While similar in appearance to orifices for the 143 series

Critical System Protection: Acts as a primary safety interlock switch

preventing the common "play" in linkage that leads to premature gear wear and loss of proportional control accuracy

Automatic Reset Logic: Eliminates the need for manual intervention once temperatures return to safe operating levels

For pure high-efficiency power transmission in fixed drives

Danfoss 013G-8039 Valve Insert While similar in appearance toThe Danfoss 013G 8039 is a precision engineered RA FN valve insert designed for high performance hydraulic balancing in commercial and residential heating systems. Developed as a direct replacement component, this Danfoss radiator valve insert ensures consistent flow regulation without the need for a full valve body replacement, reducing labor costs and system downtime. It is specifically compatible with RA FN series valve bodies and is optimized for