KSB ECOLINE FYC, Operating Manual

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4 Valve Description
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4.3.1.3 Design details
Design
▪ Globe valve to BS 1873
▪
Tested to API 598
▪
Body made of cast steel or stainless steel
▪ Bolted bonnet
▪ Outside screw
▪ Rotating stem
▪
Non-rotating stem (8'' and 10'' Class 300/600)
▪ Rising stem
▪ Stem with burnished shank
▪ Solid flat disc (plug-type valve disc for 8" and 10" Class 600)
▪
Stem sealed by gland packing
▪ Two-piece self-aligning gland follower
▪ Stem nut made of nickel steel
▪ Valve seat made of wear-resistant and corrosion-proof materials
▪
Back seat
▪ Hardened back seat bush
▪ Die-moulded graphite gland packing, packing end rings made of braided
graphite
▪
Stainless steel/graphite gaskets
▪ Outside yoke
▪ Yoke head suitable for mounting electric and pneumatic actuators (DIN ISO 5210)
▪ The valves satisfy the safety requirements of Annex I of the European Pressure
Equipment Directive 97/23/EC (PED) for fluids in Groups 1 and 2.
▪ The valves do not have a potential internal source of ignition and can be used in
potentially explosive atmospheres, Group II, category 2 (zones 1+21) and
category 3 (zones 2+22) to ATEX 2014/34/EU.
Variants
▪ Position indicator
▪
Limit switch(es)
▪
Locking device
▪ Throttling plug
▪ Hard-faced back seat
▪ Drain plug
▪
Bypass
▪ Version in compliance with TA-Luft (German Clean Air Act) to VDI 2440 for
temperatures up to 400 °C
▪ Version with free stem end and top flange to ISO 5210
▪
Gearboxes
▪ Electric actuators
▪ Non-destructive testing, e.g. radiographic testing
▪ Inspections to technical codes such as AD2000 or IBR
▪
NACE standard
▪ Other flanged end designs or butt weld ends to ASME B16.25
▪ Larger nominal sizes and other variants on request