5 Valve Description
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5.6.1.1 Operating data
Table26: Operating properties
Characteristic Value
EN-GJL-250 EN-GJS-400-18-LT
Nominal pressure PN 6/16 PN 16/25
Nominal size DN 15 - 400 DN 15 - 300
Max. permissible pressure [bar] 16 25
Min. permissible temperature [°C] -10 -10
Max. permissible temperature [°C] +300 +350
Selection as per pressure/temperature ratings (ðSection5.6.1.4,Page34)
5.6.1.2 Fluids handled
▪ High-temperature hot water
▪ Saturated steam
▪ Thermal oil
▪ Liquids and gases not chemically or mechanically aggressive to the valve
materials.
▪ Other fluids on request.
5.6.1.3 Design details
Design
Valves to type series booklet 7125.1
▪ Y-pattern strainer
▪ Screen made of stainless steel
▪ Screen accurately guided in cover and body
▪ Outside confined cover gasket
▪ Drain plug
▪ Size DN 150 and above: additional screen cage made of perforated stainless steel
sheet
▪ Flanges to DIN EN 1092-2 Type 21
▪ Exterior coating: blue,RAL5002
▪ The valves satisfy the safety requirements of AnnexI of the European Pressure
Equipment Directive2014/68/EU (PED) for fluids in Groups1and2.
▪ The valves do not have a potential internal source of ignition and can be used in
potentially explosive atmospheres, GroupII, category2 (zones1+21) and
category3 (zones2+22) to ATEX2014/34/EU.
Variants
▪ Fine screen
▪ High temperature resistant paint, aluminium grey (EN-GJS-400-18-LT only)
▪ Other flange designs (EN-GJS-400-18-LT only)
▪ Certification to customer specification
26) Intermediate temperatures can be derived by linear interpolation.
27) Static load