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Marine Valves Marine Valve, one of the most popular valves, is wildly used in many industries. Because the friction between the sealing surface is small, and very durable, and it has a small opening height, and manufacturing process is easy, convenient maintenance, it is not only suitable for low voltage, but also to be applied to high pressure circumstances, that leads to its wide use in industries The principle of the Marine valve closing is the pressure of the valve bar used to close the sealing surface of the disc and the sealing surface of the seat to prevent the circulation of the media. Marine valves are only allowed to flow in one direction, and the installation is directional. According to the channel direction of Marine valves, there are bellow types: 1) Though way Marine valve. 2) Y way type Marine valve: in Y way Marine valve, the valve port and into the mainstream as a way of an oblique line, so that the flow state damage is much smaller than conventional Marine valve, so the loss of pressure across the valve also small. 3) Angle type Marine valve: in the horn type Marine valve, the fluid can only be changed in one direction, so the pressure drop of this valve is smaller than that of the conventional structure. 4)Others Should you have any question or opinion of the marine valves, pls feel free to contact us China Century Marine Equipment Co Ltd

Water Floating Platform Safety The development of water transportation is one big factor that promotes the development of the water platforms such as floating docks. In recent years, a number of floating docks have been built for the need of boat or jet ski mooring and other usages. So it is very important to pay attention to the safety of the water floating platforms. For water platforms, anti-skidding is very important. It is easy to reach the side edge of the water, and the physical contact with the ground, with the mixture with water, it is very common to see people fall down. Therefore, when we are building a water platform, we should choose materials with excellent anti-skid performance. For example: the floating buoy has excellent anti-skid performance and so on. And if there is waves, we should be more careful when walking or using the water platforms,. The bad construction of the water platform. It will cause a safety accident too . Should you have any opinion or question about the above, you are welcome to contact us China Century Marine Equipment Co.,Ltd.

What Cause the Marine Gangway Damage When using the marine gangway, it will cause different degrees of damage, and there are many reasons. Considering the use range of the marine gangway, the following are the main points that lead to the damage. 1. Ship overloaded This kind of damage often happens in the gangway, especially the old gangway, which tends to crack in the weak part of the structure. The crack is generally in the length of the gangway. 2, Friction This usually occurs in fixed type V and D fender. The fender mainly has the damage such as Angle, crack, surface abrasion and so on. The main reason for this damage is that the friction between the ladder and the ship is too big. 3. Anchorage and poor gangway connection. This happens in all kinds of gangways. The gangway is loosen, detached, falling off into the sea and also lead to other abnormal phenomena. The main reason for this phenomenon is the bolts or chains are not good, or the maintenance has not been done. Anchor bolts, chains and other metal materials of fixed fender are corroded extremely fast in this environment, and they are not easy to be replaced, which causes the gangway to be fixed, and then seriously affect the normal use of the fender. Should you have any other opinion or question or inquiry as to the marine gangway and ladder, pls contact us China Century Marine Equipment Co.,Ltd.

There are many reasons for the vibration of the pump room and unit.Here are a few reasons for the vibration of Marine pumps. 1. Electric problem,. If the motor is misaligned inside, it often causes vibration. For example, when the asynchronous motor runs, the magnetic center of the stationary rotor is different and the deviation will cause periodic vibration and noise. 2. Machinery. Poor quality of motor and water pump, rough manufacture and damage of sealing parts can also cause vibration. 3. Hydraulic problem. Pump inlet velocity and pressure are imbalance, and the working fluid flow around, and erosion, etc., are very easy to cause water pump`s vibration, and vibration noise is inevitable. The opening, stopping or emergency stop of the pump will cause the pressure change in the water pipe which will also cause the vibration of the Marine pump. 4. Others. The design of the unit is defective, and the flooding degree of the water pump is not correct with other equipment parts, the condition of water inlet is poor,all will cause the vibration of the pump room. Should you have any question or opinion of above, you are welcome to contact us--China Century Marine Equipment Co.,Ltd.

The anchor chain is used to connect a ship hull and anchor,,with the function of passing the anchorage force and the external force of the ship. A complete anchor chain consists of several short chains by using shackles, swivals.Bellow is the normal catagory of the anchor chains types. (1)According to the link structure: the anchor chain is divided into two types: the stud chain and the studless hain. Under a same condition, the strength of the stud chain is larger than that of the studless chain. The tensile strength is about 20% bigger, and the deformation is small, and it is not easy to twist when stacked. Therefore, it is widely adopted on the ship. The studless chain is usually used only for small boats. (2)According to the manufacturing methods: chain can be divided into cast steel chain (cast steel cable), welded chain( weldedcable) and forged chain (forged cable), etc. The characteristics of welded chain are: have advanced technology, simple, low manufacturing cost, high quality, more than other kinds of anchor chain. Currently it is widely used for ships. Cast steel anchor chain is characterized by high strength, good rigidity, no looseness and long service life. The disadvantage is that the manufacturing cost is higher and the impact load is poor. (3)According to the grade of steel: there are three grades: Al, A2 and A3. The bigger the grade, the bigger he intensity. The steel grades used for the production of stud chain are classified as AMl, AM2 and AM3, and AMl anchor chain steel is composed of sedation steel, AM2 and AM3 chain steel is composed of sedation and fine crystal processing steel. For the same ship, if the strength of the steel is big, the link size can be reduced appropriately.

Marine airbag has become an important auxiliary tool for ship industry, especially used in the ship's launchingand lifting,the airbag has an irreplaceable role. With th airbag, it can greatly cutdown the limitation of the ship and overcome the disadvantages of the traditional slipway launching. When we choose a right marine airbag size, we need to consider its diameter and the effective length as bellow; How to Choose the diameter The diameter of marine airbags is determined by the height of block beams which are used to support the items you want to move. For example, you can choose marine airbags with diameters no less than 1.5m when the support block is 1m in height. For marine salvage airbags, the most important thing you need to concern is buoyancy, which determine the diameter and length of rubber body. (Note: If marine salvage airbags are going to be used in deep water, the pressure of airbag should be taken into consideration to make sure that the rubber body can withstand high hydraulic pressure.) For heavy lifting airbags, the diameter is determined by component plies. Normally, mid-pressure airbags are suitable to lift light items such as vessels whose launch weight is below 2000 tons. High pressure airbags are designed for heavy duty work. Normally, airbags with 6 piles are suitable for almost all types of lifting work, but for some rugged applications, airbags with 7 or 8 piles are needed. For instance, when lifting heavy structures with limited contact surface, airbags with higher pressure and more piles are the best choice for providing higher safety. How to Choose the effective length. For single row arrangement, the length of them should no less than the maximum width of the item you want to move. For two rows of airbags, the total length of marine airbags can be estimated to be the effective length plus the diameter of marine airbags. For example, if the effective length of airbags is 14m and the diameter is 1.3m, then its total length is 15.3m. Welcome to contact China Century Marine Equipment for marine airbags cooperation.