The pneumatic back pressure valve adjusts the back pressure by controlling the pressure of compressed air, thereby regulating the fluid pressure in front of the valve. The pressure can be adjusted continuously within the control range, enabling stepless and continuous back pressure regulation. It supports various control methods, including remote control and on-site pneumatic control. The back pressure in front of the valve is controlled by air pressure, and the output ratio of air pressure to back pressure can be adjusted by changing the diaphragm size. The current pneumatic control ratio ranges from 1:1 to 1:40. This valve is suitable for applications that require remote and precise fluid pressure control.
The air supply pressure for this pneumatic back pressure valve should not exceed 0.8 MPa.
This series of back pressure valves adopts a piston-sealed design, making it suitable for
stabilizing pressures of high-purity gases or liquids, toxic substances, or corrosive fluids.
This series of back pressure valves adopts a piston-sealed design, making it suitable for stabilizing pressures of high-purity gases or liquids,
toxic substances, or corrosive fluids.
I. Safety Warnings
1.Do not use the back pressure valve for gases or liquids other than those specified.
Certain gases or liquids may undergo complex chemical reactions when mixed, potentially damaging the valve and causing accidents.
2.Confirm product specifications and operating conditions.
It is essential to verify the working conditions of this product, as it contains high-pressure gas or liquid. Check the following items and ensure the valve specifications meet your requirements:
a. Type of gas or liquid used
b. Inlet pressure (primary pressure)
c. Connection type and size at the gas or liquid inlet
d. Connection type and size at the gas or liquid outlet
e. Gas or liquid flow rate
Important: If the valve specifications do not match your usage conditions, it may cause damage to the valve or lead to gas or liquid leakage.
3.Verify the working environment.
The valve should be installed in a well-ventilated location. Even if the gas or liquid is non-toxic and non-corrosive, it may cause oxygen deficiency, leading to personal accidents.
4.Prevent contamination from oil, grease, and other substances.
Water, oil, or dust entering the valve may damage the product, cause gas or liquid leakage, or impair the valve’s pressure regulation functionality.
⚠️ A filter with an accuracy of at least 20 µm must be installed in front of the back pressure valve when used with gases.
II. Connections
1.Use a wrench to securely connect the back pressure valve’s inlet and outlet fittings to the cylinder valve or high/low-pressure pipelines to prevent gas or liquid leakage. Do not rotate the valve body itself; hold the body firmly and tighten the nut to secure the connection.
2.Ensure that the inlet and outlet connections are secure during installation.
Any loosening of these connections may result in gas or liquid leakage, creating significant safety hazards.
⚠️ Do not open the packaging until installation to minimize potential internal contamination.
⚠️ Thoroughly clean the oil, water, and dust from the connection points between the gas cylinder, piping system, and the valve.
Any contaminants entering the valve may pollute the gas or liquid and block the flow channels.