The flow rate and flow rate of the brass valve mainly depend on the bore size of the brass valve, and it is also related to the resistance of the brass valve to the medium by the structural type of the brass valve connect.
The flow channel area of the brass valve has a direct relationship with the flow rate and flow rate, and the flow rate and flow rate are two interdependent quantities. When the flow rate is constant, the flow rate is large, the flow channel area can be smaller; the flow rate is small, the flow channel area can be larger. Conversely, the larger the flow channel area, the smaller the flow rate; the smaller the flow channel area, the larger the flow rate.
What is bore size of brass valves
The bore size of the brass valve is the diameter of the valve port hole. Brass valves are control components in fluid conveying systems, with functions such as cut-off, regulation, diversion, backflow prevention, voltage stabilization, diversion or overflow pressure relief.
Determine the diameter of the brass valve according to the flow rate and flow rate. The flow rate and flow rate of the brass valve mainly depend on the diameter of the brass valve. The flow channel area of the brass valve is directly related to the flow rate and flow rate, and the flow rate and flow rate are Two quantities that depend on each other. When the flow rate is constant, the flow rate is large, and the flow channel area can be smaller; when the flow rate is small, the flow channel area can be larger. Conversely, the larger the flow channel area, the smaller the flow rate; the smaller the flow channel area, the larger the flow rate. The flow rate of the medium is large, the diameter of the brass valve can be smaller, but the resistance loss is large, and the brass valve is easily damaged. If the flow rate is too large, it will have electrostatic effect on flammable and explosive media, causing danger; if the flow rate is too small, the efficiency will be low and not economical. For viscous and explosive media, a lower flow rate should be used. For oil and liquid with high viscosity, choose the flow rate according to the viscosity, generally 0.1~2m/s. In general, the flow rate is known and the flow rate can be determined empirically. The common flow rates of various media are shown in the table. The nominal diameter of the brass valve can be calculated from the flow rate and flow.
Image: what is bore size of brass valves
The flow rate of the medium is large, the bore size of the brass valve can be smaller, but the resistance loss is large, and the brass valve is easily damaged. If the flow rate is large, it will have electrostatic effect on flammable and explosive media, causing danger; if the flow rate is too small, the efficiency will be low and not economical. For viscous and explosive media, a smaller flow rate should be used. The flow rate of oil and liquid with high viscosity should be selected according to the viscosity, generally 0.1 ~ 2m/s.
In general, the flow rate is known and the flow rate can be determined empirically. The nominal bore size of the brass valve can be calculated from the flow rate and flow.
Image: bore size types of brass valves
Brass valves have the same bore size, different structure types, and different fluid resistances. Under the same conditions, the greater the resistance coefficient of the brass valve, the more the flow rate and flow rate of the fluid passing through the brass valve drop; the smaller the resistance coefficient of the brass valve, the less the flow rate and flow rate of the fluid passing through the brass valve.
The common flow rates of various media are shown in the table below:
Remarks:
The resistance coefficient of the brass gate valve is small, only in the range of 0.1 to 1.5;
Brass gate valve with large diameter has a resistance coefficient of 0.2 to 0.5;
The shrinkage brass gate valve has a larger resistance coefficient.
The resistance coefficient of the brass globe valve is much larger than that of the brass gate valve, generally between 4 and 7. The Y-type brass globe valve (DC type) has the smallest resistance coefficient, which is between 1.5 and 2.
The resistance coefficient of the brass check valve depends on the structure: the swing check valve is usually about 0.8 to 2, and the resistance coefficient of the multi-lobed swing check valve is larger;
Brass lift check valve has the largest drag coefficient, up to 12.
The resistance coefficient of brass plug valves is small, usually about 0.4 to 1.2.
The resistance coefficient of the brass diaphragm valve is generally around 2.3.
The resistance coefficient of brass butterfly valve is small, generally within 0.5.
Brass ball valve has the smallest resistance coefficient, generally around 0.1.
The resistance coefficient of the above brass valve is the value when the brass valve is fully open.
The selection of the bore size of the brass valve should take into account the machining accuracy and dimensional deviation of the brass valve, as well as other factors. Brass valve bore size should have a certain reserve, generally 15%. In actual work, the bore size of the brass valve depends on the bore size of the process pipeline.
