Dry Riser Valves
Landing
Valves
Landing valves used on dry rising mains should normally be of the gate
valve type, but global pattern valves are occasionally used. They act
as outlets from the rising from the rising main and are fitted in easily
accessible positions on each floor above the first floor and sometimes
in deep basement areas.
Dry
Riser Gate Valves
With 2.5" instantaneous female outlet to BS 336, blank cap and
chain, strap and padlock. Dry riser gate valves comply with the requirements
of BS 5041: Part 2. Valves can be mounted in boxes complying with BS5041:
Part 4.
* Inlet
flanged 2.5" BSP or 3" BS Table D or 65mm BS 4504 Table 16/21.
* Inlet screwed 2.5" BSP.
Globe
Pattern Landing Valves (LP)
These screw-down stop valves are primarily used as hydrant outlets on
wet rising mains, but are occasionally used on dry risers under special
circumstances and after discussion with the fire brigade.
* Gunmetal
bodies, major working parts in manganese bronze.
* Comply with the requirements os BS 504: Part 1 and BS 5154.
* Outlets are 2.5" instantaneous female to BS 336 and inlets flanged
or screwed as required.
* Accessories include blank caps and chain, straps and padlocks.
