OPERATION AND MAINTENANCE MANUAL
01-2016
10
Caution! It is prohibited to open this type of hydrant with a closed shutoff gate valve because the poppet
sliding down must be able to push a water column in the direction opposite to the flow direction during the
first phase of its movement.
2.2 MATERIALS TYPE 8851
List of basic materials used for the construction of an underground hydrant TYPE 8851
see table
Item Part name
Material
Reference standard
1
Main body
Cast-iron, EN-GJS 400-15
EN-GJS500-7
PN-EN1563: 2012
2
Ball chamber
Cast-iron, EN-GJS 400-15
EN-GJS500-7
PN-EN1563: 2012
3
Column
Cast-iron, EN-GJS 400-15
EN-GJS500-7
Steel 1.0254
Stainless steel 1.4301
PN-EN1563: 2012
PN-EN 1,503-3:2003
PN-EN 10088-1:2014
4
Cover
Cast-iron, EN-GJS 400-15
EN-GJS500-7
PN-EN1563: 2012
5
Poppet
Cast-iron, EN-GJS 400-15
EN-GJS500-7
EPDM
PN-EN1563:2012
PN-ISO1629:2005
6
Cap
Cast-iron, EN-GJS 400-15
EN-GJS500-7
PN-EN1563: 2012
7
Stem
Stainless steel 1.4021
PN-EN 10088-1: 2014
8
Spindle
Stainless steel 1.4301
PN-EN 10088-1:2014
9
Tooth socket
Cast-iron, EN-GJS 400-15
EN-GJS500-7
PN-EN1563: 2012
10
Gasket
EPDM
PN-ISO 1629:2005
11
Outlet seal
EPDM
PN-ISO 1629:2005
12
Deflector
EPDM
PN-ISO 1629:2005
13
Stopper
Brass
PN-EN 1982:2010
14
Stem nut
Brass
PN-EN 1982:2010
15
O-ring
EPDM
PN-ISO 1629:2005
16
Bolt
Steel St3S/Zn5
Stainless steel, A2
PN-EN ISO 4017: 2011
PN-EN ISO 4762: 2006
17
Nut
Steel St3S/Zn5
Stainless steel, A4
PN-EN ISO 4032: 2013
18
Drainage
Polypropylene PP
PN-EN ISO 1873-1:2000
19
Seat
Brass
PN-EN 1982:2010
