Gestra Products Technical - Control And Power

DISCOCHECK ® Dual-Plate Check Valves BB
Short overall length according to DIN EN 558-1, table 11, series 16
(=^ DIN 3202, part 3, series K3)
44
Ø D
Ø D
L
80°
DN 50 – 125 mm
L
80°
DN 150 – 500 mm
DN 600 – 1200 only in grey cast iron
A
A
Application
For liquids, gases, vapours. In heating, air-conditioning, water-supply and cooling installations, steam and condensate
systems, oil pipelines and natural gas lines.
For use with sea water, in sewage works, downstream of fans and compressors.
For drinking water: with lining, and for sea water with rubber lining.
With adjustable dampers for installations with waterhammer problems.
Metal-to-metal or soft seat (ePDM, FPM).
Materials
Design Part designation
Pressure/Temperature Ratings with metal-to-metal seat
Nominal size EN ASTM
DN reference equivalent 1)
Grey cast iron Body 150 – 1200 eN-JL 1040 A 126 Class A
(BB ... G) Dual plate 150 – 1200 eN-JS 1030 A 536 60-40-18
Carbon steel Body 100 + 125 1.0460 A 105
(BB ... C) Body 150 – 500 1.0619 A 216 WCB
Dual plate 100 + 125 1.4006 A 182 F6
Dual plate 150 – 500 1.0619 A 216 WCB
Stainless steel Body 50 – 125 1.4404 A 182 F 316 L
Body 150 – 500 1.4408 A 351 CF 8 M
Dual plate 50 – 125 1.4404 A 182 F 316 L
Dual plate 150 – 500 1.4408 A 351 CF 8 M
1) Physical and chemical properties comply with EN grade.
Max. service pressure [bar]
Design Type PN at temperature [°C] 2)
Grey cast iron
down to –10 °C
at nominal
pressure
Carbon steel
down to –10 °C
at nominal
pressure
Stainless steel
down to
–200 °C
at nominal
pressure
20 100 150 200 250 300 350 400 450 500 550
BB 11 G / 21 G 6 6 6 5.4 4.8 4.2 3.6 – – – – –
12 G / 22 G 10 10 10 9.0 8.0 7.0 6.0 – – – – –
14 G / 24 G 16 16 16 14.4 12.8 11.2 9.6 – – – – –
BB 12 C / 22 C 10 10 10 10 9.6 8.9 7.6 7.1 6.7 6.4 – –
14 C / 24 C 16 16 16 16 15.3 14.2 12.1 11.4 10.7 10.3 – –
15 C / 25 C 25 25 25 25 23.9 22.2 18.9 17.8 16.7 16.1 – –
16 C / 26 C 40 40 40 40 38.2 35.6 30.2 28.4 26.7 25.8 – –
17 C 63 63 58.5 54.6 47.6 44.8 40.6 37.8 36.4 – – –
18 C 100 100 93.3 86.7 75.6 71.1 64.4 60 57.8 – – –
19 C 160 160 149.3 138.7 121 113.8 103 96 92.5 – – –
BB 12 A / 22 A 10 10 9.8 9.1 8.5 8.1 7.8 7.5 7.3 7.2 7 6.9
14 A / 24 A 16 16 15.6 14.6 13.7 13 12.4 12 11.7 11.4 11.2 11.1
15 A / 25 A 25 25 24.4 22.8 21.3 20.3 19.4 18.8 18.2 17.9 17.6 17.3
16 A / 26 A 40 40 39.1 36.4 34.1 32.5 31.1 30 29.2 28.6 28.1 27.7
17 A 63 63 61.6 57.4 53.8 51.2 49 47.3 45.9 45.1 44.2 43.7
18 A 100 100 93.3 86.7 82.2 77.8 74.2 71.6 69.3 67.6 66.2 63.1
19 A 160 160 149.3 138.7 131.5 124.5 118.7 114.6 110.9 108.2 105.9 101.0
2 ) For temperatures above +300 °C special springs of Inconel X 750 are required.
BB 12A-18A DN 50 – 125 applicable up to max. 500 °C.
If PN > 40 ask for corresponding data sheets.
If DN > 500 and made from grey cast iron ask for corresponding data sheets.