trunnion ball valve size: 1/2"-40" material: steel Certification:ISO9001:2000,ISO14001,API6D,CE0036 Guarantee: 18months tunnion ball valvesize: 1/2"-42"material: steelCertification:ISO9001:2000,ISO14001,API6D,CE0036Guarantee: 18months; OEM offerPressure rating:150LB -2500LBSuitable medium: water, oil, gas.... STANDARDS:Design and Manufacture:ASME B 16.34 and API 6DForged steel check valve: API ...