Designed to provide pressure control in systems subject to thermal expansion, the Type 14480 relief valve provides accurate repeatable performance with reseating within 5% of cracking pressure or better.
 The use of hardened elements operating in a linear bearing cage ensures long life and consistent performance.
A unique feature of this valve is the lock down facility which eliminates the need to remove or disconnect the valve during proof testing of the system.
Lock down facility
Provision is made in the cap for a special lock down screw to be inserted to disable the valve and hold it closed against the increasing pressures applied during testing of the system pipework and components.
This eliminated the need to remove or disconnect the valve during test procedures. When |
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the lock down screw is removed, the valve reverts to its as set condition without further adjustment or re-calibration.
The thread in the cap is a non-preferred size, thereby preventing unauthorised insertion of other types of screw. Lock down screws are not provided with each valve to prevent unauthorised use; they are available on request.
Principal features
 Compact design derived from the use of high
performance disc springs
Hardened steel elements operating in a linear
bearing cage provide smooth repeatable
performance
Soft seats are fitted to give a low differential
between cracking and reseating pressures
typically within 5%
Set point is not affected by changes in exhaust
pressure which should not exceed 100 bar |
