How to operate the pressure test & leakage test for Safety Valve?
The test stands are designed to carry out hydrostatic/proof pressure test and air/gas pressure testing of various types and sizes of safety valves, such as seat tightness, set pressure, leakage testing and etc.
But how to operate the pressure test & leakage test for Safety Valve? We believe most people are doubts and interested in that.Now let us take a look below.
Please set the equipment on dedicated workshop or test room, and make sure the proper workshop air supply, gas supply, water/oil supply, power supply and necessary handling tools are provided. Meanwhile, at least 0.6m space shall be provided around the testing machines.
PS: The equipment should be installed indoor environment, and the dust, direct strong sun-light shall be avoided if possible.
Preparations before Test
(1) Close all the valves on the control panel, and keep the drive air at 0;
(2) Connect the workshop air, gas supply and power supply of test system, and open the air and gas supply; (Note: the workshop air shall be no more than 10bar.);
(3) Get ready for the specimen;
(4) Check the workshop air and gas supply pipelines, and Make sure all pressure pipelines have been well connected;
(5) Make sure the sockets, cables are properly connected, and turn on the power, and then open the test software;
(6) Make sure the N2 gas supply is enough and well connected to gas booster system;
(7) Turn on the power supply and Logon the testing software, and turn on the lights;
Operation methods: Clamping→Start Software→Select test type→set test parameter→Auto Running→Test Finish.
Operating steps of Hydraulic Clamping System | |||
NO. | ITEM | Operating steps | |
1 | Preparation | - Prepare test PSV Prepare matched sealing plate, support ring, or thread fitting | |
2 | Clamping PSV
| - Press on ‘Hydraulic motor pump power on/off’ - Choose proper clamping pressure as per ‘PSV setting pressure-hydraulic clamping pressure sheet’ attached in the panel left side. - Operate rotary button to shrink/ expand, clamp/loosen. Notes: Above operation is for flange type PSV only; threading type PSV can be installed in the clamping system directly with suitable fitting. Pls check ‘‘PSV setting pressure-hydraulic clamping pressure sheet’ before clamping. Motor pump will be used for clamping pressure ≤40bar, additional air driven liquid pump will be used for clamping pressure ＞40bar (operate regulator ‘hydraulic pump drive air’ to adjust the output pressure).
| |
3 | Connect rubber plug | - Select proper flange as per PSV outlet size - Connect to bubble counter via air hose | |
4 | Close the door and locked | - Close the door | |
5 | Camping finish | - | |
Operating steps of Gas test | ||
NO. | ITEM | Operating steps |
1 | Preparation | - Check instrument air and nitrogen gas pressure through related pressure gauge. - Run test software
Notes: if the test software can’t be communicated, pls check: 1. Check if cable was connected correctly. 2. Set the IP-4 address to 192.168.2.10 |
2 | Confirm system status | - Open ‘3# pressure gauge isolation valve’ - Close ‘Gas test pressure supply valve’ - Close ‘Test pressure relief valve’ |
3 | Setting PSV pressure parameter and information | - Input and save PSV information in SOFTWARE. - Press ‘Start’ button in either software |
4 | PSV setting pressure test | - Slowly open ‘test pressure supply valve’ to adjust the test pressure - Observe the 1# test pressure gauge or digital indicator. - After PSV open, close ‘test pressure supply valve’, open ‘test pressure relief valve’ - Software automatic record test pressure curve - Test finish, software auto save test data. |
5 | Leakage test | - Slowly open ‘test pressure supply valve’ to adjust the test pressure to 90% of PSV setting pressure - Observe the 1# test pressure gauge or digital indicator. |
6 | Record bubble quantity | - Close ‘test pressure supply valve’ when test pressure reach to 90% of PSV setting pressure. - Press ‘Bubble counter timing’ to record the bubble quantity. |
7 | Test Report | - Press ‘Report’ - Select ‘Date’ - Select ‘Search’ - Export to Excel report & Print |
Operating steps of Water test | ||
NO. | ITEM | Operating steps |
1 | Preparation | - Check instrument air and nitrogen gas pressure through related pressure gauge. - Run test software
Note: if the test software can’t be communicated, pls check: 1. Check if cable was connected correctly. 2. Set the IP-4 address to 192.168.2.10 |
2 | Confirm system status | - Open ‘3# pressure gauge isolation valve’ - Close ‘Gas test pressure supply valve’ - Close ‘Test pressure relief valve’ |
3 | Setting PSV pressure parameter and information | - Input and save PSV information in SOFTWARE. - Press ‘Start’ button in either software |
4 | Setting pressure test | - Software auto test as per setting - Test finish, software auto save test data. |
5 | Leakage test | - Software auto test as per setting - Test finish, software auto save test data. |
6 | Test Report | - Press ‘Report’ - Select ‘Date’ - Select ‘Search’ - Export to Excel report & Print |
Any questions and in case of requirement please do not hesitate to contact us www.ivsna.com.
Thank you for precious time of reading.
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