Laboratory centralized gas supply system

The laboratory gas supply system can be divided into dispersed gas supply and centralized gas supply according to its supply method.

(1) Distributed gas supply refers to placing gas cylinders or gas generators separately in various instrument analysis rooms, close to the gas consumption points of the instruments, which is convenient to use, saves gas consumption, and requires less investment; However, due to the proximity of the gas cylinder to the experimental personnel, the safety is poor, and it is generally required to use explosion-proof gas cylinder cabinets with alarm and exhaust functions. Alarm devices are divided into combustible gas alarm devices and non combustible gas alarm devices. The gas cylinder cabinet should be equipped with gas cylinder safety warning signs and gas cylinder safety fixing devices.
(2) Centralized gas supply is the process of placing all types of gas cylinders required for various experimental and analytical instruments in separate cylinder rooms outside the laboratory for centralized management. Various gases are transported through pipelines from the cylinder rooms to different experimental instruments in each laboratory according to their gas requirements. The entire system includes a gas source collection pressure control part (manifold), a gas transmission pipeline part (EP grade stainless steel pipe), a secondary pressure regulation and diversion part (functional column), and a terminal part (joint, globe valve) connected to the instrument. The entire system requires good airtightness, high cleanliness, durability, and safety reliability, which can meet the requirements of uninterrupted and continuous use of various gases by experimental instruments. During use, the overall or local gas pressure and flow rate can be fully adjusted according to the working conditions of the experimental instrument to meet the requirements of different experimental conditions.
Centralized gas supply can achieve centralized management of gas sources, away from laboratories, and ensure the safety of experimental personnel; However, the long gas supply pipeline leads to gas waste, and opening or closing the gas source requires going to the gas cylinder room, which is inconvenient to use.