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JLA Valve hydraulic test bench for safety valve |

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JLA type safety valve performance test table is the first JLA type safety valve performance test table designed and developed by the scientific and technical personnel of our company according to the requirements of national standard GB/ T13927-92 and ZBJ16006-90, combining our technical experience of valve test equipments for many years. The machine is appraised by experts after being used in Maoming petrochemical inspection and repairing company and Zhenhai oil refining factory.

The test table dispenses with the traditional high-pressure gas tank with huge volume, it only to be provided with gas source of 0.6MPAa normalgas pump. It will automatically adjust to 0.6-32.0 MPa gas source by the machine, it is applicable to the setting up, open and close, blowdown pressure tests of safety valve with inside nominal diameter DN15-300mm. It has the characters such as stable performance, convenient usage, high level of automation and precise measured data.
Remarks: the pressure feeding range of YFC-A ( normal type) safety valve performance test table should be prepared by the user, and use it according to this manual. There is no other using manual provided.
Work Principle and structure

JLA type safety valve performance test table is combing the mechanical, electric and hydraulic machine together, with gas as the test medium, increasing the pressure by linkage of gas and liquid, provided with multi-stage pressure increasing device system. The function fulfills the test pressure needed in the test. The clamp of work piece is oriented by the flange end surface of tested valve, hydraulic cylinder clamp claw clamp the backside of flange. There is no effect of external force to the tested valve, completely fulfill the requirements of valve test and inspection stipulated by national standards.

The machine is composed of hydraulic system, mechanical part, electric control and multi step gas source device system. Hydraulic system is the main source of power of the test table. The clamp claw is driven by hydraulic cylinder directly. Axial clamp pressure is adjusted and increased according to different testing pressure class ( maximum hydraulic pressure increase pressure is 31.5 MPa) . Every clamp claw is force evenly and reliably. The radial movement is driven by hydraulic cylinder, every clamp claw

forward and back at the same time, flexibly and fast, ensure the usage of valves with different latus rectum. Multistep gas source pressure increasing device adopts liquid and gas linkage to increase pressure. The range is 0.6-32.0 Mpa, used for valve medium pressure test. There are alternative auto and manual operation. When choosing auto pressure increase, the operator can leave the control panel and observe the test situation in near distance.

The safety device of the test table is controlled and increased pressure by gas source regulating valve during gas source pressure increase. The electric contact pressure meter indicate stop machine.

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