Jafar 5320 Manual de funcionamiento y mantenimiento - Página 5
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2 DESIGN
2.1 DESCRIPTION OF THE VALVE DESIGN
F.A. JAFAR S.A manufactures the TYPE 5220, 5320 & 5321 water ball valves, with the TYPE 5220 full bore
valves and the TYPE 5320 & 5321 reduced bore valves. The valve body is a welded structure with a free-floating
ball up to DN200 (larger sizes have trunnion balls), an internal compensation system, and a closure seal in the
form of a ball set in a seat, made by two seals. The ball seals are supported with disk springs to ensure continuous
pressure of the seals on the ball, even when the ball valve is operated at varying temperatures, and compensate the
thermal expansion of the valve. The chromium steel spindle, interfaced with the ball, is sealed within the valve
body by o-rings located on the cylindrical surface, and a Teflon seal on the conical surface. A manual control lever
is mounted on the valve spindle and formed as a steel handle coated with a plastic material; another form is a
mechanical drive gear. The turning angle limiter ensures proper positioning of the ball closure in the fully open
and fully closed positions. The ball valve is fully open with the control lever in parallel to the valve centreline, and
fully closed with the control level square to the valve centreline.
Ends:
-
TYPE
5220
&
and PN-EN 1092-2:1999;
- TYPE 5321 welded ends are designed per PN-EN 12627:2002.
2.2 MATERIALS
The tables below list the structural materials of the TYPE 5120, 5121, 5124, 5220, 5320 & 5321 ball valves.
TYPE 5220
Item
Part designation
1
Body
2
Ball
3
Spindle
4
Screw plug
5
Ball seal
6
Turn limiter
7
Spindle seal
8
O-ring
9
10
Retaining ring
11
OPERATION AND MAINTENANCE MANUAL
5320
flanged
ends
Material
Steel grade 1.0582
Steel grade 1.0037
Cast-iron, EN-GJS-400-
15
Steel grade 1.4301
Steel grade 1.4021
Steel grade 1.0037 + Zn
PTFE+C
Steel grade 1.4301
PTFE+C
EPDM, VITON
are
designed
per
Reference standard
PN-EN ISO 3183:2013
PN-EN 10025-2:2007
PN-EN 1563:2012
PN-EN 10088-1: 2014
PN-EN 10088-1: 2014
PN-EN 10025-2:2007
PN-EN ISO 13000-1:2007
PN-EN 10088-1: 2014
PN-EN ISO 13000-1:2007
PN-ISO 1629:2005
PN-81/M-85111
01-2016
PN-EN
1092-1:2013
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