KSB ECOLINE FYC, Operating Manual

Page: 61 / 100

4 Valve Description
61 of 100
4.6.2.2 Fluids handled
▪ Steam
▪
Fluids containing gas
▪ Gas
▪ High-temperature hot water
▪ Feed water
4.6.2.3 Design details
Design
▪ Lift check valve to API 602
▪ Tested to API 598
▪
Body made of forged steel
▪ Bolted cover (Class 800)
▪ Welded cover (Class 1500/2500)
▪ Reduced bore
▪
Solid check disc
▪ Integral seat - ST6 (HF)
▪ Fully confined cover gasket (Class 800)
▪ Spring ensures reliable shut-off
▪
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
▪
Full bore
▪ Butt weld ends
▪ Version in compliance with TA-Luft (German Clean Air Act) to VDI 2440 for
temperatures up to 400 °C
▪
NACE standard
▪ Other threaded ends or butt weld ends to ASME B16.25
▪ Other trims