Description

一、 Basic Technical Parameters

Item Specification
Max. Test Pressure 32 MPa
Max. Clamping Force 300 KN
Pressure Test Accuracy 0.4%
Operating Temperature -20℃ ~ 60℃
Medium Size Seat Range DN15 ~ DN200
Large Size Seat Range DN250 ~ DN400
Test Medium Nitrogen, Compressed Air
Clamping Method Down-pull Hydraulic Clamping
Hydraulic Working Pressure 30 MPa
Pressure Gauge Ranges 1.6MPa, 4MPa, 16MPa, 60MPa
Pressure Gauge Accuracy Class 0.4

二、 Caliber & Max Test Pressure Matching Table

Valve Nominal Diameter DN ≤32 32 50 65 80 100 150 200
Max. Calibration Pressure (MPa) 32 32 32 32 28 18 10 5.2
Valve Nominal Diameter DN 250 300 350 400
Max. Calibration Pressure (MPa) 3.5 2.5 2 1.6

三、Applicable Safety Valves

  1. Flanged safety valves, nominal diameter DN15 ~ DN400
  2. Low-pressure large-bore safety valves, PN ≤ 32MPa
  3. Full-lift & low-lift safety valves
  4. 1/2″ ~ 2 1/2″ British thread type A27W-10T safety valves
  5. Flanged safety valves with various thickness and outline dimensions
  6. Metric & imperial threaded safety valves
  7. Domestic and imported safety valves
  8. Safety valves for gas medium and liquid medium

四、Technical Parameters of Safety Valve Test Bench
    1.Pressure calibration accuracy: 0.4%;

2.Operating temperature range: -20℃ ~ 60℃;

3.Power supply: 220V AC;

4.Clamping force: 300KN. The system automatically adjusts pre-clamping force along with test pressure.

5. Maximum calibration pressure: 32 MPa.

6.Medium-bore seat: DN15～ Equipped with hydraulic lifting control buttons, hydraulic pressure gauges and station valves, suitable for high & low pressure safety valves. Check valves are installed in gas circuit to prevent high-pressure medium from entering low-pressure system.

7.Large-bore seat: DN250～ Equipped with hydraulic lifting control buttons, hydraulic pressure gauges and station valves, designed for low-pressure large-bore safety valves.

8.The stainless steel control panel is fitted with eight analog pressure gauges for dual pressure display. Four gauge ranges available: 1.6MPa, 4MPa, 16MPa, 60MPa, accuracy class 0.4. High and low pressure source pressure gauges are separately mounted on the panel.

9.The clamping station adopts hydraulic system (bi-directional double-station hydraulic power unit & hydraulic cylinder with 30MPa working pressure) for fixing and clamping. Clamping force: 7 ~ 30 tons.

Equipment Requirements

  1. Double-seat structure with hydraulic clamping, equipped with electric bi-directional double-station hydraulic power unit.
  2. Down-pull clamping structure. No secondary movement of safety valve after clamping.
  3. The clamping device supports electric stepless lifting adjustment according to flange thickness, compatible with flanges of different thicknesses, suitable for both large and small valve seats with easy & precise operation.
  4. Smooth clamping adjustment without jamming.
  5. Down-pull force structure: clamping force will not act on the tabletop; the tabletop only bears load weight.
  6. Standard center positioning block for fast and accurate safety valve installation, improving working efficiency.
  7. The clamping mechanism shall be free of shaking when calibrating safety valves.