Jafar 2911 Manual de instrucciones - Página 3

Navegue en línea o descargue pdf Manual de instrucciones para Unidad de control Jafar 2911. Jafar 2911 8 páginas. Flanged gate valves with soft seals
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1. INTENDED USE

The flanged gate valves with soft seals 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 above-ground and
underground pipelines as an integral inline part of the piping.
The gate valves are two-position valves which can only be set fully open or fully closed, and not intended for
operation as control or damper valves.

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 metallic
valves).
100% of each valve is leak tested.
Application temperature range: -10°C to +70°C.
Nominal diameter range: DN40 to DN1200 [mm].
Hydraulic performance: maximum medium flow rate for liquids 4 [m/s] and 30 [m/s] for gases.
Valve switching driving torque:
Number of
Number of
Number of
Number of
DN [mm]
DN [mm]
DN [mm]
DN [mm]
turns
turns
turns
turns
40
11
50
13.5
65
14
80
17
100
21
125
26
150
26
200
34.5
250
42.5
300
51
Valve control mode: the standard version of the gate valve has the clockwise closing sense of rotation. The
closing sense of rotation can be opposite on special order.
Connection flanges are manufactured in accordance with EN 1092-2 (Flanges and their joints. Circular flanges
for pipes, valves, fittings and accessories, PN designated. Cast iron flanges):
with the sizes compliant with the nominal pressure values.
The installation (face to face) length and its tolerance are per EN 558 (Industrial valves. Face-to-face and
centre-to-face dimensions of metal valves for use in flanged pipe systems. PN and Class designated valves):
Series 14, P/N 2111 (DN32-DN1200), 2911 (DN40-DN1200)
Series 15, P/N 2002 (DN32-DN1200), 2902 (DN40-DN1200)
Nominal pressure ratings: 0.6 MPa, 1.0 MPa, 1.6 MPa, and 2.5 MPa
The gate valves with soft seals a smooth walled bore, a non-ring spindle, and an o-ring spindle seal installed
in a head-type valve cover. The spindle is guided by a bushing in the valve cover neck and a sealing plug. The
spindle seal is effected by the plug sealing assembly, which is a system of O-rings. The gate valve closure is
a cast iron wedge completely coated with rubber and featuring sliding inserts as motion bearings. The spindle
can be controlled with an electric drive unit . The gate valves nominally sized from DN350 to DN1200 feature
the spindle seal in a separate valve head located on the valve cover with longitudinal bearings that support the
spindle flange. The standard valves above DN700 and up to DN1200 are operated with an angular gearbox.
OPERATING MANUAL
M
[Nm]
max
25
50
60
96
108
200
06-2021
Number of
Number of
Number of
Number of
DN
DN [mm]
DN
DN
[mm]
[mm]
[mm]
turns
turns
turns
turns
60
350
400
58
450
65
500
63
600
77
700
52
800
52
900
58
1000
65
1200
78
M
[Nm]
max
264
280
300
350
420
636
768
864
960
1920
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