Female Drive Spring Units
Torques are identical to standard and low pressure spring torques.
Female drive spring units are always designed to be mounted between the actuator and the application. Consequently, a female spring designated ‘clockwise’ as a separate module will, when mounted below an actuator, result in a ‘clockwise’ assembly. Female drive springs are not designed to interface directly with modular switch boxes, positioners etc.
ISO/DIN ‘Star’ Drives
Female bi-square (star) drive spring fail-safe units are available for models 03 to 20.
Star drive units are specified by adding a ‘F’ to the DIN/ISO code:
e.g. for a standard model 07 actuator with a female star drive, a regular 074-120 code becomes 073F120.
Female serrated drive spring fail-safe units are available for models 05, 07, 08, 09 & 10 to give maximum mounting flexibility.
Serrated drive units are (excluding couplings) specified by adding an ‘S’ to the ISO/DIN code: e.g. for a standard model 07 actuator with a serrated female drive, a regular 074-120 code becomes 073S120.
A range of blank and internally profiled serrated stainless steel couplings are available.