Lined 10'' butterfly valve outlasts competitive valves in brine filter system

Journal Article · Mon Mar 01 04:00:00 EST 1982 · Chem. Process. (Chicago); (United States)

OSTI ID:6899965

Gaines, A

One of the world's largest chlorine production units located in the Gulf Coast area has an extensive brine piping system with a large number of valves. Some of the valves performed well but many failed to meet the service requirements, especially in the brine filtering system with the salt solution at ambient temperatures and pressures about 100 psi. One of these was a 10'' valve. Various types of gear-operated butterfly valves, with an elastomer lining to withstand the somewhat corrosive solution, had been tried but developed leaks and had to be repaired or replaced after 4 to 6 months. The valves became difficult or impossible to operate in some cases when brine leaking past the stem seal attacked the inner surface of the metal valve body and the liner was dislodged by the movement of the disc. In September 1980, a 10'' butterfly valve specifically designed for bubble-tight shut off and zero stem leakage was installed in the brine filter line on a trial basis. The valve has a 1-piece, epoxy-coated ductile iron body with a molded one-piece liner of Hypalon rubber, and a stainless steel stem and disc with splines instead of pins to provide a trouble-free connection. The stem is positively sealed against leakage by a patented spherical machining process on both the disc and the liner. The valve was furnished with a variable ratio gear actuator that has higher torque output when the disc begins to make contact with the seat to assure a bubble-tight shutoff with minimum input torque. The butterfly valve has provided leaktight performance since it was installed in September 1980 and is still easy to open and close by the geared actuator.

• Research Organization: Chemical Processing, Chicago, IL
• OSTI ID: 6899965
• Journal Information: Chem. Process. (Chicago); (United States), Journal Name: Chem. Process. (Chicago); (United States) Vol. 45:3; ISSN CHPCA
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320303 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Equipment & Processes
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AMBIENT TEMPERATURE
BRINES
CHLORINE
COATINGS
CONTROL EQUIPMENT
CORROSION PROTECTION
COST
DATA
ELASTOMERS
ELEMENTS
EPOXIDES
EQUIPMENT
EXPERIMENTAL DATA
FILTRATION
FLOW REGULATORS
HALOGENS
IMAGES
INFORMATION
LEAK TESTING
MEDIUM PRESSURE
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
PRODUCTION
PROTECTIVE COATINGS
RUBBERS
SEPARATION PROCESSES
TESTING
VALVES