KSB ECOLINE FYC, Operating Manual

Page: 39 / 100

4 Valve Description
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4.5.1.3 Design details
Design
▪ Gate valve to API 600-2009
▪
Tested to API 598
▪
Body made of cast steel or stainless steel
▪ Flexible wedge
▪ Bolted bonnet
▪ Non-rotating stem
▪
Non-rising handwheel
▪ 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
▪ Stem with burnished shank
▪ Stem nut made of nickel steel
▪
Outside screw
▪ Sealing surfaces made of wear and corrosion resistant materials
▪ Back seat
▪ Hardened back seat bush
▪
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
▪ Limit switch(es)
▪ Locking device
▪
Stem protecting tube
▪
Stem protecting tube with position indicator
▪ Drain plug
▪ Hard-faced back seat
▪ Pressure relief arrangement
▪
Bypass
▪ Version with free stem end and top flange to ISO 5210
▪ Gearboxes
▪ Electric actuators
▪
Version in compliance with TA-Luft (German Clean Air Act) to VDI 2440 for
temperatures up to 400 °C
▪ Non-destructive testing, e.g. radiographic testing
▪ Inspections to technical codes such as AD2000 or IBR
▪
Gate valve to API 600-2015
▪ NACE standard
▪ Other flanged end designs or butt weld ends to ASME B16.25
▪ Larger nominal sizes and other variants on request