Guru Gobind Singh Indraprastha University Tender

ITEM DESCRIPTION

Product Vacuum Hot press is utilized to compact homogenous powders into a high-density pellet for analysis. To ensure ease of use, the process should be automatic and fully programmable rendering it ideal for repetitive compaction analytical techniques. Application Preparation of high-density pellets for thermoelectric device applications. Mounting Type Floor mounting Working principle Pressure force and temperature Output Compacted pellets Maximum operating temperature 1200°C (with temperature range 100K to 1200°C ±5°C) Temperature measuring arrangement Thermocouple K or S (NABL calibrated) Load 15 tons., with calibration certificates of Gauges Feed materials Polymer, metals, semimetals, semiconductors and ceramics Pellet size 20 mm diameter and 6 mm thickness or more Atmosphere Inert with argon gas purging Vacuum 10-3 Torr or Better Type of load apply Hydraulic power pack with motor operating pressure in the range of 15 tons or better Maximum fill height in die 15 mm or more Hot zone volume 150 mm dia. x 150 mm height or more Shell Construction The fabrication should be of high-quality stainless-steel body structure using double wall construction, reinforced with proper stiffeners, and finished. Insulation Water cooling (Water circulation should be provided in all sides) Skin Temperature A double wall structure should be implemented, along with specialized chilled water circulation system, to maintain the skin temperature just above or suitable ambient levels Vacuum chamber material Suitable INCONEL (High density Isostatic pressuring graphite; density greater than 1.88 g/cc) Fittings for controlled atmosphere for noble gases along with suitable adapter/display A stainless steel (SS3l6) door should be equipped with water cooling arrangement and Whiton 'o' ring and connected to vacuum and suitable to purging multiple gases N2, Ar, Air, etc. Multiple ports in the fittings The SS door fittings should include multiples ports at the both the end: Connection to evacuation, gas inlet, gas outlet and pressure gauge, all should be equipped with necessary valves and control. All fitting should be quality make with metal-to-metal interlocking. Heating elements APM Kanthal / Graphite etc. Top Ram Moving Down Loading type Vertical down Day light (distance between punch and die) 150 mm Pressure Gauge Quality make Pressure Gauge digital/analog with calibration certificate Pressure accuracy ± 1% or better accuracy Pressure holding time 1-120min/or more Pressure mode Automatic programable Die materials • High grade Graphite die for higher temperature (up to 1200 °C) • Stainless steel/Tungsten carbide for low temperature (below 500 °C) Water chiller A suitable water chiller with circulation capacity of 50 liters per minutes or greater should be provide. Moisture controlled cooling to prevent the insulation. Protection and Safety Over temperature and over current protection feature should be provided