INTRODUCTION
Main valves, type SPM 1 and SPM 3
Main valve type SPM is specially developed to regulate pressure
and temperature in refrigeration, freezing and air conditioning
plants with fluorinated refrigerants and ammonia. SPM is a pilot
operated main valve with screwed-in pilot valves or pilot valves
mounted in an external pilot line. Main valves type SPM are used
in refrigeration plant with dry evaporation, pump circulation,
natural circulation. The regulator is available in two variants, SPM
1and SPM 3. SPM 1 is designed to accept one pilot valve either
screwed-in or mounted in an external pilot line. SPM 3 will accept
three screwed-in pilot valves or pilot valves mounted in an
external pilot line. Thus several functions can be performed by the
same valve.
