Friday, 29 July 2016

Deluge Valve working principle and application in fire protection

Deluge Valve working principle and application in fire protection

Deluge Valves

Deluge Valves are used in conditions that call for quick application of large volumes of water and, for that reason, are often integral components in fire protection systems. In this article, PIF explain how deluge valves work, what their advantages and disadvantages are, and where you can lay your hands on one.

What are Deluge Valves?

Deluge systems deliver large quantities of water, over a large area, in a relatively short period of time. They are commonly used in fixed fire protection systems whose pipe system is empty until the deluge valve distributes pressurised water from open nozzles or sprinklers.

Deluge systems contain more components and equipment than wet pipe and dry systems. So for that matter they are more complex. Detection systems can include heat, smoke, ultraviolet (UV), or infrared (IR).

Applications for Deluge Valves

Deluge systems are used in conditions that require quick application of large volumes of water. They create a ‘buffer zone’ in hazardous areas or in areas where fires can spread rapidly. They can also be used to cool surfaces to prevent deformation or structural collapse. Or to protect tanks, transformers, or process lines from explosion.

Other examples include: tanks containing combustible solutions; equipment pits; storage or process areas containing substances with a low flash point; or product handling systems.
Key Manufacturers of Deluge Valves

Viking are a popular manufacturer of Deluge Valves. Watch this video explaining their Electrically Operated Deluge System.

TYCO are also market leaders in Deluge Valves and systems, this video demonstrates their Model DV-5 Deluge Valve Wet Pilot Actuation system.

The Inbal Deluge Valve is FM and VDS approved to 300 psi (21 bar) in sizes 3″, 4″, 6″, and 8″ (80, 100, 150, and 200 mm). It is compact, lightweight, and comes provided with a preassembled trim – all of which simplifies and speeds up installation. The Inbal Valve opens quickly, yet smoothly, preventing water hammer and is designed to prevent false tripping. Plus, it can be reset by a thumb-activated knob.

Cla-Val Hydraulic and Electronic Deluge Valves offer superior performance and durability in the most critical of fire protection applications. The electric/solenoid-operated Series 134 is an on-off valve that automatically opens upon receiving an electrical signal, to the solenoid pilot control, to rapidly fill fire protection piping. They are available in a wide range of materials that are poured in Cla-Val’s own onsite foundries for quick delivery.
Advantages and disadvantages of Deluge Valves

Less expensive than other methods,
Uses water for extinguishing.

Can damage sensitive or electronic equipment,
Longer clean-up time than powder and gas systems,
Requires a large water reservoir to operate.


Wednesday, 27 July 2016

Instrumentation Engineer jobs for 1-5 years experience in Mumbai

Instrumentation Engineer - (IND00007Z)


Jacobs Engineering Group Inc. is one of the world's leading providers of engineering and construction services, including specialty consulting. We provide services to companies and organizations, in industrial, commercial domain and serve private and public sector clients and government clients across multiple sectors and geographies. We provide a complete spectrum of engineering services, procurement and construction management to process and infrastructure industry. We have a pan-India presence, with four world-class engineering delivery centers in Mumbai, and one each in Delhi, Baroda and Kolkata

Position Summary


Supervise to see that Instrumentation contractor is executing the installation and testing activities as per the drawings, specifications and relevant codes/standards.
Study the drawings issued for construction in detail well in advance and identify if there is any mismatch between drawings and specifications / BOQ description / existing details drawings as well as any missing details and raise RFI to Project to get required details in time.
Review and approve the quality plan, Inspection & Test plan submitted by contractors and ensure contactor is executing the work and meeting the approved plans and procedures.
Witness tests carried out by Contractor and maintain records.
Actively participate in successful implementation of safety program as per contractual requirement.
Maintain joint record / document for the deviations from the drawings, specification, standards or dismantling quantities etc.
Verification and certification of quantities of RA Bills / Final bills submitted by the contractor.
Working out of quantities from the drawings.
Review and monitor the adequacy of the manpower and other resources deployed by the contractor for the execution of works as per the approved schedules and monitor the site activities as per approved schedule..
Graduate or Diploma Engineer in Instrumentation Engineering
Experience of working in projects in Oil Refineries / Petrochemical / Chemical / Pharmaceutical / FMCG / Buildings sector in instrumentation works.
Through understanding and knowledge of quality systems / procedures and HSE systems/procedures to be followed for instrumentation works.
Candidates from Consultancy background would be preferred. Alternatively experience with large EPC contractors.
Must be good in written and verbal communication.

Engineering Degree / Diploma in Electrical/ Power Engineering with 1 to 5 years working experience with reputed consultant / EPC contractor.
Working experience in execution of Electrical works for Chemical, Petro chemical, Refinery, food and pharma sectors.
Good written and verbal communication skills.
Good knowledge on IS, IEEE code requirement as well as standard Electrical engineering practices.

At Jacobs, we help prepare people for new opportunities and challenges. With positions at every level, openings in multiple disciplines, expertise in a range of markets and offices around the globe, we create an environment where you can learn, grow, and thrive. From our competitive benefits program to our Health and Safety initiative of Beyond Zero workplace injuries, we believe that you'll find a flourishing career here at Jacobs

Primary Location: India-India Countrywide-Belapur

Travel: Yes, 10 % of the Time

Job Posting: Jul 18, 2016, 9:00:57 AM

About Jacobs
At approximately $13 Billion in revenues, Jacobs is one of the world's largest and most diverse providers of technical, professional, and construction services, including all aspects of architecture, engineering and construction, operations and maintenance, as well as scientific and specialty consulting. We serve a broad range of companies and organizations, including industrial, commercial, and government clients across multiple markets and geographies. Our global network includes approximately 66,000 employees in more than 250 offices in more than 30 countries, with operations in North America, South America, Europe, the Middle East, India, Australia, Africa, and Asia.

Jobs for Experienced Instrumentation Engineers in Boeing India

Manufacturing Engineer

 Job ID 1600012755Date posted 07/23/2016
Location BangaloreKarnatakaIndia
Other Locations

Job Description

Job Description
The Boeing Center in India is looking for experienced Manufacturing Engineer to support a variety of aerospace programs. Specific responsibilities of this position include:
Develops and implements production and tooling methodologies. Participates on Engineering Program Capability Teams to integrate technical solutions across multiple disciplines. Develops, identifies and implements conceptual designs and maintains the program architecture for build. Leads and implements manufacturing plans.
Conducts producibility and variation analyses to ensure that manufacturing process capability matches requirements. Assists in providing producibility information for inclusion in project plans and helps document producibility best practices. Analyzes design/build concepts to evaluate producible design/build definitions. Resolves technical problems of significant impact to performance, cost or schedule.
Coordinates and implements new engineering principles, theories, advanced technologies and concepts. Validates and ensures production readiness of solutions to complex problems. Implements lean principles and technologies.
This position will work with cross-functional teams supporting work packages will support Boeing’s Defense and Commercial work on both fixed-wing and rotorcraft platforms Relevant experience associated to following technical competencies is highly desired:
General knowledge of aerospace assembly and production processes including manufacturing capabilities (structural) and data needed for defining configuration
Supply chain familiarity including industry processes, policies and procedures, products, requirements, capabilities, practices, support resources, preferences, constraints, etc.
Broad knowledge of producibility and process improvement methodologies (e.g., statistical process control, hardware variability control, Six Sigma). Able to assist in creating process improvement and testing methodology
General knowledge and ability in examining operations and procedures, formulating policies, and developing and implementing lean strategies and procedures.
Experience and knowledge of manufacturing, methods, fabrication processes (e.g., forming, stamping, machining, heat treatment, machines/machine tools, cutting tools and fluids, instrumentation, data acquisition and control systems)
Experience creating and maintaining product structure, bill of materials, and assembly work instructions
Develops and maintains technical relationships / partnerships with customers, suppliers, peers, partners and team members to develop collaborative plans and execute on projects.
Provide technical oversight of junior employees and suppliers, and lead process improvements. Motivates, develop and mentor junior employees to achieve excellent technical and business outcomes.
Provides periodic updates to Boeing management in the form of progress reports, project summaries, and other related documents. Coordinate and communicate regularly with experts in Boeing organizations around the world. Support initiatives on engineering excellence, employee development, mentoring, and customer engagement
This position will require some travel within India and internationally.
Skill Required
Must have experience working with cross-functional teams spread across multiple products and locations within Boeing and external partners.
Must be flexible, with a high tolerance for organizational complexity and ability to work with partners from within Boeing and outside, across different cultures and time-zones.
Communication – strong written and verbal communication skills, ability to prepare comprehensive reports, proposals, Statements of Work, and connect technology to business considerations (e.g., ROI). Candidate must be fluent in English, and familiar with MS Office tools.
Candidate should be conversant with Assembly Processes, Customer Supplier Knowledge, Design / Produce Processes, Engineering Process Improvement Method, Manufacturing Methods, Product Structure, Operational Analysis.
Candidate must be a self-starter with a positive attitude, high ethics, and a track record of working successfully under pressure in a time-constrained environment.

Engineering Core
Relocation Assistance Available
Yes. Available for eligible candidates, if authorized.

Degree and typical experience in engineering classification: Bachelor's and 5 or more years' experience, Master's degree with 3 or more years' experience or PhD degree with experience. Bachelor, Master or Doctorate of Science degree from an accredited course of study, in engineering, computer science, mathematics, physics or chemistry. ABET is the preferred, although not required, accreditation standard.
Must be very fluent in spoken and written English, and have excellent communication style.
This requisition is for an international, locally hired position. Candidates must be legally authorized to work in India. Boeing will not seek immigration and labor sponsorship for any applicants; this is the responsibility of the job candidate. Benefits and pay are determined at the local level and are not part of Boeing U.S.-based payroll. RELOCATION BENEFITS IF INDICATED ARE LIMITED TO IN-COUNTRY MOVES AND ARE NOT AVAILABLE FOR OVERSEAS RELOCATION. THERE IS NO EXPATRIATE PACKAGE ASSOCIATED WITH THIS POSITION.

Experience Level
Individual Contributor
Job Type
Yes, 25 % of the Time
US Person Status Required

Contingent Upon Program Award
Job Code

Tuesday, 19 July 2016

Disadvantages of Coal Boilers with some advantage

Non-renewable fuels are indeed the top fuels used around the globe for creating power and electricity. Among the non-renewable fuels, coal is the most widely used gasoline in power plants. Fossil fuel fired power plants furnace use different varieties of machinery that convert warmth energy produced from combustable into mechanical energy.

Fossil fuel, gas, and oil are the non-renewable fuels in charge of almost all of the world's electricity and energy demands. Fossil fuel, which is easily available in almost all of the developing and developed world, has recently been used as an important source of fuel even in ancient human civilizations. In addition, it found its use in historic steam engines at the dawn of the professional revolution.

Advantages of Coal as Power Vegetable Fuel

Today, advances in technology have allowed fossil fuel to improve living conditions using its current role in meeting man's fuel needs. Coal has been used extensively in power era where better technology is employed to ensure that there is a balance between ecology and economics in producing sustainable and affordable energy. But, is coal the answer to affordable and sustainable energy? To find answers just for this question, it is best to learn about the advantages- and disadvantages- of coal fired plants. Several of its advantages include reliability, affordability, abundance, known technologies, safety, and efficiency.

1. Reliability. One of the greatest features of fossil fuel fired power plants central heating boiler is reliability. Coal's potential to provide power during maximum power demand either as base power or as off-peak power is greatly valued as an electric power plant fuel. It is with this reality advanced pulverized coal fired electricity plants are designed to support the grid system while we are staying away from blackouts.

2. Affordability. Strength produced from coal dismissed plants is cheaper and more affordable than any other energy sources. Seeing that coal is abundant, it is obviously cheap to produce power using this gas. Moreover, it is not expensive to extract and mine from coal build up. Consequently, its price remains low in comparison to other gas and powers.

3. Plethora. There are approximately over 300 years of monetary coal deposits still accessible. With this great amount of coal available for use, coal fired plant life can be consistently motivated in a long time to come.

4. Known technologies. The production and use of coal as a gasoline are well understood, and the technology required in producing it is constantly advancing. Moreover, coal-mining techniques are continually increased to ensure that there is a frequent supply of fossil fuel for the production of power and energy.

5. Safety. Generally, coal terminated plants are considered more secure than nuclear power plant life. A coal power plant's failure is unquestionably not likely to cause catastrophic situations such as an indivisible meltdown would. Additionally, the welfare and productivity of coal industry employees has greatly improved over the years. In fact, accidents, time lost, and deaths have decreased significantly in past times years.

Disadvantages of Coal-Fired Power Plants

On the other hand, you can also get some significant disadvantages of fossil fuel fired plants including Green house Gas (GHG) Emissions, exploration destruction, generation of large numbers of tons of waste material, and emission of damaging substances.

1. Greenhouse gas emissions. It cannot be denied that coal leaves behind harmful byproducts after combustion. These byproducts cause a lot of polluting of the environment and contribute to global warming. The increased and also carbon emissions as a result of coal terminated plants has resulted in further global warming which results in climate changes.

2. Mining destruction. Exploration of coal not only results in the break down of habitat and landscapes, but it also displaces humans as well. In many countries where fossil fuel is actively mined, so many people are out of place in huge numbers anticipated to the pitting of the planet earth brought about by underground mining. Places around coal mines are risky for human habitation as the land could give in at anytime.

3. Generation of millions of a great deal of waste. Millions of tons of waste materials which can no much longer be reused are made from coal fired crops. Aside from the fact these waste products make contributions to garbage disposal problems, these also contain dangerous substances.

4. Emission of harmful substances. Thermal plant life like coal fired vegetation emit harmful substances to the environment. These include mercury, sulfur dioxide, and also carbon monoxide, mercury, selenium, and arsenic. These harmful chemicals not only cause chemical p rain but also are incredibly harmful to humans as well.

Despited the disadvantage, coal fired engine electricity boiler is still important for the ability generation, the traditional fuel combustion technology will be improved with an improved performance to cope with the contradiction between industry development and environment.

Wednesday, 6 July 2016

LVDT: Basic Principle, Theory, Working, Explanation & Diagram | Linear Variable Differential Transformer

LVDT: Basic Principle, Theory, Working, Explanation & Diagram | Linear Variable Differential Transformer

A very basic transducer which is always useful in the field of instrumentation, I have studied about this in my college days. Now let me explain about the LVDT with its Principle of Operation and I will explain how it is constructed for its well known operation and you can understand the working of LVDT.

Principle of LVDT:
LVDT works under the principle of mutual induction, and the displacement which is a non-electrical energy is converted into an electrical energy. And the way how the energy is getting converted is described in working of LVDT in a detailed manner.
LVDT consists of a cylindrical former where it is surrounded by one primary winding in the centre of the former and the two secondary windings at the sides. The number of turns in both the secondary windings are equal, but they are opposite to each other, i.e., if the left secondary windings is in the clockwise direction, the right secondary windings will be in the anti-clockwise direction, hence the net output voltages will be the difference in voltages between the two secondary coil. The two secondary coil is represented as S1 and S2. Esteem iron core is placed in the centre of the cylindrical former which can move in to and fro motion as shown in the figure. The AC excitation voltage is 5 to 12V and the operating frequency is given by 50 to 400 HZ.

Working of LVDT:

Let’s study the working of LVDT by splitting the cases into 3 based on the iron core position inside the insulated former.

Case 1:On applying an external force which is the displacement, if the core reminds in the null position itself without providing any movement then the voltage induced in both the secondary windings are equal which results in net output is equal to zero
i.e., Esec1-Esec2=0

Case 2:When an external force is appilied and if the steel iron core tends to move in the left hand side direction then the emf voltage induced in the secondary coil is greater when compared to the emf induced in the secondary coil 2.
Therefore the net output will be Esec1-Esec2

Case 3:When an external force is applied and if the steel iron core moves in the right hand side direction then the emf induced in the secondary coil 2 is greater when compared to the emf voltage induced in the secondary coil 1. therefore the net output voltage will be Esec2-Esec1

Advantages of LVDT:

* Infinite resolution is present in LVDT* High output* LVDT gives High sensitivity* Very good linearity* Ruggedness* LVDT Provides Less friction* Low hysteresis* LVDT gives Low power consumption.

Disadvantages of LVDT:

* Very high displacement is required for generating high voltages.* Shielding is required since it is sensitive to magnetic field.* The performance of the transducer gets affected by vibrations* Its is greatly affected by temperature changes.

Applications of LVDT:
=> LVDT is used to measure displacement ranging from fraction millimeter to centimeter.=> Acting as a secondary transducer, LVDT can be used as a device to measure force, weight and pressure, etc..

5 port solenoid valve with Animation


Fiber optics and an external solenoid valve optimize stroke timing and increase durability by shifting the pump quickly and efficiently.

The inlet air is supplied to the left and right using a 5 port solenoid valve and a PLC which controls the flow of signal to the PUMP

5 port solenoid in action

Supply Air      

Exhaust Air     

Ambient Air     

Liquid Suction     

Liquid Discharge