The range of single acting cylinder, spring return pipeline valves is designed for high speed actuation from standard pneumatic lines, and are offered in sizes NW10, 16, 25, 40 and 50. They are available with aluminium or stainless steel bodies with either O-ring (shaft seal Aluminium only) or bellows seal.
The valves are designed for long life duties, with a MTTF of 5000000 cycles for both bellows and ‘O’ ring sealed versions providing long intervals between services.
|Valve actuation type||Single acting, pneumatically opened, spring closed|
|Pressure range||1 x 10-9 to 2100 mbar|
|8 x 10-10 to 1575 Torr|
|Max pressure differential|
|Opening||1000 mbar / 750 Torr|
|Closing||2100 mbar / 1575 Torr|
|Leak rate||< 1 x 10-9 mbar ls- 1|
|< 8 x 10-10 Torr ls- 1|
|Pneumatic connector||Rp 1/8 (1/8 inch BSP) *|
|Pneumatic operating pressure||2.8 to 4.2 bar / 41 to 61 psi|
|Electrical indicator||Single microswitch ‡|
|Microswitch electrical rating||24 V, 1.5 A a.c. or d.c.|
|Max cycle frequency||900 h-1|
|Bellows reliability, MTTF||5000000 cycles|
|Ambient operating temp||5 - 100 °C|
|Maximum baking temp||100 °C|
|PVPKS||AISI304 stainless steel|
|Bellows||AISI316L stainless steel|
|Molecular conductance (ls-1)||Right angled|
‡ Twin microswitch versions are available on request.
|Time to open (ms)*||Time to close (ms)*|