|   Tel: +86 150 0225 9955   |   Wechat: Bundor_marketing   |    Skype: +86 150 0225 9955

Home » News » Valve Knowledge

The difference and comparison of bellows globe valve and ordinary globe valve

Posted by Bundor valve
Bellows globe valve is also called bellows seal globe valve,a metal barrier is formed between the fluid medium and the atmosphere, ensure zero leakage of the stem.Compared with the ordinary globe valve has the following advantages:

1.Bellows globe valves have long service life, fewer maintenance times and lower operating costs. Robust bellows seal design ensures zero leakage of stem and provides conditions that do not require maintenance.
2.Valve's opening and closing torque is small, which reduces labor intensity, and can drive any form of drive device, easy to remote control.
3.Its appearance is beautiful, the valve channel has a smooth streamline, reduce the flow resistance coefficient of the valve, is a high quality energy-saving products.
4.The outer seal of valve adopts bellows seal and graphite, stainless steel gasket seal,its seal is reliable, long-term use can not replace the sealing packing.In industrial use, the globe valve caused leakage, high temperature, highly toxic, flammable and explosive, radiation media and so on,this not only pollute the environment, but also often cause significant personal and property losses.This kind of valve is safe and stable, and the design and manufacture strictly adopt foreign advanced standards.
The advantages and applications of bellows globe valves
1.Bellows globe valve has no leakage, so it is safe to use in high-risk medium.Ordinary globe valve use packing to seal, the stem and packing will slide, it is easy to leak at low temperature (spool).
2.Bellows globe valves use closed bellows that can be stretched and compressed instead of packing seals,it can effectively prevent the leakage caused by packing loss.It is generally used in permeable medium transport,and the general globe valve with packing to seal will be prone to leakage.
3.The opening or closing stroke of the stem of this valve is relatively short,and has a very reliable cut off function,due to the change of the valve port of the seat is  directly proportional to the stroke of the valve disc,it is very suitable for flow regulation.Therefore,this type of valve is very suitable for cutting, regulating, and throttling.