Intelligent Self-Rescuer Airtightness Tester

Product Features

Airtightness inspection is one of the primary methods for checking self-rescuers. Current airtightness testers rely on manual pressurization, which places a high labor burden on inspectors and results in low efficiency. Additionally, manual pressure control makes it difficult to ensure inspection reliability. Due to the use of rubber for pressurization, the housing is bulky, with a weight exceeding 30kg. Our newly introduced automatic pressurization airtightness tester achieves digital pressure setting, automatically stops when the set pressure is reached, and displays the countdown to the required test duration. It is accurate and reliable, with a total weight of no more than 25kg.

This instrument features an aesthetically pleasing appearance, intuitive digital display, high precision, minimal error, sturdiness, reliability, compact structure, and ease of use. It offers excellent stability and a long calibration cycle; generally, no adjustments are needed after calibration, as it remains stable within the error margin.

Main Applications and Scope of Use

The tester can be used for airtightness inspections of filtering, chemical oxygen, and compressed oxygen self-rescuers.

Implementation Standard

MT709-1997 Coal Mine Filtering Self-Rescuer for Carbon Monoxide (Qualified when pressure reaches 13.34kPa and remains for 15s, with pressure drop less than 98Pa)

Operating Environmental Conditions

Well-ventilated and dust-free indoor environment

Humidity < 90% RH

Temperature: (0–40)°C

Safety

a) Ensure good indoor ventilation during use of this device;

b) The indoor area should have effective anti-static measures;

c) There should be no sources of ignition indoors.

Principle and Structure

The pressurization pump increases pressure, transmitting compressed gas to the air chamber. The sensor in the air chamber sends signals to the digital pressure display. When the chamber pressure reaches the set value on the pressure gauge, the pressurization pump stops, allowing inspection of the product under test. The instrument mainly consists of a casing, air chamber, pressure regulator, pressurization pump body, sealing device, etc.

Main Technical Parameters

a. Measurement range: 12.000–20.000kPa (adjustable in segments); factory setting is 15.000kPa

b. Pressure accuracy: ±1Pa;

c. Inspection time: 30s

d. Automatic inspection timing: 15s;

e. Time accuracy: 0.01s;

f. Maximum number of rapid inspections at once: up to 8 filtering types

g. Operating voltage: AC220V