Safety valve pressure Testing equipment Safety valve calibration bench
The safety valve calibration bench produced by Jinan Saisite can be divided into digital display meter control and computer control. The digital display meter can realize 1) acquisition of take-off pressure and reseating pressure 2) setting of pressure holding time, pressure and differential pressure 3) selection of clamping seat 4) selection of clamping force completely realizes semi-automatic detection, which is different from other Manual control type produced by the manufacturer. The computer controlled safety valve calibration bench adopts the data acquisition software of American NI company, which has powerful functions and stable performance. The whole experiment process can be automatically completed on the computer, and the pressure curve can be displayed. The test parameters can be set freely, such as the test pressure, pressure holding time, allowable pressure drop, etc.
Main functions of safety valve calibration bench
The safety valve calibration bench uses high-pressure air as the medium to test the sealing performance, take-off pressure, reseating pressure, etc. of the safety valve.
Typical application of safety valve calibration bench
DN32～400mm flange Type safety valve, "~" threaded safety valve, full lift/micro lift safety valve, conventional thick and thin flange safety valve, domestic/imported safety valve, Spring Performance test of direct load safety valve, safety valve with power auxiliary function and safety valve with supplementary load.
Technical parameters of safety valve calibration bench
1. Pressure range: 0-32MPa, larger output pressure 40MPa;
2. Test medium: air;
3. Test pressure output: 1 channel;
4. Diameter of test valve: DN 25-200mm
5. Pressure control accuracy: ≤± 1% F.S;
6. Pressure measurement accuracy: 0.4 level pressure gauge (higher pressure level is optional);
7. Measuring range of pressure gauge: 0-2.5MPa, 0-10MPa, 0-25MPa, 0-40MPa, 0-60MPa (can be selected as required)
8. Clamping mode: hydraulic cylinder clamping;
9. Clamping force output range: 0-50 tons;
10 Sealing method: sealed by sealing ring;
11. Driving gas source: ≤ 7bar, large gas consumption: 0.8 standard cubic meter/minute;
12. Compressed air quality requirements: filtering accuracy: 15 μ m； Atmospheric dew point: 3 ℃; Oil content (PPM): ≤ 5.0
Technical parameters of tooling
one 、 DN100 Safety valve clamping seat
Safety valve outlet: DN32 - DN100
Higher calibration pressure: PN 32MPA
Large clamping force: 40KN
Working medium: clean air, nitrogen
Operating temperature: 0-50 ℃
Driving gas source: 0.3~0.8MPa
two 、 DN300 Safety valve clamping seat
Safety valve outlet: DN100-DN300
Higher calibration pressure: PN 16MPA
Large clamping force: 200KN
Working medium: clean air, nitrogen
Operating temperature: 0-50 ℃
Driving gas source: 0.3~0.8MPa
System characteristics
a) The highly accurate pressure regulating valve regulates the output pressure and manually controls the test process through the button switch on the control cabinet.
b) The pneumatic pressurization technology is used to stabilize and maintain the pressure without fluctuation, and the output pressure is adjustable.
c) The automatic clamping system is convenient for quick installation and positioning of valves.
d) The clamping pressure source adopts a gas-liquid booster pump, which has a large pressure and can automatically supplement pressure to ensure the pressure stability of the system during pressure test and prevent the safety valve from loosening;
e) All high-pressure valves, pipe fittings and joints are made of 316 materials. The system is connected without welding and sealed with conical surface, which is suitable for the sealing requirements of most hydraulic systems;
f) Ensure the voltage withstand level, safe and reliable, and suitable for most media;
g) The worktable adopts the form of three jaws, and the output force is stable and evenly distributed;
h) Level 0.4 pressure gauge is used, and pressure gauge distribution of different ranges is provided to improve the detection accuracy;
i) High quality pneumatic liquid booster pump and pneumatic gas booster pump jointly developed with Germany, as well as imported Parker and SMC high-quality pneumatic components, very high pressure valves, pipe fittings and joint quality products are adopted.
j) The equipment can be configured with a pressure gauge according to the customer's needs and an external interface is reserved to facilitate the customer to replace the pressure gauge according to the actual measured pressure.
Introduction to system principle
The power source of the equipment is the pneumatic booster pump developed in cooperation with Germany. The booster pump is driven by compressed air. The output pressure of the pump is proportional to the pressure of the driving air. The output pressure can be adjusted steplessly by adjusting the pressure of the driving air. In this system, the electric proportional pressure regulating valve is used to control the output pressure of the pump and the pressure rise rate, It has the advantages of high pressure control accuracy, adjustable output pressure and pressure rise rate. The whole test process can be automatically completed on the computer, and each test parameter can be set freely, such as test pressure, pressure holding time, allowable pressure drop, etc. Automatic pressure relief after test.
Powertrain:
Gas high-pressure pump: Jinan Saisite safety valve calibration bench uses the self-developed pneumatic booster pump (12 year quality assurance) as the power source. The booster pump is driven by compressed air. The output pressure of the pump is proportional to the pressure of the driving air. The gas booster pump is a two-stage booster pump, which can increase the lower pressure gas to a very high pressure. Drive gas ≤ 8bar, pressure range of gas inlet is 0.3-10bar, which can be increased to 48Mpa if larger. The whole gas booster pump is made of aluminum alloy and stainless steel. Both pump heads are equipped with exhaust cooling function.
Outline drawing:
Flow curve
High pressure valve : The pressure resistance reaches 10000psi-15000psi, the ferrule joint is sealed, convenient for disassembly and good repeatability, and its performance is stable and reliable after long-term use.
Pressure regulating valve: High precision large piston pressure reducing valve, pressure resistance rating of 60000 psi, with self venting function, large pressure setting range and good sensitivity.
