Jaw Crushers
Custom Explosion-Proof Sealed Jaw Crusher for Laboratory and Industrial Sample Preparation
Item Number: PP-JA12
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Product Overview
This sealed jaw crusher is a premium sample preparation solution engineered for efficient primary size reduction of medium-hard, hard, brittle, and tough materials. Representing a significant upgrade over standard models, it features enhanced sealing, integrated dust extraction, and a full safety enclosure that together create an exceptionally clean and safe operating environment. The optional custom explosion-proof cabinet further extends its capabilities into hazardous atmospheres, making it an ideal choice for laboratories and pilot plants where combustible materials are processed regularly.
Widely utilized across mining, metallurgy, geology, ceramic, chemical, and building material industries, this system excels at crushing raw samples—such as ores, minerals, rocks, slags, and additives—to controlled output sizes between 3 and 25 millimeters. The adjustable jaw gap allows users to fine-tune the output to meet specific analytical requirements, whether for XRF, ICP, fusion bead preparation, or further milling. Its robust performance and consistent crushing ratios ensure reproducible sample preparation, boosting workflow efficiency and analytical accuracy.
Built on a rugged platform with heavy-duty components, this crusher delivers long-term reliability even under continuous operation. Advanced motor protection features—including overload, overheat, and overcurrent safeguards—protect the drive system from damage, while the high-manganese steel jaws offer exceptional wear resistance. Together, these design elements translate to minimal maintenance, extended service intervals, and a low total cost of ownership, reinforcing your investment in quality sample preparation.
Key Features
- Explosion-Proof Cabinet Customization: The crusher can be fitted with a bespoke explosion-proof enclosure manufactured to global safety standards (IECEx or ATEX equivalent). This heavy-gauge steel cabinet fully contains internal sparks or deflagration, allowing safe processing of flammable or explosive samples such as coal, sulfur, or organic powders. Cabinet dimensions, monitoring windows, and access hatches are tailored to your workflow.
- Advanced Sealing and Dust Extraction: A multi-stage labyrinth seal minimizes dust leakage, while a dedicated extraction port with a standard flange actively removes fine particles. This system can be connected to an existing central vacuum network or paired with an independent filter unit, maintaining a virtually dust-free workspace and protecting operators from respirable hazards.
- Full Protective Enclosure: Moving parts and pinch points are completely enclosed by a robust, aesthetically designed cover. This upgrade from semi-closed designs greatly reduces the risk of accidental injury and makes the crusher compliant with stricter occupational safety regulations, while also minimizing noise emissions.
- Intuitive Operator Controls: Start and stop push-buttons are ergonomically positioned for immediate access. An integrated control panel may include overload, temperature, and current indicators, giving operators real-time feedback on machine status. This design facilitates quick shutdown in emergencies and simplifies daily operation checks.
- Comprehensive Motor Protection: Built-in thermal, overload, and overcurrent relays automatically shut down the motor if dangerous conditions arise, preventing burnout and costly repairs. This protection enables the crusher to handle frequent load fluctuations and tough feed materials without compromising motor lifespan.
- Versatile Crushing Output: By adjusting the discharge gap, users can easily vary the output particle size from as coarse as 25 mm down to 3 mm, accommodating a wide range of downstream processing needs—from direct analysis to secondary grinding.
- Long-Life Crushing Components: The stationary and movable jaws are cast from wear-resistant high-manganese steel, which work-hardens under impact to extend service intervals. Optional chromium alloy jaws are available for highly abrasive materials, ensuring maximum durability in harsh crushing environments.
- Easy Maintenance Access: The enclosure is designed with quick-release locks and hinges, providing convenient access to the crushing chamber for jaw replacement and thorough cleaning. Minimal downtime translates to higher lab throughput.
Applications
| Application | Description | Key Benefit |
|---|---|---|
| Mining Core and Chip Sample Preparation | Primary crushing of drill core segments and RC chips for geochemical and mineralogical assay. The sealed chamber prevents loss of fine fractions and cross-contamination between samples. | Delivers representative, high-quality samples that improve assay accuracy. |
| Metallurgical Quality Control | Crushing ferroalloys, slag, and smelter products for XRF and wet chemical analysis. Adjustable output ensures particle sizes meet the requirements of pulverizing mills. | Consistent output and robust construction reduce wear costs over thousands of samples. |
| Geological Survey Camp Crushing | Field-deployable unit for reducing rock, mineral, and sediment samples in remote camps. The integrated dust extraction and full enclosure meet environmental and occupational health guidelines. | Compact footprint and safe operation in makeshift field setups. |
| Building Material R&D and QC | Preparation of clinker, gypsum, cement, and aggregate materials for compression testing, chemical modulus checks, and fineness analysis. The explosion-proof option allows safe crushing of coal-fueled cement raw meal. | Covers a wide range of materials with one reliable system. |
| Ceramic Raw Material Processing | Size reduction of feldspar, quartz, clay, and recycled ceramic grog prior to ball milling. The sealed environment minimizes silica dust release, crucial for worker health. | Eliminates cross-contamination and maintains raw material purity. |
| Chemical and Fertilizer Sample Prep | Crushing phosphate rock, potash, sulfur prills, and compound fertilizers for nutrient analysis. The explosion-proof cabinet is essential when handling sulfur and ammonium nitrate mixtures. | Mitigates fire and explosion hazards, enabling routine testing of combustible materials. |
| Glass and Refractory Material Testing | Preparation of glass cullet, refractory bricks, and silica sand for batch analysis. The adjustable gap accommodates both coarse primary breakage and finer secondary crushing. | Delivers the precise particle size distribution needed for predictive process models. |
| Environmental and Waste Management | Reducing contaminated soil, concrete drillings, and industrial sludge pellets for leachability and compositional studies. The sealed design prevents emission of noxious dust. | Ensures compliance with health and safety protocols during hazardous sample handling. |
Technical Specifications
Note: The following parameters reflect the PP-JA12 (custom explosion-proof sealed jaw crusher) based on the upgraded EP-3B platform. All specifications are subject to final configuration of the explosion-proof cabinet and customer requirements.
| Specification Category | Parameter | Value |
|---|---|---|
| Crushing Chamber | Feed Opening (Width × Length) | 125 × 150 mm |
| Maximum Feed Particle Size | <100 mm | |
| Output Size Range (Adjustable via jaw gap) | 3 – 25 mm | |
| Performance | Production Capacity | 0.5 – 1.2 metric tons per hour |
| Typical Particle Reduction Ratio | 4:1 to 10:1 (depending on setting) | |
| Drive System | Motor Power | 3.0 kW |
| Motor Type | TEFC induction, 380V/50Hz (other voltages available) | |
| Motor Protections | Overload relay, thermal overload, overcurrent | |
| Sealing & Dust Control | Sealing Technology | Multi-stage labyrinth seal |
| Dust Extraction Port | Standard DN50 flange for external ventilation | |
| Seal Maintenance | Easy to clean, no regular seal replacement needed | |
| Safety & Enclosure | Safety Enclosure | Full closed steel cover with interlocked access |
| Explosion-Proof Cabinet | Optional custom design; specifications provided per order | |
| Explosion-Proof Certifications | Designed to meet IECEx/ATEX equivalent requirements (certification documentation provided on request) | |
| Emergency Stop | Push-button at operator panel (additional remote E-stops available) | |
| Construction | Jaw Material | High-manganese steel (Cr alloy optional) |
| Jaw Hardness | Work-hardens to approx. 52 HRC in service | |
| Main Frame | Welded heavy steel construction | |
| Paint Finish | Corrosion-resistant epoxy (custom colors available) | |
| Controls & Operation | Control Panel | Push-button start/stop, indicator lights for power and faults |
| Control Voltage | 24V DC for operator safety | |
| Dimensions & Weight | Overall Footprint (without cabinet) | Approx. 1200 × 800 × 1400 mm (L × W × H) |
| Net Weight (base unit) | Contact factory for weight data; typical ~600 kg | |
| Cabinet Dimensions | Customizable; add approximately 400-600 mm in width and depth | |
| Options & Accessories | Jaw Material Upgrade | Chromium alloy for highly abrasive feeds |
| Hopper Extension | Enlarged inlet hopper for mechanical feeding | |
| Output Chute | Customized to fit existing conveyor or collection bin | |
| Remote Monitoring | 4-20 mA current fault output; Modbus RTU available |
All specifications are subject to change based on custom engineering. Contact us for a detailed technical proposal tailored to your application.
Why Choose This Product
- Engineered for the Most Demanding Safety Requirements: In industries where dust explosivity is a concern, standard crushers are a liability. Our explosion-proof cabinet option, integrated with a full enclosure and advanced motor protections, creates a genuinely safe operating environment. This is not an aftermarket add-on but a purpose-designed solution that undergoes rigorous safety analysis to protect your staff and facility.
- Unmatched Dust Containment: The combination of a labyrinth seal and active dust extraction keeps your lab immaculate—even when crushing dry, fine-powdered materials. This reduces housekeeping time, protects sensitive analytical instruments from contamination, and fulfills OSHA and equivalent occupational exposure limits for respirable dusts.
- Customized to Your Process: No two labs are alike. We tailor the crusher exactly to your needs—explosion-proof rating, cabinet size, feed and discharge interfaces, motor voltage, control integration, and even jaw material combination. This bespoke approach ensures seamless integration into your existing sample preparation workflow without compromises.
- Proven Long-Term Reliability from an Upgraded Platform: Based on the EP-3B upgraded design, this unit inherits a legacy of robustness with modern enhancements. Heavy-duty bearings, precision machining, and industrial-grade components translate to years of trouble-free operation, even under continuous daily use. The low maintenance requirements and readily available spare parts make it a sound investment.
- Dedicated Pre- and Post-Sale Support: From initial feasibility discussions and on-site assessments to detailed CAD drawings, installation supervision, and aftermarket service, our team partners with you at every step. Whether you need a quick quote for a standard unit or an engineered solution for a classified area, we respond promptly with technical expertise.
For a custom configuration or to request a detailed quotation, contact our team today. Let us engineer a crushing solution that meets your precise safety, capacity, and operational requirements.
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