The plunger valve is composed of the valve body, the valve cover, the valve stem, the plunger, the hole frame, the seal ring and the hand wheel, etc. When the hand wheel rotates, the valve rod drives the plunger to reciprocate up and down in the middle of the hole frame to complete the valve The opening and closing function. Closing valve opening and closing pieces of plug-shaped flap, the sealing surface was flat or tapered surface, the valve flap along the fluid center line for linear motion. Plunger valve closed by a stainless steel plunger, the upper and lower two flexible ring and a metal frame composition, the sealing effect by the plunger and seal closely to achieve, the plunger inserted in the two seals, the sealing area When the plunger valve is opened and closed, the plunger moves slowly in the seal ring with almost no wear on the contact surface. When the plunger is closed, the plunger is inserted into the lower seal ring to cut off the flow channel. When the plunger is opened, the plunger is detached from the lower seal Circle, but still hidden in the ring, keep isolated from the outside world, will not leak. Stop valves are forced to seal the valve, so the valve is closed, the pressure must be applied to the valve flap to force the sealing surface does not leak. When the medium from below the valve into the valve, the operating force needed to overcome the resistance is the valve stem and packing friction and the thrust generated by the media pressure, off the valve force than the valve open, so the valve stem The diameter should be larger, otherwise it will happen valve stem bend. Globe valve has the following advantages: simple structure, manufacturing and maintenance more convenient, small working stroke, opening and closing time is short. Good sealing, sealing surface friction, long life. The shortcomings of the globe valve are as follows: Large fluid resistance, greater force required for opening and closing. Not suitable for particles with a larger viscosity, easy to caking medium. Poor regulation performance. Advantages of the plunger valve Said above, it is the biggest drawback is slow opening and closing speed. Xiaobian summary: Through the above analysis, the difference between the plunger valve and the valve has been a greater understanding. Believe that with the aid of modern science and technology, these two kinds of products will certainly be more suitable for market demand, perhaps one day in the future, the boundaries of these differences will be smaller and smaller. Want to know the difference between the plunger valve and the cut-off valve related information, please pay attention to grab the chief information channel. ã€Print】 ã€Close】