Safety shut-off valve type 690, 690-K is intended to protect the closed systems for natural gas preheating, oil and other energy-related and technical fluids, which are under higher pressure than the pressure in the installation of the heating fluid.
For safety reasons, safety shut-off valve type:690.690-K can be deactivated only manualy.

Temperature operating range is (-10 ÷ +110)° C, and on special request it can be (-60 ÷ + 110) °C.