short dated tender - bids are invited for various safety valves complete psv-103 with spares as per following specifications:- 1. tag no: psv-103 2. service: gas exit 1.32 e-1 4. type of valve: conventional 5. bonnet type: closed bonnet balanced bellow 6. lift: full 7. nozzle: full 8. cap: screwed/ bolted: bolted 9. lever plain /packed: na 10. test gag: yes 11. blowdown ring: required, moc: aisi 316 ss 12. cause for pressure rise: blocked discharge 13. calculation code: api 520 / asme sec viii 14. basis for sizing: blocked discharge 15. inlet size & rating: 4 150# rf 16. outlet size & rating: 6 150# rf 17. body & bonnet: astm216 gr. wcb 18. nozzle: aisi ss 316 stellited 19. disc: aisi ss 316 - stellited 20. spring material: carbon steel (vendor may offer best spring material as per mentioned service, fluid, pressure and temperature. vendor to confirm its suitability). 21. cap: astm216 gr. wcb 22. fluid / fluid state: converted gas 23. operating pressure: 0.8 kg/cm2 g 24. set pressure: 4 kg/cm2 g 25. % over pressure: 10% 26. % accumulation: 10 % (vendor to specify) 27. % blowdown required: 7-10% (vendor to specify) 28. back pressure: 01 kg/cm2g 29. operating temperature: 170 deg c 30. exhaust flow rate: 14570 nm3/hr 31. mol. wt.: 15.8 32. specific heat ratio: 1.35 33. calculated orifice area: existing is 5.614 cm2 sq.in (vendor t total quantity :