Samson 33-1, Монтаж и эксплуатация

Страница: 17 / 56

EB 2551-1 EN 3-5
Design and principle of operation
Table 3-1: Technical data · All pressures in bar (gauge)
Valve size DN 65 DN 80 DN 100 DN 125 DN 150 DN 200
2)
DN 250
2)
Pressure rating PN 16, 25 or 40
Max. perm. temperature 150 °C
1)
Set point range (continuously
adjustable)
1 to 10.5 bar
Minimum differential
pressure Δp
min
0.4 bar 0.5 bar 0.6 bar
Max. perm. differential
pressure ∆p
16 bar 12 bar 10 bar
Max. permissible upstream
pressure p
1
25 bar
Compliance
1)
Valve body made of cast iron (EN-GJL-250), DN 125 to 250: max. 130 °C, taking into account the
material table in DIN 4747-1 for the use of the regulator in hot-water district heating networks.
2)
DN 200 and 250 as well as set point range 1 to 16 bar (not typetested) available on request. It is
not possible to type test valves in DN 200 and 250 since the test specification only applies to
K
VS
380 at the maximum. However, their design and function are identical to those of the typetested
valve sizes.
Table 3-2: K
VS
coefficients and x
FZ
values · Terms for noise level calculation according to
VDMA 24422 (edition 1.89)
Valve size DN 65 DN 80 DN 100 DN 125 DN 150 DN 200 DN 250
K
VS
coefficient 50 80 125 190 280 420 500
Value at K
VS
0.3
1)
1.6 1.7 2.0 2.4 3.0 5.0
x
FZ
value 0.40 0.35 0.30
1)
Despite installing a strainer upstream of the regulator, dirt particles may impair the valve shut-off
depending on the size of the strainer mesh. On using the SAMSON Type 2 NI Strainer, the
maximum leakage rate may correspond to the specified value at K
VS
0.3 due to the clogging up of
the valve. This value is then significant on sizing the safety valve or safety excess pressure valve in
the plant.
Dimensions and weights
Table 3-4 provides a summary of the dimen-
sions and weights. The lengths and heights
in the dimensional drawing are shown on
page 3-7.