How do you test your safety relief valves?
CROSBY Electronic Safety Valve Testing by TRIVACO. Save time, cost, and leaks.
»Problem: How do you test your safety relief vavles?
»Solution: Crosby's automated AVK electronic valve tester!
»Author: Walt Deacon
Problem: How do you test your safety relief valves?
• Increase the pressure of the boiler until the valve opens?
• Raise the lifting lever? This method is hot and dangerous, and you get no information on the point of relief.
Both of these are problems since anytime the valve relieves, particles in the steam collect at the seating surfaces. Leaks, seat damage, and water in the vent pipe can result in expensive steam loss and valve damage.
The historical alternative has been to send the valves to a National Board qualified “VR” valve shop (like Crosby) for rebuilding, testing, and resetting the pressure. The results are positive, but annual* tests are required, and it's expensive to swap the valve every year.
Solution: Crosby's automated AVK electronic valve tester
Crosby's automated AVK electronic valve tester combines a computer with a hydraulic lifting device. The hydraulic lifting device will lift the valve stem until the computer determines the opening set point of the valve.
The advantages?
• First, the valve is tested with the AVK when at operating pressure. The boiler does not have to be taken off line.
• Second, the cost of testing six to eight valves in the field is only about the same as one valve in the shop.
• Third, since the AVK does not lift the valve all the way open, the steam cuts and leaks do not occur.
The AVK is accurate and is recognized by insurers as an alternative to sending the valve to Crosby's shop for testing. You get a printout, including a graph of each valve tested. This provides documentation for your quality/safety compliance program.
Simple, accurate, and less expensive.
Contact Walt Deacon > Why not give us a call to schedule your annual* test?
*testing interval is determined by your boiler insurer or State Boiler and Pressure Vessel Rules
Crosby / Anderson-Greenwood is part of Tyco, the world's largest producer of safety relief valves. Relief Valve Service is done by the Midwest SSD office, Bolingbrook, IL, which is an ASME Section I and VIII National Board Authorized Repair and Field Service Assembler of Safety Relief Valves. TRIVACO –TriState Valves and Controls, is the Authorized Distributor for Crosby and Anderson-Greenwood Safety Relief Valves in Indiana, Kentucky and Ohio.
