• Voltech Tejas Valves Private Limited

Ball Valves, Investment Cast

Voltech hi-performance ball valves are reduced bore valves of three-piece sandwich construction with two body connectors, available in screwed or socket weld ends. The body of the valve fits between the connectors. It contains the ball, PTFE body connectors, seal and stem assembly. The corrosion resistant assembly is held between the body and connector bolting. This ensures leak tight shut-off in both directions under pressure or vacuum condition. The properties of low frictional PTFE seats are further enhanced by design to ensure positive shutoff, low torque of operation and absence of wear. Periodic maintenance and lubrication are not required, as PTFE seats possess self-lubricant characteristics. A special "Lip-Seal" design ensures retention of seal for many thousands cycles in handling oil, air, chemicals, gas, acids, alkali, oxygen, instrument isolation, freon, vacuum and other services. The stem assembly incorporates an anti-blow-out stem inserted from inside the body. The seal is effected by spring disc loading a PTFE stem seal positioned between shoulders on the stem and the body. The stem engages in a slot in the ball and so allows the ball to float under pressure. This results in leak tight shut off over the full operation range. Forging body of ASTM A 105 is also offered in carbon steel material of construction. Investment casting of body and connector ensures quality of material and machining by CNC adds up to quality and volumes in short notices. Stainless steel ball valves in CF8/CF8M are offered at par with international standards and volumes to meet project requirement of chemical/pharma and process industries.