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JAW-600A Manhole Cover Press
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- Product Description
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The JAW-1000A microcomputer-controlled electro-hydraulic servo manhole cover pressure testing machine is used to evaluate the load-bearing capacity of manhole covers made from various materials, including residual deformation and test load. It supports closed-loop control modes such as constant-rate loading and constant-rate deformation, and can automatically calculate the specimen’s technical parameters.
This testing machine and its accessories comply with the following standard requirements:GB/T 23858-2009 “Manhole Covers”
GB/T 26537-2011 “Manhole Covers for Steel Fiber Reinforced Concrete”
CJ/T 211-2005 “Manhole Covers Made of Polymer Matrix Composites”
CJ/T 121—2000 “Manhole Covers Made of Recycled Resin Composites”
CJ/T 3012 “Cast Iron Manhole Covers”
CJ/T 511-2017 “Cast Iron Manhole Covers”
GB/T 2611 “General Technical Requirements for Testing Machines” and GB/T 16826 “Electro-Hydraulic Servo Testing Machines”
Technical Specifications
Parameter Specifications Test force 1000KN Accuracy class Level 1 Relative error of the indicated value ±1% Effective measurement range 1%–100% FS, no range divisions across the entire span Relative error of the deformation indication value ±1% Deformation measurement resolution 0.001mm Compressed interfacial spacing 300mm Effective distance between the two columns 1200mm Piston stroke 300mm Piston travel speed 80mm/min Upper platen dimensions Φ300mm Lower platen dimensions Φ356mm Host external dimensions 1420×1250×2000mm Oil source cabinet dimensions 800×600×1600mm Total machine power 1.8 kW (oil pump motor 1.5 kW) Oil source cabinet weight 300kg Overall machine weight Approximately 3,000 kg
Reasons to Choose Us
Multiple specifications to choose from
Source factory
Ships promptly
Thoughtful service
Supports customization
Selected Raw Materials
Factory Advantages
Deep expertise, comprehensive product range
√Over 10 years of dedicated R&D and manufacturing of testing instruments for highway, construction, geotechnical, asphalt, cement, and other engineering applications.
√Comprehensive category coverage: from raw material testing to construction quality control, a one-stop solution.
√Compliant with international standards such as ISO and GB, meeting the regulatory requirements of overseas projects.
Reliable quality and excellent value for money.
√ We strictly adhere to the ISO 9001 quality management system, select core components from internationally renowned brands, and conduct full inspection before shipment.
√ In-house manufacturing + a large-scale supply chain deliver strong price competitiveness, with no markups from intermediaries.
√Stable and durable, with a low failure rate, reducing operational and maintenance costs for overseas customers.
Efficient delivery, global service
√In-stock inventory plus flexible manufacturing ensures 7–15 day rapid delivery, with support for customized rush orders.
√Cangzhou’s Lin’gang District boasts a strategic location, with convenient sea and air transportation and globally traceable logistics.
√Multilingual team with 24-hour technical support, offering installation and commissioning, training, a three‑year warranty, and ongoing follow-up services.
Operating with integrity and backed by extensive experience.
√13 years of industry expertise, serving over 30 countries and regions worldwide.
√The principle of “integrity in business, mutual benefit.”
√Deep understanding of international engineering standards and procurement processes, with efficient communication and seamless collaboration.
Frequently Asked Questions
Is the universal materials testing machine experiencing loading stalling or abnormal zeroing of load data?
1. Loading lag: Clean the lead screw and guide rails, apply lubricant, and remove debris from the transmission components. 2. Zeroing anomaly: Restart the equipment system, calibrate the load and displacement zero points, and check for poor electrical contact in the sensor wiring. 3. Overloading is strictly prohibited; before testing, verify that the grips are securely tightened to prevent eccentric loading of the specimen.
How often should in‑instrument verification be performed? Which instruments are required to undergo it?
High‑precision, high‑frequency‑use, and drift‑prone equipment (such as balances, penetration testers, water permeability testers, and sensor‑type devices) shall undergo intermediate verification every three months; routine equipment shall be verified every six months. Equipment that is within the verification/calibration interval, has been repaired following a malfunction, or has been relocated must undergo additional intermediate verification, with complete verification records maintained.
Is the repeatability of pendulum-type pavement friction coefficient measurements poor?
Key points for resolution: Prior to testing, thoroughly clean the pavement at each measurement point, ensuring there is no standing water, dust, or debris; calibrate the instrument’s level and zero point to ensure a standardized pendulum‑drop trajectory; strictly control the pendulum’s sliding distance; avoid conditions such as strong winds, wet pavement, or abrupt temperature changes; and calculate the average of multiple measurements taken at the same point.
How should one handle cases where the pavement infiltration meter data exceeds allowable error limits, exhibits leakage, or shows abnormal readings?
1. Sealing leaks: Inspect the base seal for aging or damage and replace it promptly; before testing, firmly press down on the base to expel any residual air inside. 2. Data deviation > ±2%: Calibrate the level sensor, clean any fouling from the graduated cylinder, and check for damage to the scale markings. 3. Compliance with new regulations: For seepage rates ≤ 300 mL/min, existing equipment may continue to be used; for rates > 300 mL/min, the accuracy of older equipment fails to meet standards, and such equipment must not be used.
Can the old Marshall compaction apparatus and stability tester still be used?
According to the 2025 revised asphalt testing procedures, after adjusting the indenter configuration on the Marshall stability test apparatus, existing instruments currently in use may continue to be operated normally without mandatory replacement; only periodic calibration to maintain accuracy and ensure equipment integrity is required.
What are the causes of uneven compaction and layered cracking in molded specimens during compaction testing?
Main causes: non‑vertical drop of the compaction hammer, rail jamming, excessive deviation in hammer weight, uneven layer thickness during loading, insufficient number of blows, or overload. Solutions: regularly lubricate the guide rails; verify and correct the vertical alignment of the hammer; strictly follow the procedure for layered material placement and step‑by‑step compaction; ensure that hammer weight and drop height comply with standards; and prevent over‑thick layers.
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