BK, YX, TK Series Hydraulic Brake Core Components with DG17V, PSZ75B and QUQ2 Supporting Parts

1. Core Application Purpose & Target User Demand

This integrated set of BK structural parts, YX sealing and caliper components, TK valve and frame accessories and supporting DG17V parking brake valves, PSZ75B mounting bases and QUQ2 air filters is professionally manufactured for heavy-duty hydraulic braking systems applied in oilfield drilling and workover rigs. It caters specifically to field maintenance engineers, equipment overhaul teams and industrial mechanical parts procurement personnel, solving common high-frequency faults including brake cylinder jamming, hydraulic sealing leakage, valve group control delay, support arm structural loosening and poor heat dissipation under long-term heavy-load cyclic operation. All components comply with GB, JB/T national mechanical and hydraulic industry standards, with operational reliability verified through 8900 hours of continuous field endurance testing. This product suite provides standardized procurement parameter benchmarks and practical on-site fault elimination solutions, meeting dual core demands of standardized parts replacement and professional hydraulic system technical maintenance.

2. Product Introduction

This full supporting product portfolio covers all core functional and wearable accessories for complete hydraulic brake systems. It includes YX series emergency and service caliper cylinder assemblies, copper bushes, adjusting nuts, steel backings and cover plates, BK series support arms, clevis pins, cylinder covers, handles and disc springs, and TK series valve groups, steel plates, washers and protective covers. The lineup also contains DG17V parking brake valves, BK-F-S brake valves, BK-F-Q air-operated reversing valves, ML2 plum couplings, KMCL-3Y04 coolers and QUQ2 air filters, matched with standard fasteners, circlips, grease cups and JB/JB984 standard pipe joints. Every accessory adopts precision finishing and anti-fatigue heat treatment, featuring high assembly accuracy and structural interchangeability, fully adapting to mainstream oilfield hydraulic brake equipment for daily maintenance and periodic full overhaul.

3. Core Functional Description

3.1 Stable Hydraulic Braking Execution

YX emergency and service caliper cylinder assemblies cooperate with BK disc springs and copper bushes to form precise braking execution structures. This configuration resolves the core pain points of uneven braking force and slow reset caused by internal component wear and friction resistance, ensuring stable and sensitive braking action under variable heavy-load working conditions.

3.2 Reliable Hydraulic & Pneumatic Control

DG17V parking brake valves, BK-F series brake valves and BK-F-Q reversing valves build a complete hydraulic and pneumatic control loop. Paired with QUQ2 air filters and TK valve groups, they eliminate pipeline blockage and control delay faults, maintaining accurate hydraulic signal transmission and stable system switching.

3.3 Durable Sealing & Structural Protection

BK-SR series multi-specification sealing rings and standard connector assemblies achieve full-circuit sealing protection, effectively preventing hydraulic medium leakage and external dust invasion. Matching support arms, mounting bases and pin shaft components fix the overall structural layout, avoiding operational jitter and structural deviation caused by long-term vibration.

4. Structural Characteristics

All accessories adopt modular standardized structural design with unified industrial assembly tolerance benchmarks, supporting rapid on-site disassembly and replacement without secondary precision calibration. Core caliper cylinder parts adopt high-pressure resistant integral machining, with strong deformation resistance under long-term hydraulic impact. Optimized copper bush and disc spring structures reduce internal friction loss and compensate braking gaps automatically. Multi-layer sealing matching and standardized fastener combinations effectively resist structural loosening and medium leakage induced by continuous mechanical vibration in field environments.

5. Applicable Working Conditions

This series of hydraulic brake components is suitable for onshore oilfield drilling rigs, workover equipment and heavy hoisting machinery hydraulic braking and control systems. It stably adapts to harsh open-air working environments with ambient temperatures ranging from -25℃ to 68℃, high dust concentration and continuous vibration impact, maintaining stable hydraulic transmission, pneumatic control and braking performance under long-term intermittent heavy-load and high-frequency start-stop cyclic operation.

6. On-site Maintenance Suggestions (Engineer Practical Experience)

Based on years of frontline oilfield maintenance experience, BK-SR sealing rings and caliper wearable parts require inspection every 3 months and full replacement every 8 months to prevent leakage and braking attenuation. Pin shafts, copper bushes and support arm sleeves need regular grease injection through standard grease cups to eliminate dry friction loss. Valve groups and air filter components should be cleaned regularly to avoid dirt blockage affecting control accuracy. Mismatched fastener assembly is strictly prohibited, as it will cause cylinder jamming and structural deviation. Standardized maintenance can extend the continuous stable operation duration of matched hydraulic systems by 2800 working hours compared with random maintenance modes.

We supply the following spare parts:

7. Field Fault Maintenance Cases

7.1 Hydraulic Leakage Fault in Daqing Oilfield

Location: Daqing Oilfield, Heilongjiang; Equipment Model: Drilling rig hydraulic brake system; Operating Load: 89% rated load; Fault Data: Cylinder joint oil seepage, 0.8MPa system pressure drop; Repair Scheme: Replace aging BK-SR sealing rings and worn copper bush; Post-repair Index: Zero leakage, hydraulic pressure fully restored to rated standard; Customer Feedback: Braking hydraulic system maintains long-term stable pressure holding performance.

7.2 Brake Cylinder Stagnation Fault in Tarim Oilfield

Location: Tarim Oilfield, Xinjiang; Equipment Model: Heavy workover rig YX caliper assembly; Operating Load: full continuous load; Fault Data: Emergency cylinder movement stagnation, delayed braking response; Repair Scheme: Replace deformed support arm sleeve and clean internal oil circuit; Post-repair Index: Cylinder movement flexible, braking response recovers factory standard; Customer Feedback: Braking action sensitivity meets field construction requirements.

7.3 Pneumatic Control Delay Fault in Changqing Oilfield

Location: Changqing Oilfield, Shaanxi; Equipment Model: BK-F-Q reversing valve matching system; Operating Load: 85% rated load; Fault Data: Pneumatic switching delay, unstable braking state conversion; Repair Scheme: Clean QUQ2 air filter and replace aging pipe connector; Post-repair Index: Pneumatic control response normal, system switching accurate; Customer Feedback: Control system fault completely eliminated, operation stable.

7.4 Structural Loosening Fault in Shengli Oilfield

Location: Shengli Oilfield, Shandong; Equipment Model: PSZ75B base mounting assembly; Operating Load: intermittent heavy load; Fault Data: Support arm structural loosening, slight equipment jitter; Repair Scheme: Replace worn clevis pin and re-fasten standard fasteners; Post-repair Index: Structural stability restored, no operational jitter; Customer Feedback: Overall equipment operation smooth and reliable.

8. Product FAQ

9. Technical Standard & Procurement Guidance

All products are manufactured and inspected in strict accordance with GB5782-86, GB894.2-86, JB/T7940.4-1995 and other authoritative national and industrial specifications, with complete field test data and performance verification to meet petroleum machinery industrial-grade operation standards. This full set of BK, YX, TK series and supporting hydraulic and pneumatic brake components provides unified and standardized procurement specifications for daily maintenance, parts renewal and overall equipment overhaul of oilfield hydraulic braking systems. It also acts as a professional technical reference for on-site operators to diagnose cylinder stagnation, sealing leakage, control delay and structural loosening faults, guiding standardized disassembly, assembly and maintenance operations. Fully verified by long-term practical application in multiple major oilfields, the product portfolio delivers excellent environmental adaptability and long-cycle operational durability. Users can select targeted matching accessories according to actual equipment models, operating loads and fault characteristics to complete refined equipment maintenance, stabilize hydraulic braking system performance and reduce overall equipment failure frequency.