TURKOGLU
Turkey
Body and Cover : GG-25 Cast Iron / Handwheel: GG-25 Cast Iron / Gasket: EPDM / O-ring: EPDM / Spindle: Stainless steel / Segment Gear : GG-25 Cast Iron . ** Connection Type: Flanged / Working Pressure :175-300 PSI / Working Temp.:-10ºC , + 120ºC / Working Test Pressure : 600 PSI *** NRS gate valve is developed to be used as the cut off and zone control valves in order to substitute supervisory switched butterfly valves and OSY rising stem valves in the fire security systems. These valves are usually burried underground to prevent the risk of freeze. Just to make them visible and traceable inside the systems, they are preferred to be used with post indicators instead of wheels. **** Application Areas: In fire fighting systems, which is non-affected by freeze, than they are using under the soil.
ENKI WATER TREATMENT TECH. LTD
Turkey
Ammonia NH3, Hydrogen Sulfide H2S The collection and processing of sewage and industrial waste water is often a source of unpleasant odors mainly ammonia (NH3) and Hydrogen sulfide (H2S). These odors come from screening unit, sand/grit removal unit, pump station and sludge dewatering unit. enki’s two stage counter-flow vertical Packed Bed Scrubber removes these odors. The first packed tower uses aqueous sulfuric acid (H2SO4) solution to remove ammonia (NH3) according to the below reaction: 2NH3 + H2SO4 ➝ (NH4)2SO4 Ammonium sulfate salt [(NH4)2SO4], is soluble and non-volatile and it is easily removed by the blowdown. In the second stage are used sodium hydroxide (NaOH) and sodium hypochlorite (NaOCl) solution. NaOCl oxidizes the hydrogen sulfide. The complete reaction is given below: H2S + 4 NaOCl + 2NaOH ➝ Na2SO4 + 4NaCl + 2H2O Na2SO4 and NaCl are removed by the blowdown. The efficiency for removal of NH3 and H2S is greater than 99%.
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