OPERATION AND MAINTENANCE MANUAL
12-2015
3
1 TECHNICAL DESCRIPTION
1.1 PRODUCT NAME AND FEATURES
The subject of this O&MM is:
Break-away fire hydrant with double closure
- With additional protection against flow in the form of ball valve;
placed below poppet
- With automatic water drainage activated by medium flow stoppage;
- With poppet (closure) embedded in 100% pure elastomer;
- Internal parts may be replaced without cutting off flow;
- Valve body with saddle tees may be rotated within the range from 0
o
to 360
o
.
1.2 PURPOSE
Break-away fire hydrants TYPE 8003 with double closure are intended for fire protection systems, for
chemically neutral pure water, free of impurities and for industrial systems. For use on above-ground
installations on pipelines laid horizontally below the freezing zone.
1.3 TECHNICAL SPECIFICATION
Break-away fire hydrants with closure are intended for transport of potable water and industrial
water at temperatures from +1
°
C to +50
°
C.
- Available diameters (dimensions)
DN80-DN100 [mm]
- Maximum medium flow rate:
- liquid up to 4 [m/s]
- driving torque at opening start and closing end are listed below:
DN [mm]
80
100
Mmax [Nm]
80
80
- equipment control: closing direction in the standard version of hydrant:
clockwise closing sense of rotation.
The closing sense of rotation can be opposite on special order.
-
connection flanges are manufactured in accordance with PN-EN 1092-2:1999
with the dimensions adequate to the relevant nominal pressure of 1.6 MPa.
-
Hydrant's efficiency with nominal pressure 0.2 MPa is:
10 dm
3
/s – above ground DN80
15 dm
3
/s – above ground DN100
In accordance with PN-B-02863: 1997 "Fire water supply"
-
Key for controlling valves and taps PN-89/M-74088
-
Design in accordance with PN-EN 14384:2009 TYPE C
-
Saddle tees B 75 per DIN 14318: 1985
-
Saddle tees A 110 per DIN 14319: 1985
2 STRUCTURE
2.1 HYDRANT DESIGN DESCRIPTION
The fire hydrants are made in the form of column with internal structure to enable drawing water from
pipeline and a header with saddle tees for attachment of fire hoses. In the lower part of the hydrant there is a cast-
iron valve chamber with a poppet acting as closing element and a drainage device. The chamber housing is
connected to the ball's (ball return valve) valve chamber finished with a connection flange for installing the
hydrant on the pipeline. Top part of the hydrant is a cast-iron body with outlet openings with saddle tees. The top
body also has a driving element on the end of bolt used for transferring rotational movement to the hydrant's
poppet via distance pipe. The top body of a break-away fire hydrant is connected to the underground part with
