QH-25, BK, YX & TK Series Hydraulic Brake System Core Components

1. Core Purpose & Target User Demand Orientation

This comprehensive set of industrial-grade components centered on QH-25 manual pump, BK series brake parts, YX series sealing accessories and TK series valve and frame assemblies is professionally engineered for heavy-duty hydraulic brake systems used in onshore oilfield drilling and workover rigs. It precisely serves field maintenance technicians, equipment overhaul teams and industrial parts procurement personnel, targeting prevalent operational pain points including insufficient manual hydraulic pressure output, caliper cylinder jamming, sealing aging leakage, pipe joint pressure loss and brake pad friction attenuation under long-duration heavy-load cyclic operation. All components comply with GB national mechanical standards and JB hydraulic industry specifications, with operational stability validated through 8800 hours of continuous field endurance testing. This product suite delivers unified procurement calibration standards and actionable on-site fault resolution schemes, covering users’ dual demands for standardized parts replacement and professional hydraulic system technical maintenance.

2. Product Overview

This full supporting portfolio covers all core functional and wearable parts for complete hydraulic brake systems, including QH-25 manual hydraulic pumps and QJH-15G globe valves for hydraulic power control, BK series emergency and service caliper cylinder assemblies, brake pads, steel backings, sleeves and retaining rings, and YX series multi-specification sealing rings, O-rings, lock nuts and axle sleeves. It is also equipped with TK series guide rods, valve groups and mounting frames, KMCL-3Y04 coolers, BGY2-220/1 explosion-proof heaters, JB standard pipe joints and full sets of national standard bolts, washers and circlips. Every part adopts precision mechanical finishing and anti-fatigue forging processing, featuring high assembly tolerance accuracy and cross-part interchangeability, fully matching mainstream oilfield hydraulic braking system configurations for routine upkeep and complete equipment overhaul.

3. Core Functional Description

3.1 Reliable Hydraulic Power & Temperature Control

The QH-25 manual pump and QJH-15G globe valve form stable manual hydraulic power input and flow regulation, solving the pain point of unregulated hydraulic pressure during equipment debugging and emergency braking. Matched KMCL-3Y04 coolers and BGY2-220/1 explosion-proof heaters maintain constant hydraulic oil temperature, avoiding system performance instability caused by extreme temperature changes in field environments.

3.2 Precise Braking Execution Performance

BK series service and emergency caliper cylinder assemblies cooperate with BK brake pads and disc springs to achieve responsive and uniform braking output. This structure eliminates delayed braking and uneven friction caused by cylinder wear and spring fatigue, ensuring reliable braking action under variable heavy-load working conditions.

3.3 Full-Circuit Sealing & Connection Stability

YX series sealing rings and O-rings, paired with JB standard pipe joints and union couplings, build fully sealed hydraulic circuits. They block hydraulic medium leakage and external dust intrusion, resolving common field faults such as pipeline pressure drop and circuit blockage caused by aging sealing components and loose joints.

4. Structural Characteristics

All accessories adopt modular standardized structural design with unified industrial assembly benchmarks, supporting rapid on-site disassembly and installation without secondary precision calibration. Core hydraulic cylinder components adopt high-pressure resistant integral machining, with strong deformation resistance under long-term hydraulic impact. Built-in BK guide bands and TK guide rods optimize linear movement accuracy of moving parts, while disc spring assemblies provide stable elastic compensation for braking gaps. Multi-layer sealing matching structure and standardized fastener combinations effectively resist structural loosening and medium leakage induced by long-term mechanical vibration.

5. Applicable Working Conditions

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

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

Summarized from frontline oilfield maintenance practice, YX sealing rings and cylinder moving parts require inspection every 3 months and full replacement every 8 months to prevent leakage failure. All pin sleeves and guide rods need regular grease injection via standard grease cups to eliminate dry friction loss. Hydraulic valve groups and pipeline joints should be cleaned and fastened periodically to avoid oil dirt accumulation and pressure loss. Mismatched fastener assembly is strictly prohibited, as it will cause cylinder jamming and braking deviation. Standardized maintenance can extend the continuous stable operation duration of matched hydraulic systems by 2700 working hours compared with random maintenance modes.

We supply the following spare parts:

7. Field Fault Maintenance Cases

7.1 Hydraulic Pressure Insufficiency Fault in Daqing Oilfield

Location: Daqing Oilfield, Heilongjiang; Equipment Model: Drilling rig hydraulic brake system; Operating Load: 89% rated load; Fault Data: QH-25 manual pump pressure insufficient, 0.8MPa pressure loss; Repair Scheme: Replace aging YX-SR sealing rings and worn guide band; Post-repair Index: Hydraulic pressure reaches rated standard, stable pressure holding; Customer Feedback: Manual pressure regulation and emergency braking function fully recovered.

7.2 Caliper Cylinder Stagnation Fault in Tarim Oilfield

Location: Tarim Oilfield, Xinjiang; Equipment Model: Heavy workover rig brake caliper assembly; Operating Load: full continuous load; Fault Data: BK service cylinder movement stagnation, slow braking response; Repair Scheme: Replace deformed BK sleeve and clean internal hydraulic circuit; Post-repair Index: Cylinder movement flexible, braking response time restored to factory index; Customer Feedback: Braking system operates smoothly in long-hour continuous operation.

7.3 Pipeline Leakage Fault in Changqing Oilfield

Location: Changqing Oilfield, Shaanxi; Equipment Model: TK30 valve group hydraulic circuit; Operating Load: 85% rated load; Fault Data: Pipe joint oil seepage, sustained system pressure fluctuation; Repair Scheme: Replace failed GB1235-76 O-ring and aging JB984 connector; Post-repair Index: Zero circuit leakage, pressure fluctuation completely eliminated; Customer Feedback: Hydraulic circuit stability significantly improved.

7.4 Braking Friction Attenuation Fault in Shengli Oilfield

Location: Shengli Oilfield, Shandong; Equipment Model: Field hoisting equipment brake system; Operating Load: intermittent heavy load; Fault Data: BK brake pad friction attenuation, prolonged braking distance; Repair Scheme: Replace worn brake pad and fatigued disc spring; Post-repair Index: Braking friction stable, braking distance fully compliant with industry standards; Customer Feedback: Braking safety and accuracy meet field construction requirements.

8. Product FAQ

9. Technical Standard & Procurement Guidance

All products are manufactured and inspected in strict accordance with GB6170-86, GB70-85, JB984 and other authoritative national and industrial standards, with complete field test data and performance verification to meet petroleum machinery industry grade specifications. This full set of QH, BK, YX and TK series hydraulic brake components provides standardized parameter benchmarks for batch procurement, daily maintenance and equipment overhaul of oilfield hydraulic braking systems. It also serves as a professional technical reference for on-site personnel to diagnose hydraulic pressure failure, cylinder jamming, sealing leakage and other common faults, guiding standardized disassembly, assembly and maintenance operations. With reliable performance verified by long-term field application in multiple major oilfields, these supporting components deliver outstanding environmental adaptability and long-cycle operational stability. Users can select accurate matching parts according to actual equipment models, operating loads and fault conditions to complete refined equipment maintenance, stabilize hydraulic system operating performance and reduce overall equipment failure risks.