supply of 25 mm bronze horizontal check valve25 mm bronze horizontal check valve,25 mm bronze horizontal check valve having screwed female ends conforming to is 554/bs 21/ iso 7 with following material specification: 1. body and disc should be made of bronze conforming to is 318 gr.ltb 2 ; 2. bonnet should be made of brass/forged brass c onforming to is 318 gr.ltb 2/is 6912 gr.flb ; 3. o ring should be made of nitrile rubber conforming to is 5192-1 ; make: zoloto/leader/gm or its equivalent ; note: sample to be approved before bulk supply duly providing the valid work test certificate issued by oem. [ warranty period: 30 months after the date of delivery ] ]