The term Gate Valve descends from the words gatan, gap, gasse and gat, and implies a passage which has a barrier, that is hinged somewhere, allowing it to be OPENED and CLOSED.Some on the first known gate valves were utilised by the Egyptians, Greeks, and Romans when irrigating fields with water find more. These were simple wooden barriers, but they also were well-suited with the requirements with the task.
In the 1800s, intensive growth and development of gate valves moved quickly forward because of their increasing used in industrial operations. Over time materials involved in their manufacture were improved and modified geared to different applications.
Gate valves are inclined to the solid wedge or disc getting stuck relating to the seats caused by differential contraction relating to the valve seats plus the wedge during shutdown of temperature piping system. The piping system has to be reheated to the disc to search smoothly again. This makes the gate valve unsuitable for easy use in piping systems susceptible to high fluctuations in temperature. However, this issue can be overcome by making use of gate valve with flexible wedges.
Solid wedge gate valves are understanding of thermal expansion loads or bending moments which could cause the wedge or disc to lock relating to the valve seats or lead to improper seating of wedge between seats and leakage through the valve seats.
Gate valves being metal seated usually do not provide bubble-tight shut-off and may not be found in applications where small leakage throughout the seats are certainly not permissible.
Structural characteristics of rising-stem gate valve:
The general gate valves applied to the market for quite a long time generally have water leakage or rust. The company introduces the elastic seat seal gate valve created by European high-tech rubber and valve manufacturing technology, which overcomes the defects of poor sealing and rust of general gate valves gate valve. The sealing gate valve uses the compensation effect on the elastic disc to make a small amount of elastic deformation to attain a good sealing effect. The valve gets the obvious features of light switch, reliable sealing, good elastic memory and service life. It might be widely used being a regulating and intercepting device within the pipelines of plain tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, power, shipbuilding, metallurgy, energy system, etc.
In the 1800s, intensive growth and development of gate valves moved quickly forward because of their increasing used in industrial operations. Over time materials involved in their manufacture were improved and modified geared to different applications.
Gate valves are inclined to the solid wedge or disc getting stuck relating to the seats caused by differential contraction relating to the valve seats plus the wedge during shutdown of temperature piping system. The piping system has to be reheated to the disc to search smoothly again. This makes the gate valve unsuitable for easy use in piping systems susceptible to high fluctuations in temperature. However, this issue can be overcome by making use of gate valve with flexible wedges.
Solid wedge gate valves are understanding of thermal expansion loads or bending moments which could cause the wedge or disc to lock relating to the valve seats or lead to improper seating of wedge between seats and leakage through the valve seats.
Gate valves being metal seated usually do not provide bubble-tight shut-off and may not be found in applications where small leakage throughout the seats are certainly not permissible.
Structural characteristics of rising-stem gate valve:
The general gate valves applied to the market for quite a long time generally have water leakage or rust. The company introduces the elastic seat seal gate valve created by European high-tech rubber and valve manufacturing technology, which overcomes the defects of poor sealing and rust of general gate valves gate valve. The sealing gate valve uses the compensation effect on the elastic disc to make a small amount of elastic deformation to attain a good sealing effect. The valve gets the obvious features of light switch, reliable sealing, good elastic memory and service life. It might be widely used being a regulating and intercepting device within the pipelines of plain tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, power, shipbuilding, metallurgy, energy system, etc.
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