KSB RDL - Page 20

RDL
19
5.6.2 Recommendation for discharge piping
Mounting of discharge piping should consider following items:
a) Should have devices for control of water hammer when the pressure values from liquid return in long pipes exceed the
recommended limits for piping and pump;
b) Junction between discharge piping and pump flange should be made with a concentric reducer, when nominal diameters
are different;
c) Install vent valves to remove the air;
d) Install a discharge valve, just after pump discharge nozzle , in order to adjust of flow and pumping pressure, or prevent
driver overload;
e) Check valve, when installed should be placed between the pump and the discharge valve. This location is preferable in
relation to item d;
f) Expansion joints with tie bolts should be considered to absorb system stresses;
g) Safety valves or relief devices and other operation valves should be installed when necessary;
h) Same recommendations a, b, f, g i, l, m, regarding suction piping.
5.6.3 Auxiliary connections
The dimensions and locations of the auxiliary connections (sealing liquid, flushing liquid etc.) are indicated on the G.A. drawing
and below.
These connections are required for proper functioning of the pump and are therefore of vital importance!
Modifications are only permitted after consulting KSB (see 2.7)!
Description of piping and auxiliary connection
Up to RDL 150-500
From RDL 200-280 up to
400-850
1M Manometer R ½” R ½”
3M Vacuometer R ½” R ½”
6ES Priming R ½” R ¾”
6D Drain R ½” R ¾”
10E Inlet for water of external source R ½” R ½”
8D Leakage R ¾” R ¾”
From RDL 500-510 up to
600-830
From RDL 700-590 up to
800-970
1M Manometer R ½” R ½”
3M Vacuometer R ½” R ½”
6ES Priming R 1” R 1 ½”
6D Drain R 1” R 1 ½”
10E Inlet for water of external source R 1” R 1 ½”
8D Leakage R 1” R 1”
Fig.19 – Standard piping and auxiliary connection
Note:
1) Suction piping for liquid of external source should have valve and sight glass to control and observe flow.
2) For pumps with mechanical seal other connections can be installed on the seal gland. In this case, complementary
instructions will follow.
3) Optionally connections with NPT can be supplied.