Temperature Control

Self Operated Temperature Regulator - Mark 80 Series
The Mark 80 Series Temperature Regulator features the advanced sliding gate seat technology pioneered by Jordan Valve.   Using the Jordan Valve sliding gate seat technology, the Mark 80 temperature regulators have the signature straight-through flow, short-stroke that is 1/3 of a globe-...
Internal Piloted Temperature Regulator - Mark 82 Series
The Mark 82 is an internally piloted regulator offering better accuracy than a direct acting temperature regulator.  The MK82 is available in two configurations, reverse and direct. The internal pilot valve seats and the main valve seats, in resting position, are up and closed. As the...
Controlled Failure Temperature Regulator - Mark 85 Series
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. The Mark 85 is designed to fail closed on heating applications and to fail open on cooling...
Ambient Temperature Regulator - Mark 86 Series
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. The Mark 86 allows steam to flow through the tracer lines only when it is...
Piloted Temperature Regulator - Mark 87 Series
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. Utilizing the same technology as the industry-leading, self-contained Mark 80 Temperature Regulator, the Mark 87...
Three-Way Temperature Regulator - Mark 89 Series
The Mark 89 is used for diverting service and is ideal for bypassing fluids around coolers or filters. In this configuration, there is one inlet and two outlets. As one inlet closes the other outlet opens, diverting flow from one channel to the other. The Mark 89MX is used as a combining or...