Small hydraulic safety valve calibration table thread safety valve pressure calibration table

model	svtb-06mp
Product specification	svtb-06mp
overall dimension	1200*750*1320 (mm)
weight	100 (kg)
product use	suitable for comprehensive testing of various threaded safety valves
Product model	svt

Thread safety valve pressure calibration table   Small hydraulic safety valve calibration table
1、 Function
The digital display manual control safety valve comprehensive verification platform uses high-pressure air as the medium to test the sealing performance, take-off pressure, reseating pressure, etc
of various safety valves
Assess its pressure safety performance
National Service thermoelectricity 18660149158  QQ 2622536687 
2、 Technical parameters
1
Pressure range: 5MPa
2
Test medium: air or nitrogen
3
Control mode: manual control, digital display meter acquisition
4
Test pressure output: 1 circuit;
5
Pressure measurement accuracy: level 0
4 pressure gauge;
6
Measuring range of pressure gauge (double gauge calibration): 0-6MPa
7
Sealing method: thread sealing;
8
Driving air source: 6-8bar, maximum air consumption: 1
0 standard cubic meter / minute;
9
High pressure air source: built-in booster pump (the equipment has a nitrogen high-pressure inlet, and the high-pressure air source of nitrogen cylinder can be used)
10
Compressed air quality requirements: filtration accuracy: 15 μ m； Atmospheric dew point: 3 ℃; Oil content (PPM): ≤ 5
0

3、 System composition
It is mainly composed of power system, workpiece clamping system, data acquisition and testing system, electrical control and output system, etc

Power system:
Booster pump sta10: driving pressure 6-8bar; Output pressure 5-8mpa; Supply pressure for high pressure output;
Data acquisition and testing system:
The pressure acquisition system is composed of single chip microcomputer, digital display meter, pressure transmitter, etc
, which can collect the pressure value in real time

The digital display meter automatically collects the take-off pressure and reseating pressure
4、 Description of mechanical control part (simple schematic diagram for reference, different models will vary)
5、 Digital display meter control interface reference:
Brief description of use steps:
1
Connection: workshop compressed air to the drive air inlet (0
5-0
8mpa), and add clean lubricating oil to the oil atomizer of the binary
10 × or 20 × machine oil is used in the south, and antifreeze machine oil or low pour point hydraulic oil is used in the north in winter
Each refueling is 2/3 of the volume of the oil cup

2
Power on
3
Connect the tested safety valve
4
Adjust the [pressure regulating valve] to adjust the appropriate air supply pressure (0
5-0
8mpa)
5
Adjustment of digital display meter:
6
After the parameters are set, the test can be carried out
Turn off the [nitrogen switch], turn on the [high pressure switch], press the [booster pump start stop button] to start pressurizing the air tank
When the required pressure is reached (generally about 4-5mpa), press this button again to stop pressurizing

7
The digital display meter automatically displays the take-off and reseating pressure
Save this data before testing the next safety valve again
When testing the next safety valve, just follow the above steps, and the digital display meter automatically collects the new take-off and reseating pressure

8
When using the nitrogen bottle, turn off the [high pressure switch] and turn on the [nitrogen switch]
  Air conditioning safety valve calibration table - pressure detection equipment
summary
The air conditioning safety valve calibration bench is used to detect the sealing performance, take-off pressure and other pressure indicators of the air conditioning safety valve
The calibration bench adopts PLC intelligent control system, and the data acquisition part adopts high-precision pressure transmitter and 0
4-level precision pressure gauge
Each test parameter can be set freely, such as test pressure, pressure holding time, allowable pressure drop, etc
At the same time, it can also detect the air tightness of the pressure switch for air conditioning

Main technical parameters
Pressure range: 0 ~ 4
0Mpa
Test medium: compressed air or nitrogen (please consult for special media);
Medium temperature: normal temperature (please consult for special temperature requirements);
Test station: 1;
Applicable caliber: zg1/4, zg3/8, zg1/2;
Clamping method: threaded thread;
Valve type: threaded;
Pressure measurement accuracy: level 0
4 pressure gauge
  ± 0
3% FS sensor
Driving air: 0
5MPa ≤ P ≤ 0
8MPa
  Compressed air quality requirements: filtration accuracy: 15 μ m； Atmospheric dew point: 3 ℃;
  Oil content (PPM): ≤ 5
0;
Equipment principle
  The calibration table only consists of three parts: control system, pressurization system and calibration workbench

  1
  Air source part: it can be divided into control air source and preset air source, and the pressure is   0
3 － 0
6mpa  Air

  2
Control system: observe the pressure of the air source and booster system through the pressure gauge, and adjust it through the high-precision pressure regulating valve
PLC automatic control system can realize data acquisition, automatic control and other functions in the test process

  3
Booster system: it is composed of booster pump, one-way valve, accumulator, vent valve, etc

  4
Calibration platform: it is composed of installation workbench, sealing disc, bolt pressing plate, etc