Purpose:
This product is a gas cylinder pressure reducing device that can adjust the high-pressure gas inside the cylinder to a practical pressure for use. It is mainly used in welding, cutting, chemical, pharmaceutical and health, electronic industries, and other fields. This product can ensure stable output pressure regardless of changes in input pressure and output flow rate.
Ammonia pressure reducers are generally pressure reducing devices for bottled gases. Ensure that the outlet pressure remains stable when there are changes in the inlet pressure and outlet flow rate. An increase in the reading of the low pressure gauge may indicate potential dangers and hazards. Do the operators know the working range of the machine. Have you carefully read the instruction manual. Whether it violates the operating rules. Whether the purchased product is qualified. Is there a technical support hotline on the instruction manual. If the working environment temperature is very low, it is necessary to check whether the valve has frozen or blocked.
The function and classification of ammonia pressure reducers:
Due to the high pressure inside the gas cylinder, while the pressure required for gas welding, gas cutting, and usage points is relatively low, it is necessary to use a pressure reducer to reduce the high pressure gas stored in the gas cylinder to low-pressure gas, and ensure that the required working pressure remains stable from beginning to end. In short, a pressure reducer is a regulating device that reduces high-pressure gas to low-pressure gas and maintains stable output gas pressure and flow rate.
Ammonia pressure reducers can be divided into centralized and post type according to their different uses; According to different constructions, it can be divided into single-stage and two-stage types; According to different working principles, it can be divided into two types: positive action type and negative action type. At present, the common types of domestically produced pressure reducers are single-stage reaction type and two-stage hybrid type (the first stage is positive action type and the second stage is reaction type).
Construction and working principle of ammonia pressure reducer:
The body of the ammonia pressure reducer is made of brass. The structure of the two-stage pressure reducing system is basically similar, consisting of components such as the valve top rod, pressure regulating spring, elastic film device, and pressure reducing valve. The first stage pressure reduction system is mainly used to automatically reduce high-pressure gas to medium pressure gas, reduce the pressure to the required pressure, and then send it to the second stage pressure reduction system. In the secondary pressure reducing system, when the pressure regulating screw is tightened, the pressure reducing valve is opened and closed to varying degrees through the pressure regulating spring, elastic film device, and valve top rod, in order to adjust the pressure reduction degree of the oxygen supplied by the first pressure reducing system or stop the gas supply.
Safe use of ammonia pressure reducer:
(1) The action of releasing gas from the oxygen cylinder or opening the pressure reducer must be slow. If the valve opening speed is too fast, the temperature of the gas in the working part of the pressure reducer will greatly increase due to adiabatic compression, which may cause organic materials such as rubber packing and rubber film fiber pads to catch fire and burn out, and can completely burn out the pressure reducer. In addition, static sparks generated by rapid deflation and oil stains on the pressure regulator can also cause ignition, burning, and damage to the pressure regulator components.
(2) Precautions before installing the pressure regulator and when opening the gas cylinder valve: Before installing the pressure regulator, slightly open the oxygen cylinder valve to blow away dirt to prevent dust and moisture from entering the pressure regulator. When opening the gas cylinder valve, the outlet of the valve should not be aimed at the operator or others to prevent high-pressure gas from suddenly rushing out and injuring people. The joint between the outlet of the pressure reducer and the gas rubber pipe must be tightened with a wire or clamp that has been overheated; Prevent the risk of detachment after air supply.
(3) Precautions for loading, unloading, and operation of pressure reducers: When loading and unloading pressure reducers, attention must be paid to preventing the thread of the pipe joint from slipping, in order to avoid improper rotation and injection. During the work process, it is necessary to pay attention to observing the pressure value on the work pressure gauge. When stopping work, first loosen the pressure regulating screw of the pressure reducer, then close the oxygen cylinder valve, and slowly exhaust the gas inside the pressure reducer. This can protect the spring and pressure reducing valve from damage. After the work is completed, the pressure regulator should be removed from the gas cylinder and stored properly.
(4) The pressure regulator must be regularly calibrated, and the pressure gauge must be inspected regularly. This is done to ensure the reliability of pressure regulation and the accuracy of pressure gauge readings. If any air leakage or malfunction of the pressure gauge needle is found during use, it should be repaired in a timely manner.
(5) Handling of pressure regulator freezing. If the pressure regulator freezes during use, use hot water or steam to thaw it, and never use flames or red iron to bake it. After the pressure regulator is heated, any residual moisture must be blown off.
(6) The pressure regulator must be kept clean. The pressure reducer must not be contaminated with grease or dirt. If there is grease, it must be wiped clean before use
(7) Pressure reducers and gauges for various gases must not be interchanged, such as pressure reducers for oxygen, which cannot be used in systems such as acetylene and petroleum gas
Detailed parameters:

model	YQA-401	YQA-441
Input pressure	3MPa	3MPa
adjustment range	0.01~0.06MPa	0.01~0.4MPa
Nominal flow rate	0.4m3/h	15m3/h
Overall dimensions	70×155×125 ㎜	70×155×125 ㎜
Weight	1.3kg	1.3kg
Imported connection thread	G1/2″	G1/2″
Export connection thread	M16x1.5	M16x1.5