Download AWWA standard [for] power-actuating devices for valves and by American National Standards Institute.; American Water Works PDF

By American National Standards Institute.; American Water Works Association

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Extra info for AWWA standard [for] power-actuating devices for valves and slide gates

Sample text

For potentially aggressive (low-alkaline) waters, a water analysis that includes total hardness, pH, CO,, and conductivity should be made and included in the purchaser's specifications. 3 Temperatures/pressure. 03 MPa) shall be used unless otherwise Specified. 5 Oil-hydraulic medium requirements. 1 Physical. Hydraulic oil shall have dirt and scale particles and water droplets removed to no larger than 10 pm. 8"C) unless otherwise specified. 2 Chemical. Hydraulic oil shall be used unless otherwise specified.

Quarter-turn hydraulic or pneumatic actuatoP: T h e proof-of-design test for a quarter-turn cylinder actuator shall consist of the requirements of Sec. 1 Test procedure. Each actuator size shall be given a torque test equal to or greater than twice the rated torque, through one complete open-and-close cycle. The design shall also be verified by cycle testing of one production sample of each actuator body size through full cycles with full rated torque at the point of unseating and a minimum of 30 percent of the rated torque during the open-andclose stroke.

3. One test-5,000 cycles. 4. Off time-10 min maximum between cycles. 5. Seating torque-rated torque, unit housing size. 6. Running torque-30 percent (minimum) of seating torque. Copyright American Water Works Association Provided by IHS under license with AWWA No reproduction or networking permitted without license from IHS Licensee=Earth Tech Inc/5906698001, User=Yanez, Simon Not for Resale, 05/08/2008 13:28:53 MDT --`,,```,,`,`,`,`,,,`,,`,,,`,,-`-`,,`,,`,`,,`--- working order prior to shipment.

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