boiler safety valve testing price
Tired of keeping track of your valve inventory’s annual certification records? We offer complete management of your safety relief valves. With an inventory of repair parts and in stock relief valves of all sizes, we can respond to any customer emergency. We offer annual certification services as well as repair of all major brands, including Kunkle, Conbraco, Consolidated, Dresser, Apollo and more.
LegaTest on-line testing for safety valves system is designed and integrated with proven software and the highest specification of equipment to guarantee equipment integrity and ensuring compliance with statutory requirements.
Legatest opens the valve slightly by pulling the spindle. Force, pressure, lift and sound sensors are sending signals to electronic data acquisition control unit and PC. LCD is showing 4 curves:
This service was developed to help customers avoid loss of productivity and improve operational uptime. Data acquisition software allows the system to keep full records of all your safety valves. Test results are stored on the database for future maintenance requirements. Full test results and certification are presented to comply with your statutory requirements and support further diagnostics as required.
"We are offering our service online safety valve testing in Qatar, Saudi Arabia, Bahrain, United Arab Emirates, Oman, Kuwait, Asia, Europe and all middle east countries".
On-line welded safety valves can be tested in the In-Situ position without cutting,Welding,Removing and Outage of the plant,which give considerable at time saving and cost saving to the customer enormously.
Safety valve can be tested when plant/boiler is in operating condition (Hot test) without increasing the pressure of the boiler also the valve can be tested in during shutdown (Cold test) on both condition that test can be performed.
Around ₹50,000 to ₹75,000 per safety valve cost saving will be effected to the customer in comparision with conventional test methods and other test. The cost saving is benficial to the customer in our lega test(Advanced LegaTest)Online safety valve testing system
Get a range of wholesale safety relief valve test bench designed for different testing needs. For those involved in the field of digital electronics and who need to work with digital circuits and systems regularly, consider the wide range of logic analyzers that are available. Quality testing equipment will be able to help verify and debug your digital designs efficiently when required.
For owners of electronic tools and equipment supply stores, there is also a large variety of testing equipment that you might want to consider purchasing. Products that are available include vector network analyzers, circuit breaker testers, megohmmeters and even tube testers. Get safety relief valve test bench from several popular and leading brands here.
The CALDER PROSET Pilot Valve Tester is a cost-effective way to perform the functionality of the pilot in Pressure Operated Relief Valves (PORV) with unsurpassed quality and ease of use. ROBUST, EASY TO USE, AND STATE OF THE ART Tests both modulating and snap-acting pilot...
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CLIMAX | CALDER invites you to visit us at the Valve World Americas Expo & Conference on October 13 – 14, 2021, at the George R Brown Convention Center in Houston, Texas, booth 1521. Valve World Americas Expo & Conference is the largest exhibition for services, equipment, and other valve needs. CLIMAX, the leading...
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CALDER Advanced Valve Repair & Testing Systems cordially invites you to the GRAND OPENING of our new CALDER Saudi Arabia sales office, customer service center and product showroom in Dammam, Saudi Arabia. Please stop by on Monday, November 19 any time between 10:30 AM and 2:00...
Clark Turner has been in the valve industry for more than 35 years, where he’s done everything including repairing, hydrotesting, and installing line valves, as well as installing safety and relief valves in various processes. He also spent significant time as an ASME Section VIII design...
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For many years, ultrasound has been utilised by various vendors as an additional method to find the set point in cases the standard diagrams are hard to analyse. This can be the case when testing safety valves on liquid services.
Within an extensive benchmark test, METRUS in co operation with Sweden‘s biggest nuclear power station Ringhals AB investigated the approach to use ultrasound as an additional indication for the set point on liquid service safety valves. The result of 55 tests on different valves is that the „Ultrasound point“ is completely depending on the seat condition. This result perfectly first the fact that ultrasound will detect the start to leak point and not the set point (start to lift point).
Only on a new or freshly serviced valve, the set point will be close to the ultrasound point. Even tiniest soiling or improper maintenance will cause the ultrasound to severely „drift away“ from the true set point. Within a typical online safety valve testing scenario where a valve has not bee serviced for a year or more, it is not at all recommended to use ultrasound to identify the set point.
There are still two useful applications for ultrasound within online safety valve testing. A very simple but effective use is to compare the sound level of the valve before and after the test. Comparing those sound levels will indicate if after the test (disk lift) the valve is left in a similar condition to its previous untested state. This could be first information if the valve did properly reseat and seal after it has been lifted. White Paper – Online safety valve testing METRUS Valve Test Bench Exellence
Knowing why safety valves should be tested online and how this is done in theory, it is most helpful to get an idea of the every day questions you will have to deal with. It will enable you to imagine how online safety valve testing appears in real life.
Plant operators are often surprised when being asked by online testing engineers whether it is a problem to open a valve. Considering the definition of the set point to be the initial moment when the disk starts to lift the safety valve disk must lift to find that point in a test diagram. It very much depends on the test equipment how long and high the valve will open, but it definitely has to open. geöffnet wird.
To test a safety valve, it must be possible to lift the disk and measure the force when doing so. If a safety valve has a spindle, it is possible in 95% of all cases to test it online. Some valves might require a simple spindle modification. This depends on the valve and the adapter solution how to „connect“ the test rig. Valves that do not have a spindle at all can not be tested.
Valves installed on extremely dirty fluids like bituminous crude oil should not be tested unless they are equipped with a rupture disk to keep the seat clean. Dirt could prevent the disk from sealing properly and the valve will remain leaking after the test. It the maintenance departments decision whether to agree with slightly lifting a valve or not.
Safety valves installed in EEx areas require special equipment to operate the test rig. If such equipment is available, it is important to check the specific EEx certificate for the approved EEx class and EEx area. As of now and to our best knowledge, there is no online safety valve testing system available that has an EEx approval for the whole machine. The test rigs are approved but the power unit usually has to stay outside the EEx area or have to be protected with special temporary solutions.
A frequent question to be found in industry is „what is the highest set point and the largest nominal diameter you can test?“. According to the online testing formula of fig. 1 the set pressure is calculated from line pressure, seat area and test force. Those parameters interact. The more line pressure is to be found under the safety vales disk the less force is required to lift (test) it. A final statement can never be made as it depends on seat area, set point and line pressure, whether or not the force capacity of specific equipment will be strong enough to test a valve.
Some suppliers claim that their equipment can test „any“ safety valve. Technically speaking it means raising the line pressure will lead to a remaining test force small enough to be covered by the test equipments force capacity. As online safety valve testing should not affect the plant operation this statement is not very respectable. Usually the line pressure can not be changed significantly just to test a valve.
Thinking about the largest valves, small and medium valves are often forgotten. But those ½“ and 1“ valves built the majority of valves to be found in industry. It is a technical fact, that each measurement task requires suitable sensor ranges. Large valves require large forces and small valves usually small forces. The operational range of online safety valve test equipment is therefore not only defined by its strongest force capacity. It is a question how accurate it can deal with a variety of forces and pressures – small and large.
Online safety valve testing offers major cost saving potential. In most cases it is cheaper than workshop testing after comparing direct testing costs. This of course requires the test equipment to be efficient in handling and operation.
Safety valves need to be tested at various locations within a plant. It is common to move the test equipment a few times during a test day. Different valve types to be tested require retooling of the test rig. In every day life the equipment will be packed and unpacked several times and it will require adaptation to fit the test rig on the safety valve. Valves will be located on top of tall reactors and on difficult to reach places under or behind pipelines.
The test equipments performance is significantly defined by its mechanical performance – weight and flexibility. The time for unpacking and rigging up as well as for wiring all sensors etc. determines, how fast the individual valve test will be. And in many cases the safety valve requires adjustment. Depending on how long it takes to take the rig off the safety valve, testing and re-testing will be fast and efficient or time consuming.
Within a typical online safety valve test scenario, a valve might need to be adjusted. To adjust a valve, it requires to remove the rig (RR) adjust the valve (VA) and reinstall (RI) the rig before you can carry out the next test to see, if the adjustment was successful. This is done usually two times until a satisfying set pressure is adjusted.
The relation between handling and testing time in average test equipment is about 1/5. It becomes obvious that total test time and efficiency are significantly depending on the test rig performance – weight, portability and speed of set up / dismantling.
It may happen that safety valves stay open after the test. To make sure that such event does not affect the plant operation, a concept to remotely close the safety valve, using the test rig is absolutely necessary for safe online safety valve testing.
Testing safety valves online is not at all dangerous as long as the procedure is done properly and the system performs as it should. But there are rare scenarios in which a plant disturbance could appear, especially if a safety valve stays open or gets damaged.
Online safety valve test equipment today is either manually or electronically controlled. Electronic systems support the test process and monitor test limits, taking a lot of responsibility from the technician. TESON® e.g. automatically drives the complete lifting process, monitoring all sensor signals for pre calculated test limits. But electronic systems are sensitive to power black outs as well as to software malfunctions. To deal professionally with those, the online safety valve testing system must have an extensive safety system to guarantee the safety valve will never be blocked open or damaged – whatever might happen.
Manually controlled system are not sensitive to power black outs or system failures. They leave the full control over the test process to the technician. It is up to the technician to control the lifting force and whether or not to overload a valve. Especially with manually controlled system experience plays an important role as the safety issue is basically the human factor. Despite that even manually driven system must have some safety features to respond to hardware or hydraulic malfunction.
Considering the number of parameters to be considered and monitored during an online safety valve test, digital systems are definitely superior as the chance of malfunction and power black outs is considerably small if the systems are well designed and extensively tested. Even after intensive training and years experience it is barely possible for a technician to compete with the reliability and response time of a digital system. Considering the background of online safety valve testing it is a derived requirement of the system to be safely and correctly operated with minimum skill and experience.
When thinking of a first time investment, it is very often the purchase price that plays an important role. But if you consider the cost saving potential of online safety valve testing or the profit you could make with a service, it becomes obvious that there is more to be considered to get a real view on the cost of ownership.
Support from your supplier will be crucial for your business. If you are facing time sensitive testing sessions and your equipment gets damaged or you come across complex questions, delays of operations or loosing your customer to the competition can cause severe loss of profit. The system vendor should be able to minimize downtimes with an intelligent support strategy. This includes 24 h availability of technical support, access to most spare parts in local markets and availability of rental equipment to substitute yours during service and repair. The more a supplier is focused on the online safety valve testing business, the better resources he will offer to support your every day work.
Like all measuring equipment, online safety valve testing systems require calibration. Sensors and measuring electronic need calibration (typically every 2-3 years) to harmonize with ISO quality standards. Suppliers must be able to either offer you a calibration service or advice you where to get such service. To minimize transportation costs, the parts and modules that need calibration should be easy to isolate for shipping.
The variety of valves to be found in industry is huge. It is not at all practical to own every type of special equipment that might be required one day to test special applications. Your investment will be significantly lower if you can own core components that cover the majority of your every day online testing needs. Your supplier should offer you special extension for rent to cover the remaining applications once they are required.
We hope this white paper could draw a picture what online safety valve testing is about. If you have any further related question, please feel free to contact METRUS at any time. It will be our pleasure to support and consult you..
Pressure safety valves are designed to protect process piping and equipment in case of an overpressure event. TEAM Valve Solutions inspects, tests, repairs and re-certifies safety valves at 17 service centers across three continents, and in our fleet of mobile facilities, all of which are audited under the jurisdiction of relevant governing bodies.
Our solutions cover all major safety valve brands and support our customers through an inventory of spare parts and loose-assembled valves. In addition, our facilities are audited and governed by the National Board of Boiler and Pressure Vessel Inspectors. Testing, repair, and assembly are performed under license and guidelines of NBIC, and ASME Section I and VIII.
To ensure accurate in-line setpoint verification, TEAM Valve Solutions utilizes Trevitest, the pioneering system for validating safety valve performance in Conventional and Nuclear Power plants, as well as in other industrial process facilities.
Our repair service center is designed to keep your customer’s safety and relief valves at peak operating efficiency. And put extra profits in your pocket.
North American’s Service Center is equipped to handle any safety valve repair. NASVI has the specifications for nearly every safety valve ever made—allowing technicians to make repairs to exact specifications. The center has six lathes on site, so technicians can restore tolerances on existing parts in quick order. If a part cannot be restored, it can generally be replaced from our extensive parts inventory.
Once repairs are complete, valves are tested and then set at one of six, fully equipped test stations. The boiler is on every day for testing steam valves. It’s always ready, allowing us to set and ship your valves fast.
Over the years, our Service Center has proven popular with maintenance managers. It allows the plant to have their valves repaired, serviced and set quickly, which minimizes downtime. They also like the service because it saves them money.
Our repair service also includes updating the valve to the latest design standard when necessary. All valves serviced in our repair facility carry a one-year standard warranty. North American holds ASME’s V and UV stamps and National Board’s NB and VR stamps. The next time your customer has questions about repairing or upgrading their safety or relief valves, give one of our application engineers a call.
You don’t have to be an expert in the field of safety and relief valves to sell them. We are here to help. Our goal is to make it easy for you to profit from the sales of safety and relief valves. Our expertise comes from taking care of our customers for over 42 years. And our large inventory allows us to offer same day shipment from stock on every valve Kunkle makes.
The sole responsibility of our dedicated applications engineers is to take care of your requirements. We will help you with sales planning, product selection and after sale service when needed. We will even provide you with catalogs that have no reference to NASVI. Our valuable advice is free and as close as your phone. So the next time your customer calls and needs a safety or relief valve, call a NASVI Applications Engineer.
They’ll have a quick answer on price, availability and shipment. When it comes to selling safety valves, you don’t have to stock anything. Simply call 1-800-800-8882 or visit us on the web at www.nasvi.com. We’ll make it easy for you!
Our two-truck unit responds to customer requests anywhere, offering on-site repair and resetting of safety valves during scheduled maintenance shutdowns.
Step into the mobile repair unit and you’ll find all the equipment necessary to perform highest-caliber repairs: sand blaster, compressor, lathe, mill/drill press, lapping machine–-it’s all inside. There’s also a Consolidated® seat-resurfacing machine with all adapters for every orifice in the Maxi-Flow® boiler line. Completed valve work will carry the VR stamp.
The Field Service Unit also includes a state of-the-art computerized lift-assist testing unit that allows for testing set pressures and resetting high-pressure safety valves in the field. The testing unit makes testing valves that are welded in-line or stationary possible without removing the valves. Your customers won’t be required to pressure down or increase pressure to test for set pressure. The lift assist testing unit also allows for resetting valves after repairs have been made while the valves are on-line.
If you have prospects or customers that bought their replacement valves elsewhere because you haven’t been able to provide on-site service, you will want to get back with them and talk about this service. If you have questions about pricing and scheduling of our Field Service Unit, give us a call at (800) 800-8882.
With an ever-increasing focus on reducing maintenance expenditure, there is a need for safety critical equipment to function reliably. With preventative maintenance on pressure safety valves (PSVs) being one of the more significant integrity costs, increasing efficiencies in this area is important, with potential for time savings and performance improvement.
The Pressure Safety Valve Manager digital tool is client-accessible and contains all the information used in the RBI, including the (pre-pop) results. Detailed tabs contain the PSV performance history for the asset(s). The tool may also communicate with the operator’s computerized maintenance management system (CMMS) to accurately relay, not only the performance history of each PSV, but also information useful for maintenance planning, such as shutdown requirements, online testing capabilities etc.
IVI is a VR certified safety valve repair facility, approved by the National Board of Boiler and Pressure Vessel Inspectors as a VR certificate holder (stamp 179). We certify pressure relief valves in the shop and in the field for sections V and UV. We also perform on-site testing (while the plant operates) providing documented reports for all valves tested. We are also certified to administer special process conversions regarding machining, welding, heat treating, and N.D.T. (non-destructive testing) with our VR certificate.
With our VR stamp, we repair all types of pressure relief valves such as Consolidated, Crosby, Kunkle, Farris, Spence, Anderson Greenwood, and numerous other O.E.M. safety and pressure relief valves.
vpl has put you on the right track. The Trevitest Device is one brand of Lift Assist Device (others include KISS, EVT, PVT AVK, Hydroset, SPIVOT). SOme are manufactured by Pressure Relief Valve Companies, others by Valve Repair Shops and some are third party vendors with PRV background. A Pressure Relief Valve typically uses a spring (Force S) to hold a movable sealing member (disc) closed on a fixed sealing member (nozzle) until the system pressure (Force P) overcomes the Spring and opens the PRV to relieve an overpressure situation. The PRV works on the simple principle that IF Force S > Force P THEN the PRV remains closed (Static Force Balance Principle). However, IF Force P > Force S THEN the PRV is Open.
The problem is that most Steam Power Generating Stations, whether Fossil or Nuclear, are such high pressure and under so much demand for electricity that they do want to take the time or liability to overpressure their boilers to test Safety Valve Set Pressure. Use of the Lift Assist Device is permitted by ASME Code (both Sec. I, Power Boilers, & Sec. VIII, Pressure Vessels) to determine the Set Pressure of a PRV (Safety, Safety-Relief or Relief Valve).
The Equipment Required is a Calibrated System Pressure Gauge, a Lift Assist Device with an adapter to connect to the PRV Stem, a Calibrated Load Cell to measure the Force Applied to the PRV Stem, a calculator or PC with a program to determine the Set Pressure from the input data and most importantly, a Valve Technician who knows PRV Terminology, and is familiar with the Test Equipment.
The National Board offers the Certificate of Authorization and VR Stamp for the repair of pressure relief valves. Requirements are included in the current mandatory edition of the National Board Inspection Code(NBIC), Part 4, and NB-514, Accreditation of VR Repair Organizations.
The National Board offers the Certificate of Authorization for use of the T/O mark which indicates accreditation as a pressure relief valve Testing Organization. The program includes provisions for minor adjustments to restore valve performance. Requirements are based upon the current mandatory edition of the National Board Inspection Code(NBIC), Part 2, Part 4, and NB-528, Accreditation of T/O Test Only Organizations.
The National Board supports members who request tests be conducted on pressure relief devices involved in boiler and pressure vessel accidents. This service is provided at no cost to the National Board member. Please contact Pressure Relief or Executive staff for more information.
Representatives from the National Board are assigned to visit company sites to select production sample valves for testing at National Board- and ASME- accepted labs.