Disadvantages of cast iron gate valve

Author:gate valve     Published time:2019-02-21 10:09     Reading times:327    

The disadvantages of cast iron gate valve, what are the disadvantages of cast iron gate valve? What is the characteristic of cast iron gate valve? Today we will sort out the features of cast iron gate valve for you.


Cast iron gate valve disadvantage


Erosion and abrasion are easily caused between the sealing surfaces, and maintenance is difficult. The external dimensions are large, and a certain space is required for opening, and the opening and closing time is long. The structure is more complicated. The types of gate width can be divided into wedge gate gate valve and parallel gate gate valve according to the sealing surface configuration. The wedge gate gate valve can be further divided into: single gate type, double gate type and elastic gate type; parallel gate type gate valve can be Divided into single gate type and double gate type. According to the thread position of the valve stem, it can be divided into two types: open gate valve and dark gate valve.


The general gate valves used in the market for a long time are generally leaking or rusting. The introduction of European high-tech rubber and valve manufacturing technology to produce elastic seat sealing gate valves overcomes the defects of general gate valve sealing and rust, and elastic seat sealing gate valves. The compensation function of the elastic ram to generate a slight elastic deformation achieves a good sealing effect, and the valve has the remarkable advantages of light switch, reliable sealing, good elastic memory and long service life. Can be widely used in tap water, sewage, construction, petroleum, chemical, food, pharmaceutical, textile, electric power, shipbuilding, metallurgy, energy systems and other body pipelines as a regulating and intercepting device.


Characteristics of the gate valve: The body is made of high-grade ball black cast iron, and the weight is reduced by about 20%~30% compared with the traditional gate valve, which is convenient for installation and maintenance.


Flat-bottomed gate: Traditional gate valves are often deposited in the groove of the valve bottom due to foreign objects such as stones, wood blocks, cement, iron filings, debris, etc. after the water is washed, which is easy to close and form a water leakage phenomenon. The bottom of the elastic seat sealing gate valve adopts the same flat bottom design as the water pipe machine, which is not easy to cause debris accumulation, so that the fluid is unobstructed.


Integral encapsulation: The ram is made of high-quality rubber for the whole inner and outer rubber. The first-class rubber vulcanization technology in Europe enables the vulcanized ram to ensure precise geometrical dimensions, and the rubber and spheroidal cast slabs are secure and not easy to fall off. Flexible memory is good.


Precision cast body: The valve body is precision cast, and the precise geometry allows the valve body to be sealed without any finishing.


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