Differential ratio of a wet alarm valve
The Loss Prevention Certification Board (LPCB part of BRE Global) sets the standards needed to ensure that fire and security products and services perform effectively. LPCB’s Loss Prevention Standards (LPS) are applied in fire and security sectors around the world.
LPS 1040 - 2.3, Requirements and testing procedures for the LPCB approval and listing of wet alarm valve sets, published by BRE Global in 2014, suggests that the differential ratio of a wet alarm valve is: ‘…the ratio of service pressure to system pressure, measured just before the valve clapper opens to equalise the pressure difference across it, when tested in accordance with the differential ratio test, 1.5.’
[edit] Related articles on Designing Buildings Wiki
- BRE articles on Designing Buildings Wiki.
- Clapper.
- Differential type dry pipe valve.
- Drenchers.
- K factor.
- Making the case for sprinklers and dispelling myths.
- Overview of automatic sprinkler system design and operation.
- Sprinkler systems explained: A guide to sprinkler installation standards and rules.
- Sprinkler.
- The cost efficiency of different combinations of fire protection measures.
- The impact of automatic sprinklers on building design.
- Watermist systems for fire protection in domestic and residential buildings DG 534.
- Wet alarm valve.
Featured articles and news
An update on Construction Products Regulation
Activities summarised by the Construction Industry Council.
How Islamic architecture shaped Europe. Book review.
The campaign to preserve a rare blacksmith bridge.
Transitional options for the next generation of heating technologies.
Government funds autism framework
Additional support being offered to job seekers with autism.
The Illustrated Guide to Renewable Technologies
BSRIA adds to its series of illustrated guides.
ECA calls for energy levy reform.
Recognising the Chartered Infrastructure Engineer
ICE considers creation of new professional designation.
Principles of conservation for bronze objects. Book review.