Suggestions

Daily Maintenance Guidelines

• Regular Inspection: Check explosion-proof components (DQ70BS MB330A, 4WE6J6X valve) every 100 operating hours for enclosure damage or loose connections—ensure the explosion-proof seal is intact to maintain ATEX certification. Inspect high-wear parts (friction discs 508725, piston rings 1613425) every 150 hours for wear.

• Cleaning & Replacement: Clean BALDWIN BW5139 water filters and 478736/FS1000 filter elements every 200 hours; replace filter elements when the pressure difference exceeds 0.5MPa (tested to ensure optimal filtration efficiency). Clean drill bits (3112mm DM752) after each drilling shift to remove rock debris and extend service life.

• Lubrication Maintenance: Apply high-temperature lubricating oil (meets API GL-4 standard) to rotating components (free wheel roller 6837976, gear pump P25X378BFIU257) every 250 hours. Ensure lubrication coverage of 100% to reduce friction and wear by 30%.

• Storage Requirements: Store spare parts in a dry, ventilated warehouse (humidity ≤ 60%) to avoid moisture damage. Explosion-proof components should be stored in their original packaging to protect the flameproof enclosure; precision components (temperature sensors DKS-503ET-120C) should be stored in shockproof containers.

Precautions for Replacement

When replacing spare parts, follow the original equipment operation manual and note the following to ensure safety and performance:

• Confirm the part number and model (e.g., 5126000560 for explosion-proof valve, 3808000120 for pressure transmitter) to ensure compatibility. Mismatched parts can cause system failure or compromise explosion-proof safety.

• For explosion-proof components, cut off the power supply and ensure the work area is free of flammable gases before replacement. After installation, check the enclosure seal and conduct a pressure test (0.1MPa for 30 minutes) to verify explosion-proof performance.

• Clean the installation area thoroughly to remove impurities and debris. For hydraulic components (high pressure hoses 9705010050, check valves 6882811), flush the pipeline before installing new parts to prevent clogging.

• After installation, conduct a test run to verify normal operation. For pressure transmitters, calibrate the measurement accuracy (±0.1% FS) to ensure accurate data transmission; for brake components, test braking force to confirm safety.

We supply the following spare parts:

On-Site Fault Repair Cases

Below are 3 real on-site repair cases, demonstrating how our spare parts solve common equipment issues efficiently and reliably:

Case 1: Drilling Rig Pressure Measurement Failure Due to Faulty Explosion-Proof Transmitter

Site: Offshore ZJ-70DB drilling rig using DQ70BS MB330A (0-40MPa) pressure transmitter
Fault Phenomenon: Pressure data displayed incorrectly, hydraulic system pressure fluctuated, and the rig’s safety alarm was triggered frequently.
Inspection Result: The original pressure transmitter’s sensor was damaged, with a measurement error exceeding 5% FS, failing to meet explosion-proof safety standards.
Repair Solution: Replace the faulty transmitter with our DQ70BS MB330A explosion-proof pressure transmitter (3808000120), calibrate the sensor to ±0.1% FS, and check the explosion-proof seal.
Effect After Repair: Pressure data was displayed accurately, hydraulic system pressure stabilized, and the safety alarm was eliminated. The transmitter operated reliably in the offshore hazardous area, ensuring continuous drilling operations—no further failures were reported in 6 months of use.

Case 2: Boiler Overheating Due to Faulty Temperature Sensor

Site: Industrial factory using KDB-250FA boiler with DKS-503ET-120C temperature sensor
Fault Phenomenon: Boiler flue gas temperature exceeded the safe limit (120℃), the combustion system failed to adjust automatically, and the boiler shut down intermittently.
Inspection Result: The original temperature sensor had a measurement error of ±3℃, and the sensing element was corroded by flue gas.
Repair Solution: Replace the sensor with our DKS-503ET-120C temperature sensor, adjust the calibration to ±1℃, and install a corrosion-resistant protective cover.
Effect After Repair: The boiler temperature was monitored accurately, the combustion system adjusted automatically to maintain safe operating temperatures, and the boiler operated continuously for 3 months without shutdowns—reducing downtime by 80%.

Case 3: Hydraulic System Leakage Due to Worn Sealing Rings

Site: ZJ-30C drilling rig hydraulic system using 530301291100000101 sealing rings
Fault Phenomenon: Hydraulic oil leakage from the main drum combination valve (P50970-1), system pressure dropped, and the drill string could not be hoisted stably.
Inspection Result: The original sealing rings were worn and cracked, losing their sealing function under high pressure (35MPa).
Repair Solution: Replace the worn sealing rings with our 530301291100000101 sealing rings, clean the valve core, and test the hydraulic system pressure.
Effect After Repair: Hydraulic oil leakage was completely eliminated, system pressure stabilized at 35MPa, and the drill string hoisting function returned to normal. The sealing rings maintained integrity for 400 operating hours—twice the service life of the original parts.

FAQ (Frequently Asked Questions)

Procurement Guide & Technical Support

Procurement Reference Standards

To ensure you select high-quality, compliant, and compatible spare parts, follow these professional procurement guidelines:

• Model & Part Number Verification: Always confirm your equipment model (e.g., ZJ70D, KDB-250FA) and original part number (e.g., 3808000120, 5126000560) to avoid mismatched parts. This is critical for explosion-proof components, as mismatches can compromise safety and compliance.

• Certification Compliance: For explosion-proof parts, verify ATEX, IECEx, or local safety certifications. Our parts meet API 675 (for pressure transmitters), API 7G (for drill bits), and ISO 9001:2015 quality standards—ask for certification documents to ensure compliance with your operational requirements.

• Performance Data & Durability: Prioritize parts with verified performance data (e.g., measurement accuracy, service life, corrosion resistance). For example, our filter elements have a filtration efficiency of 99.5% (≥10μm), and our sealing rings can withstand pressures up to 40MPa—backed by third-party test reports.

• Interchangeability & Easy Replacement: Choose parts with modular designs and quick-connect features to reduce maintenance time. Our parts are 100% interchangeable with original equipment, eliminating the need for modifications and minimizing downtime.

Technical Problem Solution Reference

If you encounter issues with our parts, refer to the following solutions or contact our technical team for personalized support:

• Explosion-Proof Component Issues: If an explosion-proof part fails (e.g., pressure transmitter display error), check the power supply and enclosure seal first. If the issue persists, contact us for a replacement—we ensure certified parts to maintain safety compliance.

• Performance Issues: For reduced drill bit speed, check for wear or debris buildup; replace the bit if the cutter wear exceeds 2mm. For pump leakage, inspect sealing rings and gaskets—our high-pressure seals are designed to withstand 40MPa and resist corrosion.

• Emergency Failures: In case of critical failures (e.g., brake failure, boiler overheating), contact us immediately with your equipment model, part number, and fault description. We will provide a quick troubleshooting solution and expedite the supply of replacement parts to minimize downtime.

• Preventive Maintenance Planning: Our technical team can create customized maintenance plans based on your equipment usage (e.g., 24/7 drilling vs. intermittent operation), helping you extend part service life and reduce maintenance costs by 28% on average.

Conclusion & Procurement Guidance

Our comprehensive range of explosion-proof and industrial spare parts is engineered to meet the rigorous demands of oilfield drilling, boiler operations, and hydraulic systems. Covering ZJ-30C/ZJ-70DB/ZJ70D drilling rigs, DQ70BS/DQ70 series equipment, KDB-250FA/WNS1-1.25 boilers, and a wide range of pumps and valves, our products deliver 100% compatibility, ATEX-certified explosion-proof performance, and industry-leading durability—backed by strict quality control, verified data, and professional technical support.

Whether you need explosion-proof components (DQ70BS MB330A pressure transmitter, 4WE6J6X valve), drilling tools (3112mm DM752 PDC bit, 15″ MP2G steel tooth bit), filter elements (BW5139, 478736), or sealing components (530301291100000101), we have the right parts to keep your equipment running safely and efficiently. Our parts reduce downtime by 35%, cut maintenance costs by 28%, and ensure compliance with international safety standards—delivering tangible value for your operations.

If you are in need of purchasing any of our spare parts, contact us to discuss your specific requirements. We can provide customized supply solutions, pre-sales compatibility checks, and after-sales technical support to ensure you get the right parts for your equipment. Choose our spare parts to ensure safe, reliable, and cost-effective operation of your drilling and industrial 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.