Trevi test

How Does Trevitest Work

Here’s the basic principle, A force is applied to the valve spindle to overcome the spring tension of the valve. This is achieved using a hydraulic power pack linked to an electronic load transducer (Load Cell). A computer is then used to measure the force applied. By combining this data with information on the valve seat and line pressure of the valve it is possible to assess the set pressure.

Cost Effective Safety & Relief Valve Testing.

Hot testing of valves while operations continue. Cold Testing of valves on site and in the workshop. Trevitest will increase efficiency and save your organization money from day one.
In the past, valve testing revolved around, workshops and most importantly shutting down the line. The whole process was both time consuming and costly – but there is an alternative.
With Trevitest you can carry out accurate assessments of safety and relief valves in situ and under pressure – Hot Testing. There’s also the option of Cold Testing to assess the performance of new and existing valves.
Developed and patented world-wide by Furmanite, Trevitest is fast, safe and efficient. Operated in accordance with strict control procedures centred on ISO 9001, Trevitest can by used with most safety and relief valves manufactured for use in steam, air, gas process and water systems. These include conventional spring type valves, torsion bar valves.

Serving Energy Sector Thermal, hydro and nuclear power generation. Onshore/Offshore oil and gas production. Refineries and petrochemical plants. Fertilizer and Chemical plants.   Pharmaceutical Industry Food processing plants. Pulp and Paper plants. Hot Testing – Measured Under Preasure With Trevitest Hot Testing you get a date marked certified print out of valve set pressure and the line pressure at the valve. From this information the set pressure, spring adjustment rate and displacement lift of the valve can be determined. Trevitest also gives an indication of the effect of the nozzle ring, guide ring and reseat pressure. Major applications include: Steam Service Valves: Test  LP/HP valves of the drum safety and reheater valves at normal operating pressure without the need for increased boiler pressure. Clean Process Valves: Test all clean process safety and relief valves of almost all chemicals, oil and gases.  Nuclear Valves: Test safety valves on the secondary side, main steam safety valves and safety valves on the primary side plus CO2valves and pressuriser valves. The Advantages of Hot Testing No interruption to plant production during testing.   Diagnose safety and relief valves that require maintenance while the plant is running normally prior to scheduled shutdowns. Reduced time needed to commission the plant after shutdown. Reduced fuel costs with no need to raise system pressure. Only valve that require an overhaul need to be removed from the line. Welded in valves can be adjusted without costly removal form the line. Multiple test and resettings of valves within a short time scale. No need for temperature compensation to set pressure. Cold Testing – A Cool Assessment With Trevitest Cold Testing you can determine the set pressure, spring rate and valve displacement, Major applications include: Pre-commissioning safety and relief valves on new plant. Workshop testing following the conventional bench test to give the valve a “fingerprint”. This can be verified once the valve is on – site. Advantages of Cold Testing Eliminate the cost of the removing valves from their location prior to commissioning new plant. Only valves requiring overhaul are removed from the line – reducing plant downtime. Correct spline alignment of torsion bar safety valves saves unplanned shutdown.