THE JAMARAT BRIDGE
The Jamaraat Bridge is a pedestrian bridge in Mina, Saudi Arabia near Makkah used by Muslims during the stoning of the devil ritual of the Hajj. The bridge was originally constructed in 1963, and has been expanded several times since then.The purpose of the bridge is to enable pilgrims to throw stones at the three jamrah pillars from either the ground level or from the bridge. The pillars extend up through three openings in the bridge. Until 2006 the bridge had a single tier (ie. aground level with one bridge level above).
Following the January 2006 Hajj, the old bridge was demolished and construction began on a new multi‐level bridge. The levels were complete in time for the 2009/2010 Hajj. The new bridge designed by Dar Al‐Handasah and constructed by the Bin Laden Group.
In order to provide fresh cool air, the design of desert coolers provided by SKM Air conditioning Equipments – Sharja, UAE was approved. In their design, EBARA submersible pumps type BEST 2 had been used to circulate the water inside the cooler. Thorough Ebara Authorized distributor Fawaz Air Conditioning and Refrigeration
Group, More than 1200 pumps had been delivered to the Project.
Submersible electric pumps
- Maximum immersion: 10 m
- Maximum temperature of the liquid: 35°C
- Max. solids size for passage: 10 mm
- Self-ventilated 2 pole asynchronous motor
- Class of insulation F
- IP68 Protection rating
- 230V ±10%, 50Hz single phase voltage,
400V ±10%, 50Hz three phase voltage
- Permanent capacitor inserted and thermo-amperometric protection with automatic rearm incorporated for the single phase motor
- Protection under user’s responsibility for the three phase version
- G1½ Discharge connection
- Pump body, impeller, suction grill, motor cover, seal housing disc and
motor case in AISI 304
- Shaft in AISI 303 (part in contact with the liquid)
- Twin mechanical seal with oil chamber:
– upper in Carbon/Ceramic/NBR (motor side)
– lower in SiC/SiC/NBR (pump side)