What is Jamesbury valves?
Jamesbury Wafer-Sphere™ high-performance butterfly valves combine unique off-center disc, proprietary seat design and Xtreme™ sealing technology. Tight, long-lasting sealing, and yet light and low-cost design makes it a good alternative to gate valves and other heavier rotary-type designs.
What is difference between gate valve and ball valve?
The main difference is in the operation. A gate valve moves a solid disk up and down to open/close the orifice. A ball valve rotates a ball (the orifice) with a bore in it 90 degrees to open/close the valve.
What is double and triple offset butterfly valve?
Two are placed in a similar position to the double offset butterfly valve, while the third offset is the geometry of the seating surface, creating a type of cone shape of the disc and seat. The triple offset valve is used in similar industries as the double offset butterfly valve, but in more demanding applications.
What is difference between API 6FA and 607?
API 607 provides fire test criteria for quarter-turn valves and other valves with nonmetallic seating under pressure, whereas API 6FA provides the fire testing requirements for API 6A and API 6D valves. API 6FA is applicable for metal seated valves.
What is api6fa?
API SPEC 6FA, 3rd Edition, April 1999 – Specification for Fire Test for Valves. It is the purpose of this document to establish, the requirements for testing and evaluating the pressure-containing performance of API 6A and 6D valves when exposed to fire.
Can Ball Valves be repaired?
The only repair for a ball valve is replacing the packing washer. If the actual ball on the valve becomes deteriorated, it will leak. In that case, the entire valve must be replaced.
What are three common valve failures?
Valve failures are often the result of detonation, poor quality or defective valves, a driver who’s zinged the engine, improper valve lash, or sloppy machining. Valve seat concentricity is critical for proper alignment and a tight compression seal.
What do you need to know about Jamesbury valve solutions?
Jamesbury Valve Solutions FM-Approved Emergency Shut-Off Heat Activated Valves (FM Figure 1075) These valves provide emergency shut-off for flammable gases, liquids and toxic fluids where ambient temperatures exceed acceptable limits. FM-approved and available with fusible links for 165° F (73° C) to 200° F (93° C) shut-off.
What kind of company is Metso flow control?
Metso Flow Control has become a separately listed independent company called Neles. Neles is a flow control solutions and services provider for oil and gas refining, pulp, paper and the bioproducts industry, chemicals, and other process industries.
What kind of testing is done on Metso valves?
Metso products are qualified with intense cryogenic, fire, temperature and pressure testing in our engineering and development laboratories.
What’s the temperature of a Jamesbury butterfly valve?
JAMESBURY VALVE SOLUTIONS When combined with our unique and application- proven seat designs, proprietary Xtreme seating materials broaden Wafer-Sphere butterfly valves’ temperature and pressure applicability. With Xtreme seats, applica- tion temperatures range from -320°F to 500°F and pressuresup to 1480 psi.