https://www.derkia.com/product-category/medical-gas-regulator/The selection of threads for medical decompression gas cylinders in the African market mainly adopts international standards, including the following types:
Main thread standards
1. Conical thread standard
PZ39: nominal diameter 39mm, pitch 2.117mm, 12 teeth per 25.4mm, is the most commonly used interface specification for medical and industrial gas cylinders
PZ27.8: nominal diameter 27.8mm, pitch 1.814mm, 14 teeth per 25.4mm, suitable for small and medium-sized gas cylinders
PZ19.2: nominal diameter 19.2mm, suitable for small gas cylinders and special applications
2. Parallel thread standard
According to the ISO 15245-1:2021 standard, the African market also adopts the following parallel thread specifications:
M30 x 2: nominal diameter 30mm, pitch 2mm
M25 x 2: nominal diameter 25mm, pitch 2mm
M18 x 1.5: nominal diameter 18mm, pitch 1.5mm
3. Low voltage connector standards
For the terminal connection of medical gas systems, the African market generally adopts the DISS (Diameter Index Safety System) interface, with a nominal diameter of 6.35mm, a conical sealing angle of 60 °, and a maximum working pressure of 1.0MPa.
Selection suggestion
When choosing medical decompression gas cylinders in the African market, attention should be paid to:
Confirm the interface code indicated on the gas cylinder label, and prioritize selecting specifications with strong universality such as PZ39 or M30 x 2
Check thread tolerance and sealing material to ensure compatibility with gas medium characteristics
Verify the working pressure of the gas cylinder, usually 15MPa or 20MPa, and the high pressure design can reach 30-45MPa
Considering the adaptability of the local climate, interface materials that are dust-proof, moisture-proof, and heat-resistant should be selected for high temperature and high humidity environments in Africa
It is recommended to consult local suppliers or check the shoulder stamp information of the gas cylinder before selecting, to ensure that the interface specifications are fully matched with the pressure regulator or equipment used.