Jafar 2909 Посібник з експлуатації та технічного обслуговування - Сторінка 4
Переглянути онлайн або завантажити pdf Посібник з експлуатації та технічного обслуговування для Блок управління Jafar 2909. Jafar 2909 10 сторінок. Metal seated gland packed flanged gate valves
Друкувати сторінку
nut on the wedge lug. The top section of the valve cover is the gland packing unit which keeps the flow control
head sealed. The gate valve stem is a cylindrical shaft tipped with a trapezoid thread at the bottom, which is the
drive section, whereas the top tip is designed to match the control element. The valve cover is bolted tight to the
valve body. The valve cover to body seal is an asbestos-free formed gasket. All inner and outer cast-iron surfaces
of the valve are polyvinyl coated. The type 2109 spindle is driven with a hand wheel, and the type 2909 valve is
switched with a drive actuator.
2.2 MATERIALS
The table below lists the structural materials of the metal seated gland packed wedge gate valves with soft
seals.
Item Part designation
1
Body
2
Cover
3
Wedge
4
Packing gland
5
Spindle
6
Gland
7
Spindle nut
Seal
8
9
O-ring seal
10
Handwheel
Valve cover gasket
11
Bolt
12
13
Nut
Material
Spheroidal cast-iron, EN-GJS 400-15,
EN-GJS 500-7
Spheroidal cast-iron, EN-GJS 400-15,
EN-GJS 500-7
Spheroidal cast-iron, EN-GJS 400-15,
EN-GJS 500-7
Spheroidal cast-iron, EN-GJS 400-15,
EN-GJS 500-7
Steel grade 1.4021
Spheroidal cast-iron, EN-GJS 400-15,
EN-GJS 500-7
Spheroidal cast-iron, EN-GJS 400-15,
EN-GJS 500-7
Carbon seal, DN40-DN300: PTFE +
carbon; DN350 DN600
Steel grade 1.4021
Grey cast iron, EN-GJS 250
Asbestos-free carbon gasket, DN40-
DN300; AF300 – DN350-DN600
Steel, 1.0038 – DN40-DN300: Fe/Zn5
– DN350-DN600
Steel, 1.0038 – DN40-DN300: Fe/Zn5
– DN350-DN600
OPERATION AND MAINTENANCE MANUAL
Reference standard
PN-EN 1563: 2012
PN-EN 1563: 2012
PN-EN 1563: 2012
PN-EN 1563: 2012
PN-EN 10088-1: 2014
PN-EN 1563: 2012
PN-EN 1563: 2012
acc. to manufacturer's
Technical Guidelines
PN-EN 10088-1: 2014
PN-EN 1561: 2012
acc. to manufacturer's
Technical Guidelines
PN-EN ISO 4017:2011
PN-EN ISO 4032:2013
12-2015
4