The part number 81 850 503 typically refers to the Crouzet 81580503 Pneumatic Two-Hand Safety Start Module (Type III B), which is an obsolete industrial pneumatic control device used for two-hand safety operator control systems.
Function: Complete two-hand control safety start module (utilizing internal AND logic to ensure both operator hands are engaged).
Connection Type: Push-in connection for Ø 4 mm semi-rigid tubing.
Operating Pressure: 2 to 8 bar.
Port Size / Orifice: 2.5 mm.
Operating Temperature Range: -5°C to 50°C.
Certifications: RoHS compliant, ATEX conformity for hazardous environments
