DYFJ-H1600 Hydraulic Butterfly Valve Test Bench

The DYFJ-H1600 valve test bench is the fourth-generation pressure testing and detection equipment independently developed by Duojia Hydraulics on the basis of many years of production experience, in accordance with national standards and specifications.

The DYFJ-H1600 type valve test bench integrates mechanical and electrical systems, hydraulic systems, pressure testing, and liquid medium storage and recycling. It features comprehensive functions, stable performance, and high automation. It is widely used for sealing face leakage testing of various high, medium, and low-pressure valves with nominal diameters of 300-1600mm, as well as performance tests such as shell strength (pore). Test media: water, gas, oil.

The equipment is hydraulically driven and electrically controlled throughout the process, exerting no additional external forces on the valves that could affect test results. This significantly enhances work efficiency and reduces labor intensity, making it the ideal new generation pressure testing equipment for valve manufacturing companies, users, and maintenance units.

DYFJ-H1600 type valve test bench working principle and structure

The DYFJ-H1600 type valve test bench operates by using valve flange positioning and a live pawl to clamp the back of the flange, ensuring no external forces affect the test results, thereby meeting the national standard valve testing requirements.

Equipment is generally categorized into hydraulic pressure supply systems, electrical control systems, water circulation systems, and various operating devices.

The equipment is clamp-style, with each side of the workbench sealed with a blind flange. The hydraulic gripper features axial extension and radial movement, directly driven by a hydraulic cylinder, ensuring even force distribution on the valve sealing surface for reliable clamping. During butterfly valve testing, the sealing performance can be directly observed, facilitating the inspection of air-sealing tests and the observation of the valve sealing surface. It boasts good performance and a simple, compact structure.

Technical Specifications

Operation Instructions

1. Valve Mounting Method

Select a valve with a nominal bore size that matches the equipment model, turn on the power, and start the hydraulic system. Move the hydraulic clamping jaw radially to exceed the outer diameter of the test valve flange, and extend the axial movement of the clamping jaw to exceed the valve length. Place the bottom flange of the valve against the workbench test blind plate, aligning with the center opening. Radially move the clamping jaw close to the valve flange, and axially move the clamping jaw to make it tightly adhere to the front of the valve flange. At this point, the valve is securely clamped by the system, ensuring it does not wobble.

During the test of the valve body strength, the other end of the valve to be tested is tightly sealed against the upper test blind flange, aligned with the central opening. Radially move the clamping jaws close to the valve flange, and axially move the clamping jaws to make the jaws tightly adhere to the back of the valve test blind flange. At this moment, the valve should be securely gripped and fixed by the clamping system, with the entire valve in a stable state.

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

After the valve mount is completed, refer to the "Clamping Cylinder Pressure Comparison Table" to increase the gripping force of the hydraulic clamp to the required pressure. Adjust the electrical contact pressure gauge (for example, for a 25 kg valve, adjust the pointer of the electrical contact pressure gauge to 2.5 MPa). Open the main water inlet, left and right water inlets, close the air inlet, drain, and exhaust 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; when the water pressure reaches the pressure set on the electrical contact pressure gauge, the high-pressure water pump automatically stops, and the equipment enters the water pressure maintenance state.

Upon reaching the pressure holding time, the valve shows no issues. First, open the drain valve to release the water pressure inside the valve cavity, then remove the valve.

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

The equipment is not equipped with a gas source. Users must provide their own gas source. Please consult the manufacturer before using high-pressure gases.

After the valve fixture is completed (using pressure air as an example, generally not exceeding 10 kg), open the inlet and air inlet valves, and close the drain and air release valves. Close the inlet and air inlet 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 shows no issues. It should be initially opened to release the air pressure within the valve chamber before removing the valve.

Use Instructions and Requirements

1. Align the equipment horizontally during installation or secure the anchor slots with concrete.

2. Use 46-grade anti-wear hydraulic oil (for temperatures below 0°C, use anti-freeze 46-grade anti-wear hydraulic oil). Ensure 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 valve flange under test and the pressure test blind plate.

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

6. Operators must undergo professional training before starting work, adhere to standard procedures, and prioritize safety.