Dolomite

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Dolomite

description

The stand is designed for PPE testing to determine their resistance to dust. Working substance is dolomite dust.
Dust from the atomizer is fed into a dust chamber for spraying into the airflow 60 m3/h.
The stand includes: dust chamber, dust generator, device for supplying humidified and preheated pulsating air flow, a constant flow feeder, the concentration of dust control device with built-in driving force flow.
The stand is equipped with modern means of automation. The stand is controlled by the operator via a personal computer.

Relevant standarts: EN 143, EN 149, EN 405, EN 1827, EN 12941, EN 12942, EN 13274-8, EN 14387

Presentation testing unit Dolomite

FIELDS OF APPLICATION

For the PPE developers

research and verification characteristics of the developed PPE, it’s parts and elements;
creation of extreme operating conditions of the PPE.

For the PPE manufacturer

tests of the PPE, it’s parts and elements on all stages of development by third-party organizations;
carrying out all types of production tests.

For laboratories and certification centers

certification testing;
monitoring the PPE quality;
testing for comparison of the different PPE characteristics.

Specifications

The stand includes: dust chamber, dust generator, device for supplying humidified and preheated pulsating air flow, a constant flow feeder, the concentration of dust control device with built-in driving force flow.

The stand is equipped with modern means of automation. The camera is controlled by the operator via a personal computer. Automation tools allow you to semi-automatically to maintain the parameters of the test (the speed of the airflow, dolomite dust content). The operator receives timely information on the current concentration of dust in the camera and is able to adjust. The result is stored in the database for a set of statistics and solving other applications.

Main technical parameters

Parameter	Value	Infelicity
The constant air flow through the dust chamber, m³/h	up to 70	1,5%
The linear air flow velocity, cm/s	to 5	1%
The content of dolomite dust, mg/m³	300 … 500	1%
Constant air flow transmitted through the test filter, dm³/min	до 100	1%
Air flow rate through the sampling probe, dm³/min	до 2,5	1%
Pulsating air flow transmitted through the filter: – Depth, dm³/min – Frequency, min^-1 – “Exhalation” humidity, % – “Exhalation” temperature, ⁰С	до 2.5 до 20 до 95 37	1% 0,1% ±2% ±10
Testing temperature, ⁰С	16 … 25	–
The resistance of the filter, kPa	– 4 … + 4	± 1,0 %

General characteristics

№ p\p	Parameter	Value
1	Dimensions, mm – height; – width; – width;	1820 810 7500
2	Weight	not more than 300 kg
3	Power supply	220 V 50 HZ
4	Power consumption	2 kW

ADVANTAGES

Ease of use

allows the operator to learn all of its functions and features. Completeness of technical and softwaresolutions of the stand allow to carry out work after start of tests in the automatic mode, according to the set program and with fixing of all necessary data.

Versatility

The stand is applicable for all the major types of PPE. Stand provides the ability to verify the requirements of all international standards.

Principle of operation

The test filter is installed in an adapter of the test chamber. As an adapter may extend the dummy’s head. During the test, the time to achieve a given breathing resistance of RPD on constant or pulsating air flow is determined. The stand provides two modes of operation – on a constant and pulsating air flow (figure 1 and figure 2). During the tests the Stand provides control of all parameters. Test parameters can be set according to customer demand in a range of technical capabilities of the stand.

Working substance: dust dolomite DRB 4/15.

Dust from the atomizer is fed into a dust chamber for spraying into the airflow 60m/h.

For constant air flow mode: testing device is fixed in the corresponding filter adapter and the filter passes the air stream with a flow rate of 95 dm³/min to achieve an appropriate ultimate resistance or a required testing time

Pulsating air flow mode (depth 2 dm3/min, frequency – 15 times per minute, 37⁰C temperature, 95% relative humidity). Tests carried out to achieve an appropriate ultimate resistance of RPD or a required testing time