If you are looking for a valve that is suitable for handling thick flows of liquids and sludges, then a knife gate valve is the answer. It can be found in several sizes and designs. These valves are typically found in heavy oil, wastewater, and pulp and paper industries. They are also used in various other industries, including power plants, chemical plants, and mining.
Knife gate valves feature a sharpened disk that cuts through media, such as pulp, grease, and slurry. After cutting through the media, the blade fits into an elastomer seal. The elastomer seal becomes abraded over time, which can negatively affect sealing performance.
Knife gate valves control the flow of material in bulk material handling systems. These valves have undergone several iterations since their inception. The conventional knife gate valve was developed for the pulp and paper industry. This valve is typically made of a stainless steel liner and gate, but other materials are available.
Normally, the blade of the valve advances and closes the passage, but this can be reversed. When the valve is in the closed position, the gate is sealed by two body seats. If the seal is damaged, it can cause downtime or lower production.
Typical materials for a knife gate include metals like cast iron and stainless steel. However, there are other materials, including polymer and thermoplastics.
Knife valves come in many different sizes, so you’ll want to consider your specific application before choosing. Depending on the size, you’ll need to determine whether you want to install the valve in a vertical or horizontal orientation.
What Are Knife Gate Valves Used For
A knife gate valve is used in a variety of industries. It is used to control the flow of liquids, powders, and solids. This type of valve is primarily designed for on/off service.
A knife valve inserts a blade into an elastomer seal, which is then seated onto a yoke. The yoke is made of similar materials as the valve body. Generally, the blade is metal, although it can also be made from thermoplastics.
The blade is able to cut through a range of materials, including sludge, slurry, and varnish. They are ideal for wastewater management. But knife valves can also be used in other applications, such as in heavy oil and pulp and paper industries.
Knife valves are easy to maintain, with only a few maintenance steps. Some of these include lubricating the stem and stem nut every three months. Also, changing packing once a month is necessary.
Knife gates were first developed for the pulp and paper industry. They are still in use today in industrial processing plants all over the world. However, technology has advanced significantly.
Today, there are many different types of knife valves. While the conventional design is still used, a new design known as the Through Gate has been introduced. This design allows for higher fiber content in the water. Consequently, it is less likely to be impacted by corrosion.
Another design is the slide gate. This feature uses a stainless steel rectangular slide plate to “self-clean” the material in the seat.
Knife Gate Valve Manufacturer—Xintai Valve Group
XINTAI Valve is a professional and one of the leading manufacturer worldwide for industry valves products, involving six ranges and thousands of varieties, for control valve, cryogenic valve, gate valve, globe valve, ball valve, check valve, butterfly valve, power station valve, oxygen valve, hydraulic control valve, thread valve and antibiotic valve.The company is also famous for its high-quality products, specialized services, and long-standing customer relationships.
