Double Block & Bleed Archives

Torque is more than meets the eye

DBB - Valve torque requirements for a safe process application.

When considering the torque values to operate the valve, one must consider how much torque is required to fully open and fully close the valve. If the valve gets stuck in mid function of opening or closing the valve a safety factor must also be considered sizing the actuator.

The Paradoxon of Dual Certified Material 316 / 316L

DBB - Paradoxon of dual certified material 316 and 316L.

When I started my career as a valve engineer, one of the first lessons were: Which materials are used for valve components. Didn`t know too much about the details of the different materials, for me, the most strange material at that times was the 316 Series.

1.4401 1.4404 316 316H 316L ASME B16.34 ASTM A182 ASTM A479 carbon carbon content DBB DBB Ball DBB Valve Double Block & Bleed Double Block and Bleed dual certified flanged Industrial Valves material Taurus threaded Valves welding end

Compact DDB Valves for Modular Plant Systems

DBB - Manufactoring compact valves for oil and gas industry.

Construction of modularized plant system has become a popular choice of design in heavy process industries like the Oil/Gas and Petrochemical Sector. Modularization is where equipment, vessels, piping, valves, instrumentation and electrical/controls are mounted on a compact steel framework, commonly called “skids”.

chemicalinjectionskid Construction DBB DBB Valve dehydrationpackage Double Block & Bleed Double Block and Bleed Dual Ball DualBallDBB Filtration fix-installedplant Gasregeneration Gastreatment highquality Industrial Valves instrumentation less-weight ModularPlantSystem Pipeline Valves piping pipingcomponents Safety skids space-saving sweetening Taurus Taurus-DBB Valve Valve Sector Valves vessels

Importance of design flexibility for complex requirements

DBB - Valve manufactoring according to customer specifications.

Valve customization is adapting to customers’ needs in regards to changing body materials, port connections, testing requirements, and various combinations of different assembly types. Being open to different design ideas, and accepting the challenge the customer set forth. As a valve manufacturer we strive to impress our customers with our many years of experience in building valves. Every day we continue to receive new design request from our customers for complex requirements. Since we have over 140 years in customizing valves experience, our customer can trust that we are experts in the industry.

American Society of Mechanical Engineers B31 Building Services Piping customization DBB DBB Valve Double Block & Bleed Double Block and Bleed Fuel Gas Piping Heat Transfer Components Industrial Valves Liquid Hydrocarbons MAOP Oil & Gas Oil and Gas Pipeline Transportation Systems Pipeline Valves Power Piping Pressure Process Piping Refrigeration Piping Standard Taurus Taurus-DBB temperature valvecustomization

Single Ball DBB vs. Dual Ball DBB

DBB - Difference between dual ball DBB and single ball DBB.

Very often our sales people are being asked why to use a DBB Dual Ball Design and not just a Single Ball Design. A Single Ball Design would be much cheaper.

Well, the answer is very simple: Safety and Process Reliability.

Here is a simple infographic to explain the benefit of the Dual Ball Design.

Better Solution DBB Double Block & Bleed Double Safety Dual Ball Safety Single Ball

“Fire Safe Approved” vs. “Fire Safe by Design”

DBB – Difference between fire safe approved and fire safe by design.

During the last years I recognized, that people sometimes talk about “Fire Safe by Design“. When I was coming across this the first time, I wondered about the meaning of this in detail – Just using metal to metal sealing, graphite sealing or graphite packing?

“Fire safe by Design” is widely used, but to my knowledge there is no common or firm description or rules limiting or qualifying the use of this concept.

API 607 API 6D API 6FA DBB Double Block & Bleed Fire Safe Fire Safe by Design Industrial Valves ISO 10497 Pipeline Valves Taurus-DBB Valves