What are the troubleshooting methods for the leakage of the return cylinder of the four-column hydraulic press?

What are the troubleshooting methods for the return cylinder of the four-column Hydraulic Press?

1, soap bubble detection method

The four-column hydraulic press can be used when the leakage is large or in operation. The four-column hydraulic press manufacturer will use a brush to detect the soapy water in the sealing link that may leak. The leakage point is the place where the outward bubbling occurs. The leakage rate can be detected by this method. 104mL atmospheric pressure/sec leak point.

2, SF6 leak detection method

Suitable for four-column hydraulic press newly installed or reinstalled after overhaul, or small leaks that cannot be detected with soap bubbles during operation. One type of SF6 detector can quantitatively detect leaks and air leakage, and the other is to reflect the concentration of air leakage. The SF6 leak detector detects the SF6 concentration in the enclosed space and calculates the annual leakage.

3, vacuum monitoring method

For the four-column hydraulic press that is newly installed or reassembled after maintenance, the manufacturer of the four-column hydraulic press first evacuates the reinstallation device and connecting pipe to 1 Torr, and observes for 20 minutes to confirm that there is no leakage before use. Open the equipment side valve and vacuum the equipment to 1 Torr. Keep the vacuum for 4 hours. If the vacuum drop does not exceed 1 Torr, it is considered that the equipment has no leakage.

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