Jafar 4493SA Manuale operativo - Pagina 3

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Jafar 4493SA Manuale operativo

1. INTENDED USE

Product Number 4493, 4493SA eccentric butterfly valves are intended for potable water supply systems, sanitary
sewage systems and (if approved by the manufacturer) industrial media systems. Each valve can be installed in
overground and underground pipelines as an integral in-line part of the piping. The butterfly valves are used to
shut off and regulate the flow of the medium using a part-turn gearbox, electric actuator or a multi-turn actuator
unit with a part-turn gearbox. They are recommended as shut-off valves for open or closed position. Additionally
they can be used as flow control valves for opening angle range 15°÷90°. The selected actuator unit must ensure
a stable closure actuation angle within 0° - 90° and the correct operating torque value, see Table 1.

2. TECHNICAL DESCRIPTION

•
Production and acceptance according to EN 1074-2 (Valves for water supply. Fitness for purpose
requirements and appropriate verification tests. Isolating valves) and EN 12266-1 (Industrial valves. Testing
of valves).
•
100% of each valve is leak tested.
•
4493, 4493SA butterfly valves are tight in both directions.
•
The temperature range of the valve application is from 0C to 70C (they can be used in other temperatures
as agreed with the manufacturer).
•
Nominal pressure ratings: 1.0 MPa; 1.6 MPa.
•
Nominal diameter range offered: DN200÷ DN2000 [mm].
•
Hydraulic performance: maximum liquid medium flow rate: PS10 max. 3[m/s]; PS16 max. 4[m/s];
•
Minimum driving torques necessary to operate the valve (without actuator element) are given below:
DN
[mm]
200
250
300
350
400
450
500
600
700
800
900
1000
1200
1400
1600
1800
2000
Table 1. Driving torque
OPERATING MANUAL
ISO
Torque value on valve shaft required for
5211
closing or opening (Nm)
Δp
F10
F10
F10
F14
F14
F14
F16
F16
F25
F25
F25
F25
F30
F35
F40
F40
F48
07-2022
 Pa
430
500
860
1,300
1,400
2,300
2,600
3,700
5,500
7,600
9,600
14,500
22,900
42,500
54,600
135,000
150,000
6 Pa
970
1,100
1,200
1,891
2,400
3,300
3,800
6,300
8,700
11,300
14,400
20,200
37,200
67,800
118,400
202,500
225,000
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