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Temperature Control

Mark 80 Series – Self Operated

The Mark 80 Series is completely self-operated and requires no external power source or additional instrumentation to operate the valve.

Mark 82 Series – Internal Piloted

The Mark 82 is a reverse acting internally piloted temperature regulator. The upstream pressure passes through the pilot valve and the pilot port, opening the main valve to provide the required cooling action.

Mark 85 Series - Controlled Failure Regulator

The Mark 85 Series is a self-operated temperature regulator with a controlled failure option, which allows you to predetermine the position of the valve in the event of thermal system failure...

Mark 86 Series - Ambient Temperature Regulator

The Mark 86 Ambient Temperature Regulator is designed to control steam-tracing lines based on ambient temperatures. Steam tracing lines are commonly used to protect outdoor instrumentation, pipelines and tanks from freezing...

Mark 87 Series - Piloted Temperature Regulator

The Mark 87 piloted temperature regulator is the sliding gate valve engineered to provide wide rangeability and greater accuracy for a variety of temperature control applications...

Mark 89/89MX Series- Three-Way Regulator

The Mark 89 is used for diverting services and is ideal for bypassing fluids around coolers or heat exchangers based on fluid temperature.

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