One Piece DBB Ball Valve with RF NPT end

One Piece DBB Ball Valve with RF NPT end introduction
One Piece DBB Ball Valve with RF NPT end (double block and bleed ball valve) is like having three valves in one.API 6D defines a double block and bleek ball valve as a "single valve with two seating surfaces that, in the closed position, provides a seal against pressure from both ends of the valve with a means of vending/bleeding the cavity between the seating surfaces."
There are a couple different styles of double block and bleed valves. One style has two independently seating valves inside, with a bleed or drain valve. This configuration is referred to as a double isolation and bleed (DIB). The DIB valve can isolate either side of the valve (bi-directionally) to vent or bleed the cavity and isolate piping.
 
Using a single double block and bleed valve system versus 3 separate valves saves installation time, weight on the piping system, and space. One Piece DBB Ball Valve with RF NPT end also cuts down the number of leak paths to the atmosphere, reducing the risk of hazards when transferring liquids dangerous to humans or the environment.
 
One Piece DBB Ball Valve with RF NPT end parameter
Body material: Carbon Steel, Stainless Steel, Alloy Steel.
Normal diameter: 1/2 - 4 Inch (DN15 - DN100).
End connection: Flanged X NPT.
Pressure range: 150 - 3000 LB/ 15000 PSI.
Working temperature: -46℃ - +350℃.
Structure: (ball/needle/ball), Reduce Bore, One Piece Body.
Design: EEMUA 182, ASME B16.34.
Body Pattern: One Piece.
End Connection: RF Flanged x F-NPT.
Face to face: as per manufacturer's standard.
Test and inspection: EEMUA 182, API 598.
Operation: lever.

One Piece DBB Ball Valve with RF NPT end application
One Piece DBB Ball Valve with RF NPT end is most commonly used in the oil and gas industry, but can also be helpful in many other industries.
It's typically used where bleeding the valve cavity is required, where piping needs isolation for maintenance, or for any of these other scenarios:
Level Measurement
Pressure Measurement
Chemical Injection
Sampling
Flow Measurement
Prevent product contamination
Remove equipment from service for cleaning or repair