Features and benefits

● Exclusive Memoryseal™ seats compensate automatically for wear and fluctuations of pressure and temperature.

● Multiple solid cup and cone type PTFE stem seal or graphite packing.

● Two-piece self-aligning packing flange and gland.

● PTFE TA-Luft certified live-loaded packing available.

● Stem guides reduce side thrust.

● Long cycle life.

● Low, uniform torques.

● Blowout-proof stem.

● Live-loaded thrust washer prevents galling and provides secondary stem seal.

● Fully enclosed spiral wound graphite filled stainless body gasket.

● Meets ASME B16.5, B16.10 and B16.34, API 608, API 598, API 607 Rev. 5/ISO 10497.

● ASME Section 8 mid flanges and bolting eliminates weak center section.

● UL approved, SB-150/300 NPS 2–12 (DN 50–300).

● AGA & CGA approved, SB-150 Full Port NPS 2–8 (DN 50–200) - optional.

● Face-to-face dimensions meet ASME B16.10 long pattern or short pattern.

● Locking devices standard on lever operated valves(Ball Valves).

● Trunnion-mounted ball on larger valves allows the ball to float in case of fire and shutoff on the secondary metal seat.

● Cavity fillers available for NPS 1⁄2–12 (DN 15–300).

● Gear actuators standard: SB-150/300 NPS 8–24 (DN 200–600) full port and NPS 10–24 (DN 250–600) regular port, SB-600 NPS 6–12 (DN 150–300) full port and NPS 8–12 (DN 200–300) regular port. 

link:http://www.velan.com/velan/en/products/1/50?product_id=84