• The pressure in the pine line push the seat ring moving towards ball, thus form the sealing; as the sealing is formed by the line pressure itself, the performance will be better, in the mean time, it also reduced the operation torque of the actuator; while the ball cavity pressure exceed the line pressure, the pressure difference will push the seat off the ball to release the excessive pressure to the pipe pine; when the temperature rises, it won’t cause abnormal pressure rise in the valve cavity.
• The pressure can be released to zero when the valve is in full close, full open or under pipe line pressure; also, the seeper, dirt or deposit can also be eliminated by removing the drainage plug on the valve body
• In case the sealing element is destroyed by eye winker in the pipe line or smashing, sealant will be used to avoid leakage; the stem is designed with two part sealing, and sealant can be injected between.
• ven when the seal is burned down by fire, the metal to metal seal design will be applied to avoid spread of fire.
• Body to use high quality forged steel, with welding on the mid body, formed one piece; appearance design, high strength, light in weight, smart in volume; bolts and nuts are not adopted, thus no leakage point; suitable for under ground application.
• he ball is supported by upper stem and the lower trunnion; the ball axle is maintained in it’s centerline, thus is good in sealing and operation; the low friction TFE in the stem and trunnion part enables the valve to operate smoothly and simply under pressure.
• The ball valve series is maintenance free, thus greatly reduced user’s cost; the bearing, seal are adopt low friction co efficiency material, no lubricate is required

valve@coosaivalve.com