Core Application & Target User Demand
This document covers spare parts for the Pneumatic Control System of BOMCO Drawworks models, including JC-90, JC-70, JC-50, JC-40, JC-90DB, JC-70DB, JC-50DB, JC-40DB, JC-90D, JC-70D, and JC-5. Tailored for oil & gas drilling operation teams, professional pneumatic system maintenance providers, and mining machinery spare part purchasers, these parts are crucial for stable air pressure transmission, precise control of drawworks actuators, and safe operation. They address the core demands for airtight, corrosion-resistant, and standard-compliant spare parts, as well as professional technical support to prevent air leakage, pressure loss, and control failure.
Pneumatic Control System Identification & Fixing Parts
Identification and fixing parts (nameplates, rivets) ensure equipment traceability and component fixation. In harsh drilling environments with vibration, dust, and moisture, nameplates are prone to fading or falling off, while rivets may loosen or corrode, affecting equipment management and component stability. These parts are designed for durability and reliable fixation.
No. | Part Number & Name | Material | Main Wear Reasons | Damage Prevention Notes |
1 | AF700309-0201 Nameplate I | Aluminum alloy with anodized coating; printing: UV-curable ink | 1. Fading of printed information due to long-term exposure to sunlight and wind; 2. Peeling caused by vibration and impact during drilling operations | 1. Apply a layer of protective varnish to the surface to resist UV radiation; 2. Check the fixing status regularly and re-fasten if loose |
2 | AF700309-0202 Nameplate I | Aluminum alloy with anodized coating; printing: UV-curable ink | 1. Corrosion of aluminum substrate due to humid and salty on-site environment; 2. Scratching of printed information by foreign objects | 1. Choose anti-corrosion anodizing process (thickness ≥ 15μm); 2. Install a transparent protective cover to avoid direct contact with foreign objects |
3 | AF700309-0203 Nameplate I | Aluminum alloy with anodized coating; printing: UV-curable ink | 1. Loosening of fixing rivets due to cyclic vibration; 2. Damage caused by chemical corrosion from drilling fluids | 1. Use anti-loosening rivets for fixation; 2. Clean the surface in time if contaminated by drilling fluids |
4 | AF700309-020A Nameplate 17 | Aluminum alloy with anodized coating; printing: UV-curable ink | 1. Deformation caused by impact during equipment transportation or maintenance; 2. Fading due to high-temperature radiation from nearby equipment | 1. Handle with care during transportation and maintenance to avoid impact; 2. Keep away from high-temperature equipment (distance ≥ 50cm) |
5 | AF500303-1005 Nameplate V | Stainless steel (304); printing: laser engraving | 1. Oxidation of surface due to long-term exposure to humid air; 2. Wear of engraved information due to repeated friction | 1. Wipe the surface with anti-rust oil regularly; 2. Avoid unnecessary friction on the nameplate surface |
6 | AF500303-1006 Nameplate 71 | Stainless steel (304); printing: laser engraving | 1. Loosening of installation due to vibration; 2. Corrosion caused by contact with acidic or alkaline substances | 1. Re-check and fasten the installation after each major drilling operation; 2. Isolate from acidic/alkaline substances with protective film if necessary |
7 | AF500303-1007 Dunnage | Rubber (EPDM), wear-resistant and anti-aging | 1. Aging and hardening caused by long-term sunlight and high temperature; 2. Wear due to friction with components during vibration | 1. Store in a cool and dry place when not in use; 2. Replace if cracks or hardening occur (hardness change ≥ 10 Shore A) |
8 | A20999050603000600 Nameplate Rivet 3X6 | Aluminum alloy (5052), light and corrosion-resistant | 1. Shear failure due to cyclic vibration; 2. Corrosion of shaft due to humid environment | 1. Choose rivets with sufficient shear strength (≥ 15MPa); 2. Apply anti-corrosion coating to the rivet surface before installation |
Pneumatic Control System Connection Components
Connection components (joints, nuts, pipe sleeves, hoses, copper pipes) are the core of pneumatic pressure transmission. In high-pressure and vibration environments, air leakage, thread wear, or pipe damage can lead to pressure loss and control failure. These components adopt precision machining and airtight design, ensuring reliable pressure transmission.
Joints & Nuts
Joints and nuts realize the connection between different pneumatic components. Thread wear, improper sealing, or corrosion can cause air leakage, affecting system pressure stability. These components comply with pneumatic connection standards, ensuring good airtightness and compatibility.
No. | Part Number & Name | Material | Main Wear Reasons | Damage Prevention Notes |
1 | T001-0110 Joint M22X1.5-R 3/A | Brass (H62), nickel-plated for corrosion resistance; sealing ring: nitrile rubber (NBR 70) | 1. Thread wear due to repeated assembly and disassembly; 2. Sealing failure caused by damaged sealing ring | 1. Use thread sealant complying with GB/T 14074-2017 during installation; 2. Replace the sealing ring every time the joint is disassembled |
2 | 520901150055020000 Joint M22X1.5-R1/2 | Brass (H62), nickel-plated; sealing ring: NBR 70 | 1. Corrosion of thread in humid and dusty environment; 2. Loosening caused by resonant vibration during drilling | 1. Clean threads and apply anti-corrosion grease before installation; 2. Use a torque wrench to tighten to specified torque (45-55N·m) |
3 | 520901150071020000 Nut M22X1.5 | Brass (H62), nickel-plated | 1. Thread damage caused by over-tightening; 2. Corrosion of surface due to harsh on-site environment | 1. Strictly control tightening torque, avoiding exceeding 60N·m; 2. Inspect surface plating regularly and touch up if damaged |
4 | 52090115009A020000 Nut M16X1.5 | Brass (H62), nickel-plated | 1. Fatigue failure of thread due to long-term vibration; 2. Damage caused by foreign particles during assembly | 1. Use anti-loosening washers to absorb vibration; 2. Clean threads thoroughly to remove foreign particles before installation |
5 | 520901150009020000 Joint M16X1.5G-R1/A | Brass (H62), nickel-plated; sealing ring: NBR 70 | 1. Sealing leakage caused by improper installation angle; 2. Wear of joint surface due to relative rotation | 1. Ensure the installation angle is correct (coaxiality tolerance ≤ 0.02mm); 2. Avoid unnecessary rotation of the joint after installation |
6 | 520901150016020000 Joint M16X1.5G-R1/2 | Brass (H62), nickel-plated; sealing ring: NBR 70 | 1. Corrosion of internal flow channel due to compressed air moisture; 2. Damage caused by impact during transportation | 1. Install a dryer in the pneumatic system to reduce air moisture (dew point ≤ -20℃); 2. Use shock-absorbing packaging during transportation |
7 | 520901150098020000 Bulkhead joint Rd/A-M16X1.5G | Brass (H62), nickel-plated; sealing ring: fluorine rubber (FKM) | 1. Sealing failure caused by aging of FKM sealing ring; 2. Deformation of flange due to uneven tightening force | 1. Replace the sealing ring every 1200 working hours; 2. Tighten the fixing bolts evenly in a cross pattern |
8 | 520901150060020000 Nut M16X1.5 | Brass (H62), nickel-plated | 1. Thread wear due to repeated disassembly; 2. Corrosion caused by contact with drilling fluids | 1. Minimize unnecessary disassembly; 2. Clean the nut immediately if contaminated by drilling fluids |
9 | 52090115000A020000 Hose joint 416X428 | Brass (H62), nickel-plated; clamping sleeve: stainless steel (304) | 1. Loosening of clamping sleeve due to vibration; 2. Wear of joint core due to hose movement | 1. Check the clamping status regularly and re-clamp if loose; 2. Fix the hose to reduce movement during operation |
10 | 520901150014020000 Joint M22X1.5-NPT1/2 | Brass (H62), nickel-plated; sealing ring: NBR 70 | 1. Thread wear caused by incompatible thread standards; 2. Sealing leakage due to insufficient thread sealant | 1. Confirm thread standard compatibility before installation; 2. Apply an appropriate amount of thread sealant (coating thickness 0.2-0.3mm) |
11 | 520203080200150002 Inner joint NPT1/2 | Brass (H62), nickel-plated; sealing ring: FKM | 1. Corrosion of internal thread due to compressed air impurities; 2. Damage caused by improper installation tools | 1. Install a filter in the front end of the joint (filtration precision 5μm); 2. Use special tools for installation to avoid thread damage |
12 | 520902900200003015 Rotary Joint XJ-L15 | Steel (45#), quenched and tempered; sealing ring: FKM; bearing: GCr15 | 1. Sealing failure caused by bearing wear; 2. Corrosion of rotating surface due to humid environment | 1. Lubricate the bearing regularly with high-temperature grease; 2. Apply anti-corrosion paint to the outer surface |
13 | 520901150013020000 Joint NPT1/4-M16X1.5 | Brass (H62), nickel-plated; sealing ring: NBR 70 | 1. Loosening caused by small thread diameter and high vibration; 2. Sealing ring damage due to excessive compression | 1. Use thread locking adhesive for anti-loosening; 2. Control compression amount of sealing ring within 25-30% |
15 | 520901150053020000 Angle-Coupling NPT1/4-M16X1.5 | Brass (H62), nickel-plated; sealing ring: NBR 70 | 1. Fatigue cracking at the angle due to long-term vibration; 2. Thread wear due to repeated assembly | 1. Check for cracks with magnetic particle inspection every 1500 working hours; 2. Avoid over-tightening during assembly |
16 | 520901150003020000 Hose joint 410X419 | Brass (H62), nickel-plated; clamping sleeve: stainless steel (304) | 1. Clamping sleeve deformation caused by over-clamping; 2. Wear of joint due to hose bending | 1. Control clamping force to avoid sleeve deformation; 2. Ensure hose bending radius ≥ 8×hose diameter |
17 | 520206030250200002 Swedged Female Joint R1-R3/A | Brass (H62), nickel-plated; sealing ring: FKM | 1. Sealing failure caused by swaging process defects; 2. Corrosion of swaged surface due to humid environment | 1. Inspect swaging quality before installation (no cracks or deformation); 2. Apply anti-corrosion grease to the swaged surface |
18 | 520201040400250002 Onion Swivel Rd | Brass (H62), nickel-plated; sealing ring: FKM; bearing: GCr15 | 1. Rotation failure caused by bearing jamming; 2. Sealing leakage due to sealing ring wear | 1. Keep the swivel clean and lubricate regularly; 2. Replace the sealing ring when rotation resistance increases |
Pipes, Hoses & Pipe Accessories
Pipes, hoses, and pipe accessories (pipe sleeves, pipe clips) are responsible for air transmission and fixation. In drilling environments with vibration and temperature changes, pipes are prone to bending, hoses to aging, and pipe clips to loosening, affecting system airtightness. These components are designed for flexibility and durability.
No. | Part Number & Name | Material | Main Wear Reasons | Damage Prevention Notes |
1 | 520901150086020000 Pipe sleeve 16 | Copper (T2), soft and easy to deform for sealing | 1. Deformation failure due to excessive compression; 2. Corrosion caused by humid environment | 1. Control compression amount within 30-40% of original thickness; 2. Apply anti-corrosion coating before installation |
2 | 520001150083020000 Pipe sleeve 10 | Copper (T2) | 1. Wear of inner wall due to compressed air impurities; 2. Damage caused by improper installation tools | 1. Ensure compressed air cleanliness (particle count ≤ 19/16 per ISO 4406); 2. Use special installation tools to avoid deformation |
3 | T005-010.00 Pipe clip assembly ©19 | Steel strip (Q235A) + rubber pad (EPDM) | 1. Rubber pad aging due to long-term sunlight and high temperature; 2. Steel strip deformation caused by excessive clamping force | 1. Replace rubber pad every 1000 working hours; 2. Adjust clamping force to avoid pipe deformation |
4 | 140501050100100000 Hose 010X019 | Inner tube: NBR; reinforcement: high-strength polyester fiber; outer cover: CR | 1. Fatigue cracking of outer cover due to repeated bending; 2. Inner tube damage caused by compressed air moisture | 1. Avoid frequent bending and ensure minimum bending radius ≥ 6×hose diameter; 2. Install a water separator in the pneumatic system |
5 | 1A0501050160100000 Hose 016X028 | Inner tube: NBR; reinforcement: high-strength polyester fiber; outer cover: CR | 1. Outer cover wear due to friction with other components; 2. Aging and hardening caused by high temperature (＞80℃) | 1. Install a protective sleeve at the friction position; 2. Avoid using in high-temperature areas (operating temperature ≤ 80℃) |
6 | 51102010100010001 Copper Pipe 010X1 | Copper (TP2), oxygen-free and corrosion-resistant | 1. Bending deformation caused by impact during maintenance; 2. Corrosion of surface due to humid environment | 1. Use a pipe bender for bending to avoid wrinkles; 2. Wipe the surface with anti-rust oil regularly |
7 | 51102010160010001 Copper Pipe 016X1.5 | Copper (TP2) | 1. Fatigue cracking at the bending position due to vibration; 2. Damage caused by freezing in low-temperature environments | 1. Reduce the number of bending positions as much as possible; 2. Take heat preservation measures in low-temperature environments (＜-10℃) |
Pneumatic Control System Valves & Filter Components
Valves and filters are key to controlling air pressure and ensuring air quality. Valve jamming, seal wear, or filter clogging can lead to control failure and component damage. These components are designed for precise control and efficient filtration, ensuring stable system operation.
No. | Part Number & Name | Material | Main Wear Reasons | Damage Prevention Notes |
1 | 512704070600100000 Rapid escape valve NPT 1/2 | Valve body: aluminum alloy (6061); spool: stainless steel (304); sealing ring: FKM | 1. Spool jamming caused by compressed air impurities; 2. Sealing failure due to sealing ring aging | 1. Install a pre-filter in front of the valve (filtration precision 5μm); 2. Clean the valve body and replace the sealing ring every 1500 working hours |
2 | 512701010002000004 Valve Terminal Control Box | Housing: aluminum alloy (6063); internal valves: brass (H62); electronic components: industrial grade | 1. Internal valve jamming due to air moisture; 2. Damage to electronic components caused by vibration and dust | 1. Ensure the pneumatic system is dry (dew point ≤ -20℃); 2. Keep the control box sealed and clean, and check the sealing gasket regularly |
3 | 512605520100200000 Filter | Housing: aluminum alloy (6061); filter element: glass fiber; sealing ring: NBR 70 | 1. Filter element clogging due to excessive dust in the drilling environment; 2. Sealing leakage caused by damaged sealing ring | 1. Clean or replace the filter element every 500 working hours per GB/T 25984-2010; 2. Replace the sealing ring when replacing the filter element |
4 | 512704070200050600 O-Matic Valve FP-L6A | Valve body: brass (H62); spool: stainless steel (304); sealing ring: FKM | 1. Spool wear due to long-term high-frequency operation; 2. Corrosion of valve body due to humid environment | 1. Lubricate the spool regularly with pneumatic special oil; 2. Apply anti-corrosion paint to the valve body surface |
Pneumatic Control System Fasteners
Fasteners (bolts, screws, spring washers) fix components of the pneumatic control system. In high-vibration drilling environments, loosening, fatigue failure, or corrosion can lead to component displacement and system failure. These fasteners comply with national standards, ensuring high strength and anti-loosening performance.
No. | Part Number & Name | Material | Main Wear Reasons | Damage Prevention Notes |
1 | 420201080612050070 Bolt M12X50 | Alloy steel (8.8 grade), galvanized for corrosion resistance | 1. Loosening caused by resonant vibration during drilling; 2. Tensile fatigue failure due to over-tightening | 1. Use spring washers and thread locking adhesive for anti-loosening; 2. Tighten to specified torque (65-75N·m) with calibrated torque wrench |
2 | 420503010121600000 Spring Washer 12 | Carbon steel (65Mn), heat treatment (hardness HRC 42-48) | 1. Fatigue failure caused by repeated compression and relaxation; 2. Deformation caused by improper installation | 1. Replace spring washers every time bolts are disassembled; 2. Ensure washers are installed in the correct direction (opening faces the nut) |
3 | 420101050705001006 Screw M5X10 | Carbon steel (4.8 grade), galvanized for corrosion resistance | 1. Thread wear due to repeated assembly and disassembly; 2. Corrosion of screw shaft due to humid environment | 1. Avoid unnecessary repeated disassembly; 2. Apply anti-corrosion grease to threads in humid environments |
4 | 420503010051600000 Spring Washer 5 | Carbon steel (65Mn), heat treatment | 1. Wear of washer surface due to friction; 2. Breakage caused by excessive compression | 1. Check washer surface for wear before installation; 2. Control compression amount within 15-20% of washer thickness |
On-Site Fault Maintenance Case
Case 1: Pneumatic Control System Pressure Loss Caused by Joint Air Leakage
Fault Phenomenon: During operation of BOMCO JC-90 drawworks, the pneumatic control system showed abnormal pressure loss, and the actuator response speed slowed down significantly. The system pressure gauge indicated that the pressure dropped from the rated 0.6MPa to 0.3MPa within 10 minutes of shutdown.
Fault Diagnosis: Using a soapy water leak detection method, the maintenance team found that the 520901150014020000 Joint M22X1.5-NPT1/2 had severe air leakage. Disassembly inspection revealed that the thread of the joint was worn, and the NBR sealing ring was aged and cracked. The root cause was repeated assembly during previous maintenance and long-term use of the sealing ring beyond its service life.
Maintenance Process: 1. Replace the worn joint with a new one of the same model; 2. Replace the aged NBR sealing ring with a new one (complying with GB/T 3452.1-82); 3. Apply an appropriate amount of thread sealant to the new joint's thread and tighten it to the specified torque (45-55N·m) with a torque wrench; 4. Conduct a leak test with soapy water to confirm no air leakage; 5. Re-test the system pressure, which recovered to the rated 0.6MPa, and the actuator response speed returned to normal.
Preventive Measures: 1. Establish a regular joint inspection system, using soapy water to detect leaks every 300 working hours; 2. Replace sealing rings of key joints every 1200 working hours, regardless of their appearance; 3. Train maintenance personnel to use torque wrenches for joint installation to avoid thread wear caused by over-tightening.
Case 2: Valve Terminal Control Box Failure Caused by Filter Clogging
Fault Phenomenon: During drilling operation of BOMCO JC-70 drawworks, the pneumatic control system's valve terminal control box (512701010002000004) failed, leading to the inability to control the drawworks' lifting and lowering actions. The on-site alarm was triggered, and the system was forced to shut down.
Fault Diagnosis: After disassembling the valve terminal control box, it was found that the internal valves were jammed by a large amount of dust and impurities. Further inspection showed that the front-end 512605520100200000 Filter was severely clogged, and the filter element had lost its filtration function. The root cause was that the filter element was not replaced in time, resulting in impurities entering the control box and jamming the valves.
Maintenance Process: 1. Replace the clogged filter element with a new one; 2. Disassemble the internal valves of the control box, clean them thoroughly with pneumatic special cleaning agent, and check for wear (replace if necessary); 3. Clean the control box's inner cavity to remove dust and impurities; 4. Reassemble the control box and valves, and check the sealing performance; 5. Test run the system, confirming that the valve terminal control box works normally, and the drawworks' lifting and lowering actions are restored.
Preventive Measures: 1. Shorten the filter element replacement cycle from 500 to 300 working hours for dusty drilling environments; 2. Install a differential pressure gauge on the filter to monitor the pressure difference (replace the filter element when the pressure difference exceeds 0.1MPa); 3. Strengthen the sealing of the control box to prevent dust from entering.
Procurement Guide & Technical Support
All parts listed in this document are fully compatible with BOMCO Drawworks JC series models (JC-90, JC-70, JC-50, JC-40, JC-90DB, JC-70DB, JC-50DB, JC-40DB, JC-90D, JC-70D, JC-5) and comply with national and industry standards such as GB/T 3452.1-82, GB/T 14074-2017, and Q/BOMCO 005-2024. Choosing these standard-compliant, high-quality spare parts can effectively ensure the airtightness, stability, and reliability of the pneumatic control system, reduce maintenance downtime, and guarantee the safe and efficient operation of the drawworks.
We provide professional technical support for all purchased parts, including on-site installation guidance, pneumatic system fault diagnosis, and customized maintenance solutions. If you have procurement needs for the parts mentioned in this document, please contact our sales team. Our team will provide you with reliable product supply and efficient technical services to meet your drilling equipment operation and maintenance needs.
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