Marine tanker cast iron gate valve CB/T3591-94

Marine tanker cast iron gate valve CB/T3591-94 advantages

1, small flow resistance. The medium channel inside the valve body is straight through, the medium flows in a straight line, and the flow resistance is small. 2, less effort when opening and closing. It is compared with the globe valve, because whether it is open or closed, the direction of the ram movement is perpendicular to the direction of the medium flow. 3, high height, long opening and closing time. The opening and closing stroke of the gate is large, and the fall is carried out by the screw. 4, water hammer phenomenon is not easy to produce. The reason is the long shutdown time. 5, the medium can flow to either side in any direction, easy to install. Both sides of the gate valve channel are symmetrical. 6, the structure length (the distance between the two connected end faces of the shell) is small. 7, the sealing surface is easy to wear, affecting the service life. When opening and closing, the two sealing surfaces of the gate plate and the seat rub and slide together, which is easy to produce abrasion and wear under the action of medium pressure, affecting the sealing performance and shortening the service life. 8, the price is more expensive. The contact sealing surface is more and the processing is more complicated, especially the sealing surface on the ram seat is not easy to process, and there are more parts. 9, simple shape, short structure length, good manufacturing process, wide range of application. 10, compact structure, valve rigidity is good, smooth channel, flow resistance number is small, sealing surface is made of stainless steel and cemented carbide, long service life, PTFE packing, reliable sealing, light operation

Marine tanker cast iron gate valve CB/T3591-94 defects

The sealing surface between easy to cause erosion and abrasion, maintenance is more difficult. The overall size is large, the opening needs a certain space, and the opening and closing time is long. The structure is more complex. The type of gate width according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate type, double gate type and elastic gate type; Parallel gate valves can be divided into single and double gate valves. According to the thread position of the valve stem, it can be divided into two kinds: open stem gate valve and dark stem gate valve. For a long time, the general gate valve used in the market generally has water leakage or rust phenomenon. The elastic seat seal gate valve produced by the introduction of European high-tech rubber and valve manufacturing technology has overcome the defects of poor seal and rust of the general gate valve. The elastic seat seal gate valve uses the elastic disc to produce a small amount of elastic deformation compensation to achieve a good sealing effect. The valve has the advantages of light switch, reliable seal, good elastic memory and service life. Can be widely used in tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electric power, ship, metallurgy, energy system and other body pipelines as a regulating and intercepting device used. Gate valve features: the body is made of advanced ball black cast iron, the weight is reduced by about 20% to 30% compared with the traditional gate valve weight, easy installation and maintenance. Flat-bottom gate seat: The traditional gate valve is often after the water washing pipe because of foreign objects such as stones, wood blocks, cement, iron debris, debris and other sludge in the bottom groove of the valve, easy to cause the formation of water leakage phenomenon, elastic seat sealing gate valve bottom with the same flat bottom design of the pipe machine, not easy to cause debris deposition, so that the fluid is unimpeded. The whole package: the ram adopts high-quality rubber for the whole inner and outer rubber, and the first-class rubber vulcanization technology in Europe makes the vulcanized ram ensure the precise geometric size, and the rubber and the ductile cast ram are then reliable, not easy to fall off and have good elastic memory. Precision casting valve body: The valve body is precision cast, and the precise geometry allows the valve body to be sealed without any finishing.

Cast iron gate valve is a kind of valve, with small flow resistance, high height, long opening and closing time, etc., the disadvantage is inconvenient maintenance. There are two types of cast iron gate valves: wedge gate valve and parallel gate valve.

Packing of Standard Packing:

 Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 2022 gallon liquid totes Special package is available on request. E FORUs’  is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.