HYTORC hydraulic or pneumatic torque tools are adjustable by the oil or air pressure supplied to them.
The torque-pressure correspondence chart for each tool is the mainHYTORC calculation tool for accurate tool use.
Each model of hydraulic wrench or pneumatic screwdriver has its own correspondence chart between output torque and input hydraulic or pneumatic pressure.
All HYTORC hydraulic wrenches have a maximum operating pressure of approximately 700 bar (10,000 psi) which all HYTORC pumps are capable of delivering. With a HYTORC hydraulic pump and your key chart you are able to operate the tool over its full rated torque range. The torque/pressure matchingchart on your wrench gives you the torque for each 200 psi increment easily found on the HYTORC pump’s pressure gauge. The pressure correspondence in bars is obviously also indicated as well as the two other torque units which are ft.lbs and m.Kg (or DaN.m according to the versions). If the torque you need to apply is not indicated in the chart, a cross product of this value with the closest match will give you the adjustment to be made. The torque calculator gives you the pressure setting directly for the calculated torque for your bolt according to the hydraulic wrench that has been selected.
HYTORC pneumatic screwdrivers work up to approximately 6 bar (90 psi) pressure, which your compressed air system or mobile compressor must be able to supply to take advantage of the maximum capacity of the screwdriver. The torque-pressure correspondence chart supplied with your pneumatic torque screwdriver gives you a number of values between the two pressure units psi and bars, and their corresponding torque at the screwdriver output, expressed in the three torque units N.m, m.Kg and ft.lbs. To find the correct pressure level to set for the desired torque, a cross product of the desired torque with the closest torque-pressure match must be made.
