The valves commonly used in heating systems are: globe valves, gate valves (or gate valves), butterfly valves, ball valves, check valves (check valves), safety valves, pressure reducing valves, pressure stabilizing valves, balancing valves, regulating valves and a variety of self-operated regulating valves and electric regulating valves.
Globe valve: used to cut off the flow of the medium, there is a certain throttling performance, pressure loss, heating system is commonly used to cut off the flow of steam, in the valve type with “J” gates: used to cut off the flow of the medium, when the valve is fully open, the medium can be like through the general pipe, through, without changing the direction of flow, so the pressure loss is small. Therefore, the pressure loss is small. Gate valve regulation performance is very poor, in the valve model with “Z” said gate valve.
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Check valve: also known as check valve or check valve, which allows the medium to flow in one direction, if the pressure after the valve is higher than the pressure before the valve, the check valve will automatically close. There are various types of check valves, mainly including: lift type, swing type, etc. Lifting type of valve body outside the image of the shut-off valve, pressure loss, so in the new heat exchange station system is less used. In the valve model with “H” said.
Butterfly valve: It relies on changing the angle of the valve flap to achieve adjustment and switching. Since the valve flap is always in the middle of the flowing medium, the resistance formed is larger, so it is also less used. In the valve type with “D” said.
Safety valve: mainly used for pressure relief when the medium is overpressure, in order to protect the equipment and system. In some cases, the micro-opening water pressure safety valve can be used as a system pressure valve after improvement. There are many structural forms of safety valves, which are indicated by “Y” in the valve model number.