Aptek engineers offers instrumentation valves. These manifold valves are designed for highly accurate application. These valves come in the standard size of npt f. Available in different types such as 2. 3 and 5-way block type or flange type to suit the different applications. These valves are available in various materials such as ss 316. Ss 304, carbon steel and many more. Different seals such as teflon, graphite, asbestos can also be offered to suit the various applications.