We are India based most reputed and reliable manufacturers and suppliers of Duplex stainless steel Double Block and Bleed Valves. DSS Double Block and Bleed Valve or a duplex stainless steel DBBV, primarily known as Double Block and Bleed Valve (DBB) can perform the tasks of 3 separate Valves (2 separate isolations and 1 drain Valve) alone which apart from being hugely space saving can also save on weight and time due to installation and maintenance practices requiring much less work and the operator being able to locate and operate all 3 Valves at one point. These duplex steel valves provide compact installation for gauge or transmitter instruments and are alternative to multi valve systems. Because of this unique feature these kind of valves are highly demanded on the maintenance and shut down operations usually or to the applications where space and weight do matters.
Our manufactured Duplex Stainless Steel Double block and bleed Valves operate on the principle that isolation can be achieved from both the upstream and downstream process flow / pressures.This is achieved by the design of two ball, gate, globe, needle, etc. Valves placed back to back, with a third "isolatable" Valve in the center cavity. Once isolation has been achieved in one or more of the main process isolation Valves, the cavity that is created between these isolations can be drained out. .API 6D defines a duplex steel double-block-and-bleed Valve (DBB) 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 venting /bleeding the cavity between the seating surfaces."
Our manufactured and supplied Duplex Stainless Steel Double Block and Bleed Valves have replace existing traditional techniques employed by pipeline engineers to generate a double block and bleed configuration in the pipeline.
We are manufacturers, suppliers and exporters of Duplex Stainless Steel Manifold Valves mainly three applications
Duplex Steel DBB Valves Advantages
- Duplex Stainless Steel Double Block and Bleed Valves reduces the possibilities of leakages or points of leakages while comparing to generall pipe line valves system.
- Duplex Stainless Steel Double Block and Bleed Valves are compact in size by which they become best suitable for the applications where space is a matter of consideration.
- SinceDuplex Stainless Steel Double Block and Bleed Valves elemenets many components from the pipe line and get replaced on theire place it saves lots of time as well.
Duplex Steel DBB Valves Main Functions
Here we would like to suggest that a user should see the design of a particular Valve, and find out exactly what type of "double positive isolation" or "double block and bleed." we manufacturer, to make sure it's really what's needed in a particular application.
Instrumentations Duplex Steel DBB For Pressure Connections
Duplex Steel DBB valves for pressure connections are generally used
to isolate instrumentation
such as pressure indicators and lever gauges.
the help of side side image impression we can understand how a DBB
Valve is constructed look.
In this image example, two balls are mounted. These DSS DBB valves are useful for flow sampling, diverting or injection situations, and for maintenance and or integrity check situations where seat leakage can be monitored through the third "bleed" Valve
Duplex steel Double Block and Bleed valves have evolved to replace the process of bolting together individual valves to provide dual isolation. This new assembly provides great savings in weight, space and installation times especially in instrument or instrument cage isolation. These Duplex steel Double Block and Bleed valves can save as much as 60% in weight and studies have shown that a 70% installation time saving is also possible. However the greatest savings are to be seen in reducing the risk of the potential hazards this entails because of the reduction of leak paths to atmosphere. Dual isolation is a necessary requirement when maintenance is taking place downstream of the first isolation valve. Cavity venting is provided by either a ball or globe OS&Y vent valve so that trapped pressure between the two isolation valves is safely vented. These duplex steel valves have also evolved to encompass the function of chemical injection (using a suitable quill) and sample points. In-built check valves are often integrated in these valves.
Duplex Steel Ball, Needle, Ball DBB Valves
manufacture Duplex stainless Steel Ball, Needle, Ball design Double
Block and Bleed valves. These valves are manufactured with the state
of the art machine center, fully occupied with CNC and VMC machines.
Since the main body is one peace duplex stainless steel forged body,
we can manufacture these valves according to following technical specifications
ASTM A182 F51 Duplex Steel Ball, Needle, Ball DBB Valves
ASTM A182 F53 Duplex Steel Ball, Needle, Ball DBB Valves
ASTM A182 F55 Duplex Steel Ball, Needle, Ball DBB Valves
Instrumentations Duplex Steel DBB Valves For Chemical Injection & Sampling -
Duplex Steel DBB valves for chemical injection & sampling require an additional straight tubing onto the bore of the valve inlet flange face. This quill enters into the process flow and chemicals can be introduced through the DBB valve. Incorporated in the DSS DBB valve design an additional check valve is required for this application in order to prevent reverse flow and process fluid contaminating the chemical source.
Chemical Injection Valve
Applications of Duplex Steel Double Block and Bleed Valves
- Block and Bleed.
- Double Block and Bleed.
- Pressure Measurement.
- Chemical Injection.
- Level Measurement.
- Flow Measurement.
Duplex Steel Double Block and Bleed Valves Technical specifications and Features
Technical specifications and Features of Duplex Stainless Steel Double Block and Bleed Valves manufactured by us are as following :
ANSI B16.5 flanged Intel connections 1/2" to 8" NB sizes.
Pressure Class 150 rated to Class 2500 rated.
API flanged Inlet connections sizes to 2 1/16"
1/2" NPT threaded female outlet to ANSI/ASME B1.20.1.
1/2" NPT threaded female vent connection to ANSI/ASME B1.20.1.
Material thickness to ANSI B16.34.
Boiled Body construction (Intel or Outlet) is options.
Fire safe to API 607, BS6755 Part 2.
We are manufacturing these duplex steel double block and bleed valves with best quality raw materials and from reliable source only to make sure the best quality final valves and that is the reason why our DSS DBB valves are acceptable to all ndustrial sectors.
Duplex Stainless Steel Double Block and Bleed Valves Grade Options
- ASTM A182 F51 Duplex Stainless Steel Double Block and Bleed Valves
- ASTM A182 F53Duplex Stainless Steel Double Block and Bleed Valves
- UNS 31803 Duplex Stainless Steel Double Block and Bleed Valves
- UNS 2205 Duplex Stainless Steel Double Block and Bleed Valves
- 1.4462 Duplex Stainless Steel Double Block and Bleed Valves
Duplex Stainless Steel Double Block and Bleed Valves Design Standards and Specifications
As per API 6D or ISO 14313:1999
Duplex Stainless Steel Flanged Double Block and Bleed Valves Face to Face Standard
As per ASME B 16.10
Duplex Stainless Steel Double Block and Bleed Valves Testing Standards
API Standard 594 covers Flanged, Lug, Wafer and
Butt-welding design Double Block and Bleed Valves material, face-to-face dimensions,
pressure-temperature ratings, and examination, inspection, and test
requirements of Double Block and Bleed Valves.
Duplex Stainless Steel Double Block and Bleed Valves Inspection Standard
As per API 598 or or BS 6755 Part-1. The standard covers inspection, supplementary examination, and pressure test requirements for both resilient-seated and metal-to-metal seated Double Block and Bleed Valves. Pertains to inspection by the purchaser and to any supplementary examinations the purchaser may require at the valve manufacturer's plant.
Duplex Stainless Steel Double Block and Bleed Valves Inspection Check Points
All our Duplex Stainless Steel Double Block and Bleed Valves are 100% carefully inspected through series of dedicate testing procedures, including:
- Material verification of Duplex Stainless Steel Double Block and Bleed Valves
- Dimension check such as tolerance, lobing, out-of-roundness.
- Final Mechanical Properties of Duplex Stainless Steel Double Block and Bleed Valves.
- Overall quality inspection (Includes eddy current (non-destructive) electric testing.)
Duplex Stainless Steel Double Block and Bleed Valves Seat Materials Options
- Virgin PTFE
Duplex Stainless Steel Double Block and Bleed Valves Marking and Identifications
Each Duplex Stainless Steel Double Block and Bleed Valve is identified on proper name plate and on valve body as stated by MSS-SP 25, ASME B16.34 Name plate carries all information on rating, size, valve body and trim material, customer tags.
Marking includes material designations (as per ASTM standard) and heat code and our company trade mark.
Duplex Stainless Steel Double Block and Bleed Valves Applications
- Desalination process Application
- Marine Application
- Seawater Application
- Power plants
- Oil and Gas Industries
- Petroleum Refineries and Petrochemicals
- Chemical Industries.
- Marine and Ship Building Industries
- Offshore Industries
- Oil well industry
Duplex Stainless Steel Double Block and Bleed Valves Packagings
All finished Duplex Stainless Steel Double Block and Bleed Valves are packed to suit the special conditions for international deliveries and can also customized as per customer's specific requirements.
Duplex Stainless Steel Double Block and Bleed Valves Documents
Our Duplex Stainless Steel Double Block and Bleed Valves products are accompanied by certified material test report 3.1 as per DIN EN 10204 / ASTM A1016. Pre material certification can be provided upon request.
We can provide our quality Duplex Stainless Steel Double Block and Bleed Valves with any world know third party inspection Certifications as following to make ensure the best quality
Our Quality Duplex Stainless Steel Double Block and Bleed Valves are manufactured with strict quality control system and that is why it is widely acceptable across all industrial sectors.
Oil & Gas
Pipe Line Projects
Countries where Neev Valves can supply duplex steel double block and bleed valves
Neev Valves Welcomes Distributors for duplex steel double block and bleed valves