Latest Products https://www.prathamsales.co.in Latest Products Tue, 31 Mar 2020 14:58:43 +0530 en-us https://www.prathamsales.co.in Aluminium Scrap https://www.prathamsales.co.in/aluminium-scrap.htm https://www.prathamsales.co.in/aluminium-scrap.htm Tue, 04 Dec 2018 00:00:00 +0530 Brass Scrap https://www.prathamsales.co.in/brass-scrap.htm https://www.prathamsales.co.in/brass-scrap.htm Tue, 04 Dec 2018 00:00:00 +0530 Iron Scrap https://www.prathamsales.co.in/iron-scrap.htm https://www.prathamsales.co.in/iron-scrap.htm Tue, 04 Dec 2018 00:00:00 +0530 Copper Scrap https://www.prathamsales.co.in/copper-scrap.htm https://www.prathamsales.co.in/copper-scrap.htm Tue, 04 Dec 2018 00:00:00 +0530 LED Solar Lantern https://www.prathamsales.co.in/led-solar-lantern.htm https://www.prathamsales.co.in/led-solar-lantern.htm Tue, 04 Dec 2018 00:00:00 +0530 These LED solar lanterns are very easy to use and have good light intensity. These lanterns are highly reliable and durable with negligible repair & maintenance cost. Key Features : Microcontroller based electronic circuitry. Low self-discharge, highly reliable, low maintenance SMF battery. Protected from overcharging and deep discharge. LED indication for "Battery Charging" and "Battery Low". Lest no-load current. Low maintenance. High reliability and durability. More intensity of light. Use selectable high/low intensity. Excellent for remote villages as well as urban cities. With Mobile charging facility with multi pins. CFL Solar Lantern https://www.prathamsales.co.in/cfl-solar-lantern.htm https://www.prathamsales.co.in/cfl-solar-lantern.htm Tue, 04 Dec 2018 00:00:00 +0530 Key Features : 5 Models. Affordable. Reliable. Compact & Portable Omni directional Light. Maintenance - Free. High Frequency two step. Charge Controller. A/c charging - optional. As per MNRE Specification. LED Solar Home Lighting System https://www.prathamsales.co.in/led-solar-home-lighting-system.htm https://www.prathamsales.co.in/led-solar-home-lighting-system.htm Tue, 04 Dec 2018 00:00:00 +0530 Key Features : User friendly Free from noise, smoke and pollution Required very little attention Possible to expand the system in future Available in different configuration Mobile Charging (Optional) FM Radio (Optional) Night Lamp (Optional) 6V additional charging station (optional) Digital Battery Status (Optional) Available in different colors CFL Based Solar Street Light https://www.prathamsales.co.in/cfl-based-solar-street-light.htm https://www.prathamsales.co.in/cfl-based-solar-street-light.htm Tue, 04 Dec 2018 00:00:00 +0530 Key Features : PWM MOSFET based solar charge controller for efficient battery charging.) 100% short circuit protection Surge/lightning protected. Designed as user friendly installation Automatic dawn dusk operation (with timer-optional) Highly Economic and reliable. (Optional) Single Battery Type Temperature Compensated Battery charging. Approved by MNRE Govt, of India "Fit and forget" device. Excellent for remote villages Low maintenance High reliability and durability More intensity of light LED Based Solar Street Light https://www.prathamsales.co.in/led-based-solar-street-light.htm https://www.prathamsales.co.in/led-based-solar-street-light.htm Tue, 04 Dec 2018 00:00:00 +0530 Key Features : PWM MOSFET based solar charge controller for efficient battery charging. 100% short circuit protection Surge/lightning protected. Perfect design, Easy Installation Automatic dawn dusk operation (with timer-optional) Highly Economic and reliable. (Optional) Single Battery Type Temperature Compensated Battery charging. Approved by MNRE Govt, of India Excellent for remote villages Low maintenance High reliability and durability More intensity of light CC-CV output with APMS Technology (Optional) Solar Battery Charger https://www.prathamsales.co.in/solar-battery-charger.htm https://www.prathamsales.co.in/solar-battery-charger.htm Tue, 04 Dec 2018 00:00:00 +0530 Key Features : PWM MOSFET based solar charge controller for efficient battery charging.) 100% short circuit protection Surge/lightning protected. Designed as user friendly installation Automatic dawn dusk operation (with timer-optional) Highly Economic and reliable. (Optional) Single Battery Type Temperature Compensated Battery charging. Approved by MNRE Govt, of India "Fit and forget" device. Excellent for remote villages Low maintenance High reliability and durability More intensity of light ETC Solar Thermal Water Heater https://www.prathamsales.co.in/etc-solar-thermal-water-heater.htm https://www.prathamsales.co.in/etc-solar-thermal-water-heater.htm Tue, 04 Dec 2018 00:00:00 +0530 Special Features Provided in the System : System Dry Run Protection, System High Pressure Protection, System Extreme High Temperature Protection, System Evacuation Protection, Sacrificial Anode-of-Magnesium, Electrical Backup, Pressure Reducing Value, Air Relief Valve / Vent. What’s…Vacuum Tube Collectortype Solar Water Heaters works efficiently in cold climates or in 70 Deg. Hot water outlet applications? The construction of the collector tube is similar to a thermos flask, piece in that it comprises of two borosilicate glass tubes, one sealed inside the other. The outside of the inner glass tube is coated with a solar selector surface (Al-N/Al) & the space between the two tubes is evacuated & maintained at a high vacuum. This Vacuum created inside the high strength borosilicate glass tube act as an insulator supporting heat loss & enhanced performance. The use of 3.3 borosilicate glass makes this vacuum tube highly resistant to chemical & thermal shock. They are designed to suit hard water heating. There is no bonding of scales on smooth surface of glass tube. Cleaning of collector is very easy. Box Type Solar Thermal Cooker https://www.prathamsales.co.in/box-type-solar-thermal-cooker.htm https://www.prathamsales.co.in/box-type-solar-thermal-cooker.htm Tue, 04 Dec 2018 00:00:00 +0530 Key Features : Advantages Solar Cooking involves no recurring expenses on fuel. Solar energy is absolutely free. Cost of the solar cooker can be recovered easily through saving on fuel bill in a few years. A box solar cooker if used regularly can save 3 to 4 LPG cylinders per year. It saves time. You are free to do other things while food cooks in the solar cooker. There is no fear of scorching the food. It ensures a better and more nutritious cooked food because of its slow cooking design. It is durable and simple to operate. It does not pollute the environment and conserves conventional energy. It is an asset to the household and a pride to its owner. Parabolic Hybrid Solar Thermal Cooker https://www.prathamsales.co.in/parabolic-hybrid-solar-thermal-cooker.htm https://www.prathamsales.co.in/parabolic-hybrid-solar-thermal-cooker.htm Tue, 04 Dec 2018 00:00:00 +0530 Fuel Savings:The cooker can save up to 10 LPG cylinders/year on full use at small establishments. The cookers with imported reflectors having a reflectivity of over 90% will have a higher cost. This should include the cost of accessories like pressure cooker, cap, hand gloves & goggles, cooker manual, packing etc.Life:Around 20 years for metallic structure. Reflecting sheets may however, have to be replaced once in 5 years due to degradation in reflectivity.Pay back:1 ½ to 3 years depending on the extent of use & the place of utilization (for commercial establishments and large families the pay back period is less). Solar Cooked food preserves most of the vitamins, minerals and antioxidants. Vitamins and minerals increase the nutrition value while antioxidants protects from cancer. Boiling and steaming type food diet protects from most of the diseases as compared to frying, grilling and micro waving. Burning any fuel like cooking gas, kerosene, wood etc. releases gases like carbon-dioxide, carbon monoxide and nitrous oxide. Intake of these gases for long duration is a cause of major respiratory diseases in housewives. Continuous inhaling of higher carbon dioxide and carbon monoxide promotes cancer. Solar cooked food is easily digestible. It gradually relieves stomach disorder, constipation, gastric trouble and acidity. Solar Cooking improves the taste of the food to a very large extent.Why Solar Food? For ENVIRONMENT:Solar cooking does not burn any fuel and is one of the most eco-friendly options. All other fuels like wood, cooking gas etc. generate Carbon dioxide, Carbon monoxide and Nitrous oxide which are severely responsible for pollution. CO2 is a major green house gas responsible for global warming leading to natural disasters like Tsunami, Cyclone, Volcanic eruption etc. In rural areas saving firewood means saving trees. One family consumes 3 trees in the form of firewood in a year. If solar cookers are used then trees per solar cooker per year can be saved. Solar cooking can help in preserving the fast diminishing forests.Why Solar Food? For SAVINGS:One can save up to one cooking gas per month by proper utilization of solar cooker and then recover the cost within a year. Even moderate users recover the cost of the solar cooker within 2 years. With current rise in LPG cost and subsequent rise every month the saving potential is enormous.Why Solar Food? For the NATION:India imports more than 75% of the oil, it consumes. With crude oil prices in the world rocketing past $ 54 per barrel, solar cooking will help save in kerosene & cooking gas and intern save foreign exchange. One estimate suggests that even if five percent of India’s population opts for solar cooking then foreign exchange worth more than Rs. 250 Crores per year can be saved. Solar cooking preserves forests by saving firewood. This is must for national development. Adoption of solar cooking technologies will generate many employment opportunities. In rural families mostly the responsibility of collection of firewood rests with children and is one of the reasons for school drop outs. Use of solar cooking can save these children from exploitations and bring them back to school, which they deserve. With Kyoto Protocol coming in force and proposed mechanisms like CDM (Clean Development Mechanism), chances of fetching huge foreign investments and grants are excellent. Promoting solar cooking in a big way can increase India’s energy security. To cope with the speed of modern life there are many versions of solar cookers now available in India, to suit the requirement of every family. In addition to old box design of solar cookers (ovens) there are new breed of parabolic domestic and community cookers. India has to its credit the world’s largest solar cooking system at Tirupati cooking 30,000 meals per day. Generating awareness about these different solar cooking alternatives can generate excellent market for the new entrepreneurs in the field. Domestic Flat Plate Solar Thermal Water Heater https://www.prathamsales.co.in/domestic-flat-plate-solar-thermal-water-heater.htm https://www.prathamsales.co.in/domestic-flat-plate-solar-thermal-water-heater.htm Tue, 04 Dec 2018 00:00:00 +0530 There are two types of solar water heating systems, based on type of circulation: Thermosyphon Forced circulation All domestic and industrial systems upto 4000 LPD (liters per day) 60 deg.C,; works on the principle of thermosyphon. Industrial systems beyond 4000 LPD to any capacity will work on forced circulation principle.Thermosyphon system:The system works on a principle called "THERMOSYPHON" (Natural circulation).Due to density difference between the cold & hot Water, the lighter hot water flows up into the tank and the heavier cold water enters the collector.Solar radiation incident on the collector panels heats the absorber. This heat is transferred to the water contained in the absorber & becomes less dense than the water in the storage tank. Hot water starts rising and settles at the top of the storage tank. Simultaneously cold water descends to the collector absorber tubes, gets heated up and the cycle repeats.The circulation in the system during the heating process is purely due to the difference of density only. There is no other mechanical moving part, hence the system reliability is very high.At the end of the day when radiation is zero (after dark / sun set) the collector will contain heavier cold water and the tank will have lighter hot water. This will ensure that there will be no circulation during night & hence no conduction losses on account of this.The hot water storage tank is well insulated to retain the hot water temperature and to minimize the overnight temperature drop / heat losses.The Sacrificial Anode (Only for SS tank) prevents the tank from galvanic corrosion. For the monsoon / cloudy days the system is-fitted with Electrical back up heater with thermostat.Forced circulation system:In forced circulation systems, two pumps in tandem are used for circulation of water between collector bank & system insulated tank. The pump operation is controlled by OTC (Differential Temperature Controller), which is fitted Inside the Control panel. OTC senses the cold & hot water temperature through two sensors, one fitted at the bottom of the tank to sense cold water temperature & the other fitted at the top of the last collector of the row in the collector bank, to sense the hot water temperature inside the collectorThe difference in temperature between the two sensor points is the criteria for the operation of the pump that is controlled through DTC. This temperature difference can be set between 0 to 10 deg, C.Solar radiation falling on the collector heats up the water inside the absorber. The temperature of water starts gradually increasing compared to the water temperature inside the tank. When this temperature difference between the sensor points reaches the preset temperature difference in DTC, the pump is switched "ON". This will result in entry of cold-water form the system-insulated tank into the collector bank & discharge of hot water from the collector bank to the system insulated tank.The sensor fitted at the collector will sense the temperature of cold water entering into the collector & puts "OFF" the pump when this temperature difference between the sensor points falls below the preset temperature difference in DTC.The process of switching ON & QFF of the pump & circulation of water continues till the end of the day. By the end of the day, the entire quantity of water in the tank reaches the system-designed temperature, provided the radiation level is at minimum of 800 watts per sq.mtr. Industrial Flat Plate Solar Thermal Water Heater https://www.prathamsales.co.in/industrial-flat-plate-solar-thermal-water-heater.htm https://www.prathamsales.co.in/industrial-flat-plate-solar-thermal-water-heater.htm Tue, 04 Dec 2018 00:00:00 +0530 There are two types of solar water heating systems, based on type of circulation: Thermosyphon Forced circulation All domestic and industrial systems upto 4000 LPD (liters per day) 60 deg.C,; works on the principle of thermosyphon. Industrial systems beyond 4000 LPD to any capacity will work on forced circulation principle.Thermosyphon system:The system works on a principle called "THERMOSYPHON" (Natural circulation).Due to density difference between the cold & hot Water, the lighter hot water flows up into the tank and the heavier cold water enters the collector.Solar radiation incident on the collector panels heats the absorber. This heat is transferred to the water contained in the absorber & becomes less dense than the water in the storage tank. Hot water starts rising and settles at the top of the storage tank. Simultaneously cold water descends to the collector absorber tubes, gets heated up and the cycle repeats.The circulation in the system during the heating process is purely due to the difference of density only. There is no other mechanical moving part, hence the system reliability is very high.At the end of the day when radiation is zero (after dark / sun set) the collector will contain heavier cold water and the tank will have lighter hot water. This will ensure that there will be no circulation during night & hence no conduction losses on account of this.The hot water storage tank is well insulated to retain the hot water temperature and to minimize the overnight temperature drop / heat losses.The Sacrificial Anode (Only for SS tank) prevents the tank from galvanic corrosion. For the monsoon / cloudy days the system is-fitted with Electrical back up heater with thermostat.Forced circulation system:In forced circulation systems, two pumps in tandem are used for circulation of water between collector bank & system insulated tank. The pump operation is controlled by OTC (Differential Temperature Controller), which is fitted Inside the Control panel. OTC senses the cold & hot water temperature through two sensors, one fitted at the bottom of the tank to sense cold water temperature & the other fitted at the top of the last collector of the row in the collector bank, to sense the hot water temperature inside the collectorThe difference in temperature between the two sensor points is the criteria for the operation of the pump that is controlled through DTC. This temperature difference can be set between 0 to 10 deg, C.Solar radiation falling on the collector heats up the water inside the absorber. The temperature of water starts gradually increasing compared to the water temperature inside the tank. When this temperature difference between the sensor points reaches the preset temperature difference in DTC, the pump is switched "ON". This will result in entry of cold-water form the system-insulated tank into the collector bank & discharge of hot water from the collector bank to the system insulated tank.The sensor fitted at the collector will sense the temperature of cold water entering into the collector & puts "OFF" the pump when this temperature difference between the sensor points falls below the preset temperature difference in DTC.The process of switching ON & QFF of the pump & circulation of water continues till the end of the day. By the end of the day, the entire quantity of water in the tank reaches the system-designed temperature, provided the radiation level is at minimum of 800 watts per sq.mtr. Solar Photo Voltaic Modules https://www.prathamsales.co.in/solar-photo-voltaic-modules.htm https://www.prathamsales.co.in/solar-photo-voltaic-modules.htm Tue, 04 Dec 2018 00:00:00 +0530 Metal Scraps https://www.prathamsales.co.in/metal-scraps.htm https://www.prathamsales.co.in/metal-scraps.htm Tue, 04 Dec 2018 00:00:00 +0530 Solar Pumping Systems https://www.prathamsales.co.in/solar-pumping-systems.htm https://www.prathamsales.co.in/solar-pumping-systems.htm Tue, 04 Dec 2018 00:00:00 +0530 Solar Street Lights https://www.prathamsales.co.in/solar-street-lights.htm https://www.prathamsales.co.in/solar-street-lights.htm Tue, 04 Dec 2018 00:00:00 +0530 Solar Lanterns https://www.prathamsales.co.in/solar-lanterns.htm https://www.prathamsales.co.in/solar-lanterns.htm Tue, 04 Dec 2018 00:00:00 +0530 Solar Thermal Water Heaters https://www.prathamsales.co.in/solar-thermal-water-heaters.htm https://www.prathamsales.co.in/solar-thermal-water-heaters.htm Tue, 04 Dec 2018 00:00:00 +0530 Solar Thermal Cookers https://www.prathamsales.co.in/solar-thermal-cookers.htm https://www.prathamsales.co.in/solar-thermal-cookers.htm Tue, 04 Dec 2018 00:00:00 +0530 Railway Metal Scrap https://www.prathamsales.co.in/railway-metal-scrap.htm https://www.prathamsales.co.in/railway-metal-scrap.htm Thu, 20 Dec 2018 00:00:00 +0530 We have 4000 Tons Used Railway Scrap. We Want 12 Crores Bank Guarantee On It. Material Will Delivers On Any Station Train Yard. Zinc Ingot https://www.prathamsales.co.in/zinc-ingot.htm https://www.prathamsales.co.in/zinc-ingot.htm Thu, 20 Dec 2018 00:00:00 +0530 We have 50 Tones Zinc Ingot Material Available in Delhi. We Will Provide 50-100 Tons Zinc Ingot per Month.