Description: Three way ball valves include L-port and T-port ball valves in sizes 15 to 150 mm in CS and SS application; and valves for duplex filters, heat exchangers, multiport lines and chemical processing industries. Materials of construction are SS 304/SS 316/monel/hastelloy C, and carbon steel to meet various requirements. 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-seat design ensures retention of seal for many thousand cycles in handling oil, air, chemicals, gas, acids, alkali, oxygen, instrument isolation, freon, vacuum and many other services. These valves have triple tier sealing arrangement across the stem to prevent leakage. The primary seal between body and stem is effected by a PTFE O-ring, secondly, carbon filled gland packing and stainless steel gland material provide functions of flexibility and rigidity at the top of the stem to prevent any leakage across the stem length. Thirdly, the two Belleville spring washers, live load and stem and adjust for any wear or expansion and contraction due to temperature fluctuations. A slit nut at the top prevents unnecessary movement of sealing rings and completely eliminates gland leakage problems associated with rising stem gate/globe valves. The valves are available in screwed, socket weld, flanged ends to ASA class 150, ASA class 300, British standards, BS 10 and DIN standard drillings as option. Arrangement for dairy/ pharma applications is also offered on end connection. Extended socket weld end and other minor design charges are also custom built to meet customer requirement. Voltech Tejas Valves offers three way ball valves.
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