Nonfiction 12

Download AWWA standard for rubber-seated butterfly valves by American Water Works Association.; American National PDF

By American Water Works Association.; American National Standards Institute

Show description

Read or Download AWWA standard for rubber-seated butterfly valves PDF

Similar nonfiction_12 books

Ninth Underground Operators' Conference Proceedings 2005

The Underground Operators’ convention has been accumulating energy ever because the first convention used to be held in 1977. The 2005 convention was back an exceptional chance for proprietor and agreement miners and their linked providers, experts and researchers to have interaction in a typical discussion board to debate a couple of working matters that experience faced and been solved via the underground mining neighborhood.

Additional resources for AWWA standard for rubber-seated butterfly valves

Example text

Piping considerations should include allowable flange loadings, thermal expansion and contraction, and differential settlement. 3 When valves have adjustable seating, install the seat-adjustment side of the valve for access and adjustment in service. 4 Foreign material in a butterfly valve can damage the rubber seat when valves are operated. Be sure valve interiors and adjacent piping are cleaned of foreign material prior to mating up valve-to-pipe-joint connection. 5 Prepare pipe ends and install valves in accordance with the pipe manufacturer’s instructions for the joint used.

Actuator components between the input and these stops shall be designed to withstand, without damage, a rim pull of 200 lb (890 N) for handwheel or chainwheel and an input torque of 300 ft-lb (406 N·m) for wrench nuts. 3 Actuators for buried service valves shall be not less than 90 percent grease packed and totally sealed using gaskets, O-rings, or similar means. The valve shaft shall be fully enclosed with a housing, including where it connects to the actuator or bonnet extension. 4 The manufacturer shall select a representative actuator within each of the torque ranges for proof-of-design testing purposes.

Lift these valves with eye bolts or rods through the flange holes or chain hooks at ends of the valve parts. 3: STORAGE If it is not practical to store the valve indoors, protect the valve and actuators from weather and the accumulation of dirt, rocks, and debris. When valves fitted with power actuators and controls are stored, energize electric actuators or otherwise protect electrical-control equipment to prevent corrosion of electrical contacts caused by condensation resulting from temperature variation.

Download PDF sample

Rated 4.30 of 5 – based on 43 votes