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Description
Doc No: OMMB00301 Revision: 1 – Nov 2019
Section 3
Description
3.1 Overview
The Model B Valve is designed to provide fully automatic, 3-way fluid
temperature control for diverting or mixing applications. Typical
applications include engine water jackets, lubricating oil cooling
systems, and mixing and diverting of fluids in process control and
industrial applications.
The thermostatic element (also referred to as ‘element’) in a Model B
valve is fully enclosed and factory set, providing tamper-proof
operation. For maintenance or to achieve a different set temperature
the element can be changed, although this requires removal of the
valve from its pipe work except the Model 8B Valve where the
elements are accessible whilst the valve is in position. Elements are
available with set temperatures from 13 to 116°C (55 to 240°F).
Valves are available in nine sizes, and a variety of materials to suit
different fluids.
3.1.1 Manual override
As an option, Model B Valves can be fitted with a manual override,
which allows the operator to drive the elements towards the
maximum cooling position. On the larger sizes with multiple
elements, each has its own override. Manual override should only be
used in emergencies; however, on valves with multiple elements
sometimes one element can be locked partially open to prevent the
cooler from freezing and to change operating temperature slightly.
3.2 Features
Typical applications
• Lubricating oil temperature control
• Jacket water high temperature (HT)
• Secondary water low temperature (LT)
• Heat recovery
• Water saving applications
• Boiler inlet temperature control
• Co-generation, cooling towers
• Temperature mixing or diverting
• Engine and compressor cooling system
Key benefits
• No external power source required – simple low cost
installation.
• No user setting needed – ‘fit and forget’ solution.
• Small No of parts – simple maintenance and low cost
ownership.
• Robust design capable of high vibration and shock
applications
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