Double Block and Bleed Valves- DBB4
Introduction
The unique combination of double block and bleed valve systems enable a smooth transition from the process piping system
to instrumentation, providing fewer potential leak points, lower installd weight, and a smaller space envelope.
Applications
* Process piping isolation points
* Direct mount to instruments
* Close coupling of instruments
* Double block and bleed isolation
* Vents and drains
Features
* Maximum working pressure up to 10000 psig (689 bar)
* Working temperature up to 1200°F (649°C) with Graphite packing
* Colour coded valve function identification
* Every valve is hydraulic pressure tested in accordance with EN 12266-1 and API 598. Every set is
tested with nitrogen for leak-tight performance at 6000 psig
* Fire-tested design in accordance with BS 6755 part 2/API 607
* Flanged connections comply with ASME B16.5 RF and RTJ
* Pressure ratings in accordance with ASME B16.34
Ball Type Valve specification
Features
* Maximum working pressure up to 10000 psig (689 bar)
* Working temperature are as follows:
PTFE: -65°F to 450°F (-54°C to 232°C )
PEEK: -65*F to 450°F (-54°C to 232°C )
* Actuate at quarter-turn
* Directional stem flats show open or closed position
* Bottom-loaded stem prevents stem blowout and enhances
system safety
* High-strength stem bearing provides smooth actuation and
eliminates galling between valve stem and body
* It may be required to adjust the packing during the service
life of the valve
* Hikelok ball valves are designed to be operated in a fully open
or fully closed position
Needle Type Valve specification
Features
* Maximum working pressure up to 10000 psig (689 bar)
* Working temperature:
PTFE packing: -65*F to 450°F (-54'C to 232°C )
Graphite packing: -65°F to 1200°F (-54'C to 649°C )
* Two-stem design: thread hardened upper stem and smooth surface
hardened lower stem
* Upper stem thread lubricant is isolated from system fluid
* The nonrotating lower stem, linearly instead of helical movement, avoids
galling damage to the seat and tip, as well as reduces the total friction area
between the packing and the lower stem
* Stem back seating seals in fully open position
* Panel mounting is available as an option
* Double lock pins enable steady and durable fastening of the handle
* Handle of different colors are available for option
OS&Y Needle Type Valve specification
Features
* Maximum working pressure is 10000 psig (689 bar)
* Working temperature are as follows:
PTFE: -65F to 450°F (-54°C to 232°C)
Graphite: -65°F to 1200°F (-54°C to 649°C )
* Two-stem design: thread hardened upper stem and smooth surface
hardened lower stem
* Upper stem thread lubricant is isolated from system fluid
* The nonrotating lower stem, linearly instead of helical movement, avoids
galling damage to the seat and tip, as well as reduces the total friction area
between the packing and the lower stem
* Bolted bonnet enhance strength and reliability
* Back seat design provides secondary stem sealing and prevents stem blowout
* Adjustable gland flange alows easy access to the packing gland and packing
adjustment for an effective stem seal
* Investment case yoke is formed by precision casting which enhances strength
and perfect stem alignment
* Two handle pins make the handle fixed firmly and lastingly
Double Block and Bleed Valves
Features
* Utilising bar stock body
* Standard high performance bonnet design
* Optional port sizes and thread forms available
* Combinations of ball pattern and needle pattern valves in various configurations
* Suitable for double block and bleed of instrument
* Easy operation
* Complete traceability of materials
Certificates
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