Industrial valves

1. Impurities are stuck on the sealing surface, and debris is deposited at the lower part of the valve or between disc and seat; Treatment: when this happens, do not close it by force.  People can try to open and close for several times. Usually, the problem will be resolved after several trying. The medium shall be kept with impurities as little as possible.    2. Valve stem threads are rusted and valve cannot be rotated; Treatment: for valves that are normally open, when it is accidentally closed, the valve stem threads are already rusted, and the valve may not close tightly. In this case, the valve shall be repeatedly opened and closed, and the bottom of valve body can be struck with a small hammer, then the valve will be closed, and grinding and repair are not required. 3. Valve sealing surface is destroyed, which causes the leaking; Treatment: if the valve is still not closed completely after several opening and closing, then it is for the reason that the...

 Today is an  “amazing" day. In the morning，we got bad news that  USD dollars are weakened again， the biggest decline in the past few months . But in the afternoon I got good news: our old customer release the control valve  order to us. So if you hold on to it，it will come to you finally.

Appearance. 1. If you see a ball valve with a down trunnion, it must be trunnion mounted ball valve, because floating ball valve don’t have. 2. When a ball valve has seat injection fitting, there’s no doubt it’s a trunnion ball valve. But you can’t say it must be a floating ball valve, because very small size trunnion ball valve also doesn’t have seat injection fitting, such as 2″ 150LB. Working Principles. 1. The ball of a floating ball is movable, it moves slightly after the medium give pressure to it, then the ball touched closely with the seat to seal. But in a trunnion mounted ball valve, the ball is fixed, don’t move. The medium pushes the seat move and closely touched with the ball, that’s the way of sealing. Design and Usage. 1. Trunnion mounted ball valve have a lower trunnion to fix the ball while floating ball valve don’t. 2. Floating ball valve is usually for small size up to 10″ and low pressure, while trunnion type reaches max 60″, pressure up to 2500L...

Cocentric butterfly valve is widely used in water treatment and other industries, because of its advantages: light weight, small size and easy installation, low cost. But due to its design, it’s limited in many cases. However, offset/eccentric butterfly valve could help. Below are some basic differences between cocentric butterfly valve and offset butterfly valve. Appearance.  You could easily distinguish them from the appearance, because of totally different design structure. Internal Difference.  1. Center line butterfly valve disc is simple, just a disc, but eccentric butterfly valve disc...