Yesterday morning, a customer from Hangzhou inquired about purchasing a seismic pressure gauge produced by the company. We first confirmed the specific parameter requirements of the seismic pressure gauge that the customer needed, including dial diameter, range, installation method, material, and purchase quantity. The customer sent us the product specification sheet produced by the design institute according to our requirements. We reviewed the specification sheet and found that all the parameters we needed were available. At the same time, we also requested seismic grade requirements. The customer asked us to provide a detailed explanation of the seismic grade and testing process for the seismic pressure gauge. We explained it to the customer one by one, and the customer was very satisfied. Then, we arranged for the company's procurement personnel to contact us.

todaySeismic grade description and testing process method for seismic pressure gaugesLet me explain to everyone.

FirstlySeismic grade description and testing process method for seismic pressure gauges--Seismic grade description:

The ordinary type is V.H.3 (not filled with liquid inside the shell), and the seismic type is V.H.4 (filled with liquid inside the shell)

SecondlySeismic grade description and testing process method for seismic pressure gauges--Seismic testing process method:

1. Apply pressure to the seismic pressure gauge to 40% -50% of its maximum range, conduct an initial vibration response check, and observe the maximum deviation of the pointer from the point of vibration;

2. Pressurize the seismic pressure gauge to 40% -50% of the maximum range, perform durability vibration response inspection, fix the frequency, and observe the maximum deviation of the pointer from the point during vibration for 1 hour; After the vibration test is completed, leave it for 1 hour for routine item testing.

3. Seismic grade description and testing process method for seismic pressure gaugesManufacturing process flow card

Process flow: Material preparation → Stamping → Cold and hot processing → Welding → Surface treatment → Assembly → Pressure testing → Vacuum pumping → Seismic testing → Testing and debugging → Packaging

Equipment: Pressure pump, calibration bench, precision gauge, pressure testing equipment, vibration testing bench

Tools: screwdriver, wrench, scissors

Measuring tools: precision gauge, vernier caliper

4. Seismic grade description and testing process method for seismic pressure gauges--Method and steps

1. Prepare materials and components;

2. Spring tube stamping and forming;

3. Spring tube processing;

4. Welding spring tubes and joints;

5. Surface treatment and welding inspection of welding parts;

6. Assemble the checked movements, units, etc. separately;

7. Place the assembled semi-finished product on the calibration table and cover it with a shell;

8. Connect the calibration table and start pressurizing. First, increase the pressure to full range and maintain it for 5 minutes. Check for any leaks. If there are no leaks, select 3-4 pressure points based on the range, and the pressure error displayed on the precision gauge should not exceed 1.6% F.S;

9. Place the product in a vacuum pump and vacuum it for 15 minutes;

10. Take out the pressure gauge that has been vacuumed, perform seismic testing, and repeat steps 4 until it is qualified. Record each data segment and inspect the appearance before packaging and transferring to the finished product warehouse.