KSB ECOLINE FYC, Operating Manual

Page: 28 / 100

4 Valve Description
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4.3.4.3 Design details
Design
▪ Globe valve to ASME B16.34
▪
Tested to API 598
▪
Compact design to API 603
▪ Valve made of corrosion-resistant materials
▪ Body made of stainless steel
▪ Bolted bonnet
▪
Outside screw
▪ Rotating stem
▪ Stem with burnished shank
▪ Stem nut made of nickel steel
▪
Rising handwheel
▪ Outside yoke
▪ Yoke head suitable for mounting electric and pneumatic actuators (DIN ISO 5210)
▪ Fully confined bonnet gasket
▪
Stem sealed by gland packing
▪ Two-piece self-aligning gland follower
▪ Die-moulded graphite gland packing, packing end rings made of braided
graphite
▪
Stainless steel/graphite gaskets
▪ Back seat
▪ Integrated seat ring
▪ Minimum wall thickness as per ASME B16.34
▪
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
▪
Hard-faced back seat
▪
Hard-faced sealing surface (single or double)
▪ PTFE packing
▪ PTFE gasket
▪ Drain plug
▪
Locking device
▪ Position indicator
▪ Limit switches
▪ Grease-free version
▪
Version with free stem end and top flange to ISO 5210
▪ Gearboxes
▪ Electric actuators
▪ Non-destructive testing, e.g. radiographic testing
▪
NACE standard
▪ Other flange designs
▪ Larger nominal sizes and other variants on request