Hydraulic pump sizing help

Hello,

I am in need of assistance with sizing a hydraulic pump for a specific project. Here are the details:

Flow Rate: The desired flow rate for the hydraulic pump is between 10-20 gallons per minute.

Application: The hydraulic pump will be used for the lifting of a roof.

Maximum Pressure: Unfortunately, I am uncertain about the maximum pressure required for the hydraulic pump.

Skills and Experience:
- Experience in hydraulic pump sizing and selection
- Knowledge of various flow rates and their applications
- Understanding of hydraulic systems and their components

If you have the expertise in hydraulic pump sizing and are familiar with the lifting loads application, I would greatly appreciate your assistance. Please provide your qualifications and relevant experience when submitting your proposal.
i have 4 pairs of scisser lifts rated at 3500kg each, they are for lifting cars. each pair has a pump (so 4 pumps). i need all the lifts to be run of 1 pump and need to know if it is possible to use just one pump and if one of these .pumps will do the job

Thank you.