Bellows-Sealed Valve for Switching Service—BY Series - SWAGELOK - #1

Text version of the page

www.swagelok.com Bellows-Sealed Valve for Switching Ser vice BY Ser ies Features �¡ Compact, packless valve switches flow from one line to another. �¡ Torlon® stem guide ensures proper alignment for consistent shutoff performance. �¡ Manual and spring-return and double-acting pneumatic actuators are available. �¡ End connections include 1/4 in. Swagelok® VCR® metal gasket face seal fittings and 1/4 in. Swagelok tube fittings. Other end connections are available; contact your authorized Swagelok sales and service representative for information. Operation With pressure to the miniature springreturn pneumatic actuator, the stem tip seals the upper port, allowing flow through the lower port. When there is no pressure to the actuator, the stem tip seals the lower port, allowing flow through the upper port. Pressure-Temperature Ratings Testing Every BY series valve is factory vacuum tested with helium at room temperature for five seconds to a maximum leak rate of 4 3 10–9 std cm3/s at the seat, envelope, and all seals. Cleaning and Packaging Swagelok BY series switching valves with VCR end connections are processed in accordance with Swagelok Special Cleaning and Packaging (SC-11), MS-06-63, to ensure compliance with product cleanliness requirements stated in ASTM G93 Level C. BY series switching valves with Swagelok tube fitting end connections are processed in accordance with Swagelok Standard Cleaning and Packaging (SC-10), MS0662. Oxygen Service Hazards For more information about hazards and risks of oxygenenriched systems, see the Swagelok Oxygen System Safety technical report, MS-06-13. Valve Ratings Actuator Ratings Pressure psig (bar) Temperature °F (°C) Pressure psig (bar) Temperature °F (°C) Vacuum to 150 (10.3) 0 to 200 (–18 to 93) 65 to 150 (4.5 to 10.3) –10 to 300 (–23 to 148)