Size: NPS2â-24â Rating: Class150-900 LB Material: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel End: RF, RTJ, BW Operation: Operation: Manual, Gear, Pneumatic, Electric Design & Manufacture Standard: API6D, ASME16.34, BS5351 Face to Face: ASME B16.10, API6D End Connection: ASME B16.5, ASME B16.25 Test Standard: API6D, API598 Full port or reduce port Fire safe certified Double block & bleed Emergency sealant injection Cavity pressure self relief Blowout-proof stem Antic-static Optional double piston design