WS-TPtype Open and closed cell ratio tester_Pipe type_Product_Chengde City Wan plastic testing instrument Co., LTD

WS-TPtype Open and closed cell ratio tester

Product Introduction
The WS-TP type open/close porosity analyzer uses all stainless steel metal pipelines. It is a fully automatic analytical instrument that uses the gas expansion method to detect the open/close porosity, cut corrected open porosity, and cut corrected closed porosity of foamed materials, hard foam, core, metal and other materials. The instrument is mainly used in industries such as thermal insulation materials, sound insulation materials, metal materials, oil exploration, and can test polyurethane foam, phenolic foam, core, metal blocks, soil blocks and other substances.
2、 Working principle
Using Archimedes principle - gas expansion displacement method, small molecule inert gas (He or N2) is used as the medium. The volume of gas discharged by the sample in the test chamber is calculated using the ideal gas state equation: PV=nRT. The skeleton volume of the sample (including closed pores) is accurately measured, and the true density value is calculated based on the density equation: ρ=M/V.
The gas expansion displacement method is to replace liquid with gas to determine the volume of the sample being displaced. This method can avoid testing errors caused by sample dissolution in the immersion method and has the advantage of not damaging the sample. Because gas can penetrate the extremely small pores and irregular pores on the surface of the sample, the measured sample volume is closer to the true volume of the sample, which can be used to calculate the density of the sample, and the test value is also closer to the true density of the sample.
3、 Performance parameters

major function	The open and closed porosity and porosity (for bulk materials such as foam materials, rock cores, metal components, etc.) shall comply with GB/T 10799-2008, ASTM D6226-2005，ISO4590-2016； True density (for various non volatile and non corrosive non closed cell materials, such as metals, liquids, etc.); Real volume (various non volatile and non corrosive solids and liquids, including closed pores); Porosity (the porosity of a material can be calculated based on its true density and apparent density)
Testing accuracy	Accuracy error ≤ ± 0.02%, repeatability error ≤ 0.02%, division value: 0.0001%; (The test results of standard samples shall prevail, and the testing accuracy of other materials shall refer to national standards)
Pressure range	0KPa to 100KPa. Users can freely set the pressure value to reduce the error caused by the deformation of the analyzed sample due to pressure;
Pressure accuracy	High precision imported silicon thin film capacitive pressure sensor, with an accuracy of 0.1% of the actual reading, better than 0.1% of the full range;
Test speed	Complete the entire testing process within 2-3 minutes;
Test scope	The sample density is not limited. It can measure the true density of solid samples in powder, granular, block, foam and other forms, as well as slurry, nonvolatile liquid and other samples; The opening and closing porosity of foaming materials, metal materials, and other substances;
Test volume	0.01ml or more, suitable for various volume samples;
Sample tube	Standard 27 * 27 * 51mm sample tube (made according to the requirements of national standard GB/T10799-2008); Suitable for testing rectangular samples with dimensions of 25 * 25 * 50mm made according to standards, it can effectively utilize the sample pool space and reduce measurement errors caused by low space utilization. According to user needs, different specifications of sample tubes can be provided, such as specialized sample tubes for rock cores with a diameter of 25mm.
Test gas	40 liters of pure helium, with a purity of ≥ 99.999%; Nitrogen and other gases are optional;
Core accessories	Original imported valves and silicon film pressure sensors;
Operation method	Dual control system, can be connected to a computer for use, or can be used alone. Users can switch freely according to their needs;
Instrument size	Length: 350mm; Width: 350mm, height: 460mm; Net weight: 22kg

4、 Product features
Dual control system, which can connect to a computer through a serial port and operate the instrument through computer software; The instrument itself is equipped with a microcomputer touch screen control system, and can also be operated through the touch screen. Both operation modes are fully automatic and do not require manual monitoring. Test results are automatically generated and saved. The dual control system can provide users with more convenient operating methods, and users can switch operating methods as needed at any time. Both systems have full voice prompts;
The sample tube directly serves as the testing chamber, which can effectively utilize the volume of the testing chamber and significantly improve testing accuracy. Sample tubes of different volumes can simultaneously meet the requirements of micro volume and large volume loading, in order to achieve the goal of improving testing accuracy;
Sample tube automatic installation, a unique sample tube automatic installation device, simply place the sample tube in the designated position, and the instrument will automatically install the sample tube to the connection port. After the test is completed, the sample tube will be automatically disassembled, making the operation more convenient and avoiding testing errors caused by manual installation of the sample tube.
Using original imported pneumatic valves instead of traditional solenoid valves, there is no heating problem, eliminating the impact of solenoid valve heating on testing accuracy;
Integrated containerized pipeline, with no pipeline joints between valves, reducing air leakage points and achieving uniform temperature field;
Automatically perform sealing checks on the pneumatic system, automatically determine whether there is any leakage in the reference chamber and sample tube, ensuring the accuracy of the test results;
Through the control unit of the operation interface, the actions of various hardware of the instrument can be controlled, which helps
Enable operators to understand the working principle of the instrument and promptly identify the fault point when the instrument malfunctions, facilitating subsequent inspection and maintenance.
After the test is completed, the system automatically returns to normal pressure to prevent sample splashing during disassembly and assembly of the sample tube;
5、 Product advantages
National standard: Test of volume percentage of open and closed cells of rigid foam plastics GBT 10799-2008 has the following requirements for sample size:
1. Two regular cylinders with a cross-sectional size of 6.25cm2 and a height of 2.5cm (optional sizes);
2. Two regular cubes with dimensions of 2.5cm * 2.5cm * 2.5cm (recommended size according to national standards);
Regarding the selection of two sizes

	Regular cylinders are extremely difficult to cut unless specialized cutting tools are used, and measuring the appearance volume is inconvenient;
	Regular cubes are relatively easy to cut, and regular cutting tools are sufficient. Measuring the appearance volume is simple;

Regarding the selection of sample pools

Ordinary sample pool

The cylindrical sample pool is suitable for cylindrical samples. When using cubic samples, there is a large space, and the volume utilization rate of the sample pool is less than 50%, which has a significant impact on the testing of the open and closed porosity; Glass sample cells are prone to damage and are not durable.

Wansu sample pool

The rectangular sample cell is suitable for cubic samples, and the volume utilization rate of the sample cell exceeds 80%, which is more conducive to testing the opening and closing porosity. The stainless steel metal sample pool is durable and long-lasting.

6、 Sample tube installation method

　Wansu Instrument

Using the test chamber directly as the sample tube
There are few gaps, which can effectively utilize the testing chamber space and is more conducive to foam materials with high porosity.

　Other instruments

The sample pool needs to be placed in the testing chamber for testing

There are many gaps, and standard materials such as aluminum blocks and steel balls need to be used to fill the gaps. The utilization rate of the testing chamber space can only reach 50%, which is not suitable for testing foam materials with high porosity.

7、 List

Number	Component Name	quantity
1	WS-TP type open and closed porosity tester	one
2	USB flash drive (8G)	one
3	Standard samples	one
4	Special sample tube for opening and closing porosity	one
5	Sample tube joint sealing ring Ø 50 * 2.5	two
6	PU air duct (4mm * 10m)	one
7	Serial port cable（1.5m）	one
8	Power cord	one
9	1A Insurance tube	two
10	Sample tube brush	one
11	Gloves for hot wire isolation	one
12	Dust removal gas blowing	one
13	Tool kit (wrench, screwdriver)	one
14	Pressure reducing valve (including pressure gauge)	one
The following accessories need to be purchased locally by the user
*1	Sample cutting special table saw	one
*2	computer	one

Note: 1. The "*" mark is for optional accessories, and all quotations do not include optional accessories. Users need to purchase them themselves or separately.