The DYFJ-H2000 type valve testing bench is the fourth-generation pressure testing and detection equipment independently developed by Duojia Hydraulics Co., Ltd., based on years of production experience and in accordance with national standards and specifications.

The DYFJ-H2000 type valve test bench integrates mechanical and electrical, hydraulic systems, pressure testing, and storage and recycling of liquid mediums. It features comprehensive functions, stable performance, and high automation. It is widely used for sealing surface leakage testing and various performance tests such as shell strength (pores) on straight-through flanged high, medium, and low-pressure valves with nominal bore sizes of 1200-2000mm. Test media: water, gas, oil.

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

DYFJ-H2000 type valve test bench working principle and structure

The DYFJ-H2000 type valve test bench operates by locating the valve flange and clamping the back of the flange with live claws, ensuring no external forces affecting the test results, in compliance with national standard valve testing requirements.

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

The equipment is clamping-type, with both sides of the workbench sealed with blind flanges. The hydraulic clamping jaws feature axial extension and radial movement capabilities, directly driven by a hydraulic cylinder for even distribution of pressure on the valve sealing surface, ensuring reliable clamping. When testing the butterfly valve, the sealing performance can be directly observed, facilitating checks for air tightness tests and observations of the valve sealing surface. It boasts good performance and a simple, compact structure.

Technical Specifications

Operation Instructions

Valve Mounting Method

Select a valve with the nominal diameter that matches the equipment model, turn on the power supply, and start the hydraulic system. The hydraulic clamping jaws move radially outward beyond the outer diameter of the test valve flange, and the axial extension moves beyond the valve length. Place the bottom flange of the valve against the test bench blind plate, aligning with the center opening. Radially move the jaws close to the valve flange, and axially move the jaws to ensure they tightly abut the front of the valve flange. At this point, the valve is securely clamped and fixed by the clamping system, ensuring the valve does not vibrate.

During the test of the valve body strength, the other end of the valve to be tested is tightly sealed against the upper pressure test blind flange, aligned with the central hollow position. Radially move the clamping jaws close to the valve flange. Axially move the clamping jaws to make the jaws tightly abut the back of the valve test blind flange. At this moment, the valve should be securely held and fixed by the clamping system, with the valve in a stable overall state.

2. Water Pressure Testing Methods (Bidirectional Inflow and Drainage)

After the valve fixture is completed, refer to the "Clamping Cylinder Pressure Reference Table" to increase the hydraulic clamp's gripping force to the required pressure. Adjust the electrical contact pressure gauge (for a 25 kg valve, adjust the gauge pointer to 2.5 MPa). Open the main water inlet, left and right water inlet valves, close the air inlet, 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 drain valve to relieve the water pressure inside the valve chamber, then remove the valve.

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

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

After the valve clamp is completed (using pressure air as an example, the general pressure does not exceed 10 kg), open the inlet water and air valves, and close the drain water and air valves. Close the inlet water and air valves when the pressure gauge reaches the highest pressure, and the equipment is in a pressure maintenance 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.

Handling Instructions and Requirements

1. Align the equipment horizontally during installation or use concrete to secure the base槽钢.

2. Use 46-grade anti-wear hydraulic oil (use anti-freeze 46-grade anti-wear hydraulic oil below 0℃), ensuring the oil level does not fall below the indicator. 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 replace it promptly when the water quality deteriorates.

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

5. Add lubricating oil 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.