DYFJ-E100 High-Pressure Hydraulic Valve Test Bench

The DYFJ-E100 type valve testing bench is a fourth-generation valve pressure testing and detection equipment independently developed by Duojia Hydraulics, based on many years of production experience and in accordance with national standards and specifications.

The DYFJ-E100 type valve test bench integrates mechanical and electrical, hydraulic systems, pressure testing, and liquid medium storage and recycling into one, featuring complete functions, stable performance, and high level of automation. It is widely used for sealing surface leakage testing and other performance tests such as shell strength (pinholes) of various high, medium, and low-pressure valves with nominal bore sizes of 15-100mm, in straight-through flanged designs. Test media: water, gas, oil.

The equipment is driven by hydraulic power and controlled by electricity, exerting no additional external force on the valves that could affect test results. This significantly enhances work efficiency and reduces labor intensity, making it an ideal new generation pressure testing and inspection equipment for valve manufacturing enterprises, users, and maintenance units.

DYFJ-E100 Type Valve Test Bench Working Principle and Structure

The DYFJ-E100 type valve test bench operates by positioning the valve flange and clamping the back of the flange with live claws, ensuring no external forces affecting the test results that could influence the valve testing, in compliance with national standard requirements for valve testing.

The equipment is roughly divided into hydraulic pressure supply systems, electrical control systems, water circulation systems, and various operating devices.

The equipment is a horizontal top-pressure type, with both left and right workbenches sealed with blind flanges. The left workbench is equipped with a forward and reverse mechanism, directly driven by a hydraulic cylinder, ensuring uniform force on the valve sealing surface and reliable tightness. The right workbench is stationary, featuring bidirectional water intake and drainage. The sealing disc is fitted with drainage and exhaust valves, facilitating the inspection of gas-tightness tests and observation of the valve sealing surface. It boasts excellent performance and a simple, compact structure.

Operation Instructions

1. Valve Mounting Method

Select a valve with a nominal bore size corresponding to the equipment model, turn on the power, and start the hydraulic system. Move the left-hand cylinder back until it is longer than the valve being tested. Place the valve flange face tightly against the right-hand workbench test blind plate, aligning with the center opening. Advance the left-hand movable frame to the right-hand fixed workbench, with the other end of the valve being tested pressed against the left-hand test blind plate, aligning with the center opening. The valve is in a horizontal position overall.

2. Water Pressure Testing Methods (Bi-directional Inflow, Drainage)

After the valve mount is complete, refer to the "Clamping Cylinder Pressure Comparison Table" to increase the hydraulic clamp force to the required pressure. Adjust the electrical contact pressure gauge (for example, with a 25 kg valve, adjust the gauge pointer to 2.5 MPa). Open the main water intake, left and right water intake valves, close the air intake, drain, and vent valves. Start the low-pressure water pump, observe the movement of the water pressure gauge pointer. When the pointer stops rising, it indicates that the valve cavity is full of water. Start the high-pressure water pump; the high-pressure water pump automatically stops when the water pressure reaches the set pressure on the electrical contact pressure gauge. The equipment enters the water pressure maintenance state.

Upon reaching the pressure-holding time, the valve is problem-free. First, open the water drain valve to release the water pressure inside the valve cavity, then remove the valve.

3. Pressure Testing Methods (Bi-directional Intake, Exhaust)

The equipment does not come with a gas source. The user must provide a separate gas source. Please consult the manufacturer before using high-pressure gases.

After the valve mount is complete (for example, using compressed air, typically not exceeding 10 kg of pressure), open the water and air intake valves, and close the water and air exhaust valves. Close the water and air intake valves when the pressure gauge reaches the maximum pressure, and the equipment is in a pressure-holding state.

Upon reaching the pressure-holding time, the valve is free of any issues. First, open the vent valve to release the pressure inside the valve chamber, then remove the valve.

Use Instructions and Requirements

1. Ensure the equipment is level during installation or securely anchor the base slot steel with concrete.

2. Use 46-grade anti-wear hydraulic oil (for temperatures below 0°C, use antifreeze 46-grade anti-wear hydraulic oil), ensuring the oil level does not fall below the gauge's lower limit. Regularly check the oil level and hydraulic oil. After one year of use, clean the oil tank and replace the hydraulic oil.

3. Add rust inhibitor to the recirculating water, and change the water promptly when the water quality deteriorates.

4. The work surface of the equipment should be kept clean, and there should be no debris between the test valve flange and the test pressure blank flange.

5. Add lubricant to all moving parts of the test bench to ensure clean and smooth operation.

6. Operators must undergo professional training before taking their posts, adhere to standard operations, and prioritize safety.