Wey Knife Gate Valves have been in service successfully in various chemical and petrochemical applications for decades. The unique Wey design ensures bubble tight bi-directional shut off with reliable and long service life. These valves ensure that hazardous material such as Sulfur Dioxide, Acids and others are not released to the atmosphere. Ordinary knife gate valves are usually not suitable for chemical or petrochemical applications. Leakage is very objectionable. Bi-directional bubble tight shut off is a requirement. With our design and the material of construction compatible with the process we can dramatically increase valve service life.