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Description
Doc No: OMMB00010 Revision: 7 – Mar 2014
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 unit 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.
Seawater cooling.
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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