Didtek forged steel gate valves are available in three bonnet designs. The first design is the Bolted Bonnet, with male-female joint, made in F304/graphite. Ring joint gasket are also available on request. The second design is the welded bonnet with a threaded and seal welded joint.  The third design is the pressure seal bonnet, with a threaded and pressure seal bonnet joint.
Didtek gate valve confirm to API602, BS5352 and ASME B16.34. Each are tested according to API598, and marking is per MSS SP-25.