http://www.delta5.rs/pp_program.html

To je ventil koji sa jedne strane ima priključak za cev hidrantske mreže, sa druge ima priključak za crevo a nalazi se u hidrantskom ormariću. Hidrantski ormarići se nalaze na podestima/odmorištima požarnih stepeništa, otuda "landing valve".
http://www.linkedin.com/groups/What-is-Landing-valve-fire-14...
What is Landing valve or fire department valve?
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Landing valve is the term used in the UK to refer to the 2 1/2" standpipe hose valves.
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In Canada we called that Hose Connection.
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Landing valve or fire department valve :
A Class I standpipe system shall provide 21/2-in. (63.5-mm) hose connections to supply water for use by fire departments and those trained in handling heavy fire streams.in the following locations:
(a) At each intermediate landing between floor levels in every required exit stairway.
Exception: Hose connections shall be permitted to be located at the main floor landings in exit stairways where approved by the authority having jurisdiction.
(b) On each side of the wall adjacent to the exit openings of horizontal exits.
(c) In each exit passageway at the entrance from the building areas into the passageway.
(d) In covered mall buildings, at the entrance to each exit passageway or exit corridor, and at exterior public entrances to the mall.
(e) At the highest landing of stairways with stairway access to a roof, and on the roof where stairways do not access the roof. An additional 21/2-in. (63.5-mm) hose connection shall be provided at the hydraulically most remote riser to facilitate testing of the system...

landing valve = fire department valve = hose connection

Ovo je oprema koja se nalazi u hidrantskom ormariću koji se spominje u tekstu:
http://www.tehnototal.co.rs/Hidranti i oprema.html
Ormar za zidni hidrant
Dimenzije: 500x500x144 mm
Sadržaj:
1 x crevo TREVIRA ø52 od 15m
1 x mlaznica ø52
1 x priključni ventil 2" - ugaoni ili drugi

Ovaj ventil može ali ne mora obavezno da bude ugaoni ventil, pogledajte koliko ima raznih tipova priključnih ventila (landing valve), ovde su navedeni samo neki tipovi:
http://www.naffco.com/products/pr11/pr11010100.html
Oblique Landing Valve
Right Angle Landing Valve
Straight Through Landing Valve (Horizontal Type)
Bib Nose Type Landing Valve
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Landing Valves are used for fighting fire with water and accordingly mounted in fire hydrant system at Internal or External places. The landing valves are sometimes also referred to as internal hydrants because they are usually fitted inside the buildings for wet hydrant system.

Još tipova priključnih ventila:
http://wofu001.en.made-in-china.com/productimage/pBeJWPUuVfV...

http://www.search-document.com/pdf/3/din-14461-3.html
Vsebina omarice: 1 kom priključni ventil 2 '' DIN 14461-3
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hose connection acc. to DIN 14461-3

Pogledajte sliku ovde:
http://katalog.fln-neuruppin.de/en/products/1428/
Landing valve 2" brass, DIN 14461-3
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inlet male thread for pipe connection, outlet brass coupling size Storz "C" for hose connection.

Poslednja rečenica otprilike glasi: na ulazu unutrašnji navoj za priključak cevi*, na izlazu mesingana spojnica za priključak creva
*cev hidrantske mreže

http://www.latipro.net/PagAdm/PPHOrmar.asp
Zidni hidrantski ormarić HOZ (540 x 540 x 144 mm)
Crevo trevira Ø 52 L 15 m
Mlaznica sa ručkom Ø 52
Priključni ventil 2" - ugaoni

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Note added at 21 hrs (2013-11-21 08:13:22 GMT)
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http://www.techstreet.com/products/1266988
DIN 14461-3
Delivery valve installations for firefighting purposes - Part 3: Fire hose valves for nominal pressure PN 16