screwjacks

  General Requirements 1. The industrial valve should be located in a place that is easy to operate, install, and maintain. The valves on rows of pipelines (such as those entering and exiting the device) should be centrally arranged to facilitate the installation of operating platforms and ladders. 2. Some valve positions have process operation requirements and locking requirements, and should be arranged and marked according to the PID instructions. 3. Valves on the bottom pipelines of equipment such as towers, reactors, and vertical vessels should not be arranged within the cluster. 4. Manual ball valves that need to be operated according to the instructions of the local instrument should be located close to the local instrument. 5. The regulating valve and safety valve should be arranged on the ground or platform in a place convenient for maintenance and debugging. 6. Fire hydrants or valves for fire protection should be located in a location that can be safely accessed in the ev

The sealing damage of the steam trap valve is the main cause of internal leakage of the valve. There are many reasons for valve sealing failure, among which the failure of the sealing pair composed of the valve core and valve seat is the main reason. There are many reasons that affect the damage of the valve sealing surface, including mechanical wear caused by incorrect selection, high-speed erosion, medium cavitation, various corrosion, blockage of impurities, improper selection of valve core and seat materials, deformation of the sealing pair caused by heat treatment process and water hammer, etc. 1. Electrochemical erosion. Due to factors such as mutual contact between sealing surfaces, contact between sealing surfaces and the sealing body and valve body, as well as differences in medium concentration and oxygen concentration, potential differences can occur, leading to electrochemical erosion and erosion of the sealing surface on the anode side. 2. Erosion and cavitation of the m

  What is the difference between ball screw jack and trapezoidal screw jack ? When to use ball screw jack , When to use trapezoidal screw jack ? Let’s look at the difference between ball screw  jack and trapezoidal screw jack with these questions, and explain it roughly from the following 7 aspects. 1. Different structures. The movement principle of trapezoidal screw  jack and ball screw  jack is the same, but the difference is that there is no ball in trapezoidal screw, so the movement between nut and screw shaft depends entirely on mechanical contact to produce sliding 2. Different transmission efficiency. The transmission efficiency of most ball screws is as high as 90%, and some even reach more than 95%, while the transmission efficiency of most trapezoidal screws is lower than 70%. trapezoidal screw is not suitable for high-speed operation, and its maximum speed is generally not more than 3000RPM. And the ball screw, because it is rolling friction, does not g

  Customized screw jack with a stroke length of 4360mm. Thanks to Philippine customers for providing us with real photos of on-site installation. More details on www.ludetransmission.com . Our company can customize long-stroke screw jack products. If necessary, welcome to consult. We will provide you with products with high quality and competitive price.

  The spool ball of the floating ball valve moves between the two seat sealing rings with the help of medium pressure, while the spool ball of the trunnion mounted ball valve is connected with the valve stem and rotates around the center of the valve stem, and the floating seat support ring. Floating Ball Valve The ball of the floating ball valve is floating. Under the action of medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure the seal of the outlet end. The floating ball valve is small in size, light in weight, simple in structure and good in sealing performance. The load of the working medium that the ball bears is all transmitted to the outlet sealing ring, so it is necessary to consider whether the material of the sealing ring can withstand the working load of the ball medium. This structure is widely used in medium and low pressure ball valves. Trunnion Mounted Ball Valve The ball of the trunnion m

The eccentric half ball valve has the advantages of rapid opening and closing, light weight, small flow resistance, wedge-shaped principle can be used to remove fouling when closing, and is convenient for air control and electric control, etc., and has been widely used in various industries. A new self-sealing structure of the sealing pair is designed for the application of the eccentric half ball valve under high temperature and high pressure conditions. Working Principle The center of rotation of the eccentric half ball valve body and the half ball body (that is, the axis of the valve stem) is offset by a radial dimension from the geometric center of the half ball sealing spherical surface, and also has an offset dimension from the sealing surface of the valve seat on the axis of the valve body channel. The eccentric half ball valve relies on two eccentrics to realize self-locking closure, and the reasonable selection of eccentrics makes the self-locking angle smaller than the fric