What's the Difference Between Needle Valve and Globe Valve?
What's the Difference Between Needle Valve and Globe Valve?
Valve is used to open and close the pipeline, control the flow direction, adjust and control the parameters of the medium (temperature, pressure and flow) pipeline accessories. Valve is the control component of fluid transportation system, which has the functions of cut-off, regulation, diversion, prevention of countercurrent, pressure stabilization, shunt or overflow relief. The valves used in fluid control system, from the simplest stop valve to various valves used in extremely complex automatic control system, have many varieties and specifications.
Valves are generally found in any areas where liquids flow plus it incorporated into your house’s water system, particularly your tap. Water flows out while turning the taps, turn it back and water blocks flowing.
Globe valve
Globe valve, also known as shut-off valve, is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to prevent leakage of the forced sealing surface. When the medium enters the valve from below the valve disc, the resistance to be overcome by the operating force is the friction between the stem and packing and the thrust generated by the pressure of the medium. The force to close the valve is larger than that to open the valve, so the diameter of the stem should be larger, otherwise the stem will be bent. According to the connection mode, it can be divided into three types: flange connection, screw connection and welding connection.
The globe valve's opening and closing part is a plug-shaped disc. The sealing surface is flat or conical. The disc moves linearly along the center line of the valve seat. It can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.
Needle valve
The globe valve's opening and closing part is a plug-shaped disc. The sealing surface is flat or conical. The disc moves linearly along the center line of the valve seat. It can be used to control the flow of air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media.
Needle valve
A needle valve is a type of valve with a small port and a threaded, needle-shaped plunger. It allows precise regulation of flow, although it is generally only capable of relatively low flow rates.
An instrument needle valve uses a tapered pin to gradually open a space for fine control of flow. The flow can be controlled and regulated with the use of a spindle. A needle valve has a relatively small orifice with a long, tapered seat, and a needle-shaped plunger on the end of a screw, which exactly fits the seat.
Needle valve is a kind of globe valve.
An instrument needle valve uses a tapered pin to gradually open a space for fine control of flow. The flow can be controlled and regulated with the use of a spindle. A needle valve has a relatively small orifice with a long, tapered seat, and a needle-shaped plunger on the end of a screw, which exactly fits the seat.
Needle valve is a kind of globe valve.
