An essential element of all machine screw connections is tightening or torqueing the screws to the appropriate value.
Workers of the company “PROVALVES 2012” are educated and certified to torque all nuts of flange joints to the appropriate value, with manual torque wrenches or special pneumatic tools.
Hand tools have split scales, and special equipment has been digitized. The wrench is tightened on the split scale and the nut is tightened, on digital pneumatic guns (picture on the right and below) the display is typed up to how many Nm the nut is tightened.
The tightening range is up to 24,000 Nm For nuts from OK19 to OK200