STANDARD VERSION: • Double eccentric operating principle: this construction helps to reduce seat abrasion and actuation torque lower than 50% compared to a centric butterfly valve. • External body material: polypropylene fiber glass reinforced. • Butterfly: PVC-C. • Seal: EPDM. • Working temperature: from 0°C to +80°C. • Working pressure: see diagram. • Application: chemicals and all kinds of fluids compatible with PVC-C and EPDM. • Available range: from DN50 to DN300 PN 10. • Standard flanges: from DN50 to DN300 ISO 7005 PN 10, EN 1092 PN 10, DIN 2501 PN 10, ANSI/ASME B16.5 class 150, BS 1560: 1989, BS 4504, JIS B 2220. • F07 connection as per DIN/ISO 5211.
Flow-pressure loss diagram and Kv nominal coefficient
DN50
DN65
DN80
DN100
DN125
DN150
DN200
DN250
DN300
Kv100
1470
2200
3000
6500
11500
16600
39600
51000
73000
KV100 liters per minute
KV
88,2
132
180
390
690
996
2376
3060
4380
KV cubic meters / hour
Kv is the coefficient, expressed in m3/h (with water at 15°C) causing a pressure loss of 1 bar.
BREAKAWAY TORQUES Nm
SIZE
DN 50
2"
DN 65 2"1/2
DN 80
3"
DN 100
4"
DN 125
5"
DN 150
6"
DN 200
8"
DN 250
10"
DN 300
12"
PN 10 bar
12
18
28
40
50
62
90
110
140
Torque can vary depending on temperature and type of fluid; a safety factor of 1.4 must be applied. Torque can drop on high frequency of operations. The actuator/valve sizing, indicated on the following pages, are based for valves to be used with liquids or gaseous fluids, clean, and for medium temperatures. For further information,or different uses please contact our technical department.
