Rising stem manual cast iron knife gate valve is also called rising stem slide gate valve, rising stem knife type gate valve, rising stem knife blade gate valve, rising stem knife edge gate valve, rising stem slurry gate valve, rising stem mud gate valve. The opening and closing part of rising stem knife gate valve is one blade-like plate, whose movement direction is perpendicular to the flow direction of the medium. The rising stem knife gate valve is using the sharp blade-like plate which can cut off the fiber to shut off the medium flow.
There is actually no chamber inside the rising stem manual cast iron knife gate valve body, the gate of the rising stem knife gate valve moves up and down in the side guide groove, and is pressed tightly on the valve seat by the lug at the bottom. The O-shape resilient sealing seat can be used to realize bi-directional sealing effect.
The installation space for rising stem knife gate valve is small, and the working pressure of rising stem knife gate valve is low, it is not easy to accumulate sundries inside the body of rising stem knife gate valve, and also the cost for rising stem knife gate valve is relatively low and affordable.
Introduction for Rising stem manual ductile cast iron knife gate valve-Chinese custom manufacturer
Products name: rising stem manual cast iron bidirectional sealing knife gate valve
Nominal diameter: 2″-24″
Nominal pressure: 150LB
Body material: ductile cast iron
Plate material: stainless steel
Sealing material: natural rubber
Sealing direction: bidirectional sealing.
Applicable media: slurry, ash slurry, paper slurry, mud, waste water/sewage,etc.
The thin rising stem knife gate valve completely solves the large flow resistance,heavy weight,difficult installation,large installation space and other problems of ordinary gate valves, flat gate valve, ball valves, globe valve, regulating valve, butterfly valve,and other types of industrial valves with its advantages of small size, small flow resistance, light weight, easy installation, and easy disassembly. After the rising stem knife gate valve appeared, a large number of general cut-off valve and regulating valves have been replaced by it. To this day, the largest demand amount for knife gate valves in the world is the United States and Japan. The rising stem knife gate valve can work normally under the working pressure 1.0Mpa-2.5Mpa, and the working temperature of -29-550℃. the valve gate of the knife gate valve has a shearing function, which can scrap off the sticky matter on the sealing surface and automatically removes debris, the gate of knife gate valve is made of stainless steel materials, which can prevent the sealing leakage caused by corrosion.
The sealing principle of rising stem ductile iron knife gate valve:
When the rising stem knife gate valve is closed, the sealing surface can be sealed only by the medium pressure, that is, replying on the medium pressure to press the sealing surface of the rising stem knife gate valve plate to the valve seat on the other side to ensure the sealing effect of the sealing surface of the knife gate valve, this sealing structure is called self-sealing. While most of the gate valves are forced sealing structure, that is to say, when the gate valve is closed, the gate should be pressed to the valve seat by external force, so as to ensure the sealing effect of the sealing surface. The rising stem knife gate valve should generally be installed vertically in the pipeline.
Belo Valve can is one Chinese OEM manufacturer for knife type gate valves, including rising stem knife gate valve, non rising stem knife gate valve, ductile iron knife gate valves, carbon steel knife gate valves, stainless steel knife gate valves, unidirectional sealing knife gate valves, bidirectional knife gate valves.