TTF Y type forged steel valve has three types of bonnet. One is bolted bonnet, which the body is connected with bonnet by bolts and sealed by spiral gasket (316SS filled flexible graphite), and available to follow metal sealing ring for special requirements by the client.; one is welded bonnet, which the body is screwed and fully welded sealing; another is pressure-in bonnet, which the body is screwed into the bonnet and sealed by inner pressure-in ring.
It is available to design into Y type globe valve and check valve.