KROHNE VFM 1091 I Installation And Operating Instructions Manual page 35

Primary head VFS 1000 (I)
Versions and meter sizes
Sandwich design to ... DIN 19205
Flange connections to ...DIN 2501
Groove joint to...
Process and ambient temperature
Materials
SR.NO. DESCRIPTION
1 Housing
2. Vortex shedding body
Seals
a. upto 180 deg C(356deg.F)
3.
b. upto 220deg C(428deg.F)
c. upto 240deg C(464deg.F)
4. Bluff body metal seal
5. Gaskets
Max. allowable operating pressure (primary head) 40 bar (580 psig), optionally upto 100 bar (1450 psig)
Hazardous Duty Versions: FM, CSA, PTB approvals pending.
Error limits
Measuring error (in linear range)
Repeatability (in measuring range)
Temperature Error
D
Pressure loss p
at normal conditions
for air[1.013 bar (14.7psig)/0
o o
F) / r
for water [20 C (68
at operating conditions
for gases and liquid
for saturated steam
ANSI
ANSI B 16.5
DIN 2515
(Optional) ANSI
MATERIAL
Stainless Steel, A351 CF3M (316L)
Stainless Steel, A351 CF8 (304)
Unalloyed Titanium (No.3.7035) as standard
Viton O ring
Kalrez 4079 O ring
Parofluor O ring
C ring Inconel Ni plated
GASKET, STYLE AF-139, NON
ASBESTOS
GASKET, STYLE AF-160, NON
ASBESTOS
GASKET, TEFLON (PTFE)
o o
F) / r
c(32 = 1.29 kg/m(0.081 lbs/ft)]
n
= 998.2 kg/m (63.32 lbs/ft)]
n
Pressure ratings see "Dimensions" Table
(Note operating limits given in DIN 2501 and ANSI B 16.5)
DN 25 to 150
1" to 6"
DN 10S to 200
3/8"S TO 8"
DN 25 TO 150
1" to 6"
see Diagram III
± 1 % of measured value for DN 25 (1") & above
± 2 % of measured value for DN 10S (3/8"S) to DN 20 (3/4")
± 0.5 % of measured value
- 0.025 % of measured value per 10Kelvin (50
REMARKS
Upto size DN100/4''
From DN150/6'' to DN200/8''
Non steam applications
Non steam applications
Steam applications
Once used metal C ring shoul d
not be used again. Tightening
torques for new seals are
M6 = 1.5kg - m
M8 = 2 kg - m
M10 = 5.5 kg - m
Any one as per application
see Diagram I
see Diagram II DP = Pressure loss in Pa
C = A constant
* r
DP= C * Q
2
v
op
Qv = Flow rate in m/hr
DP = C * Qm2 Qm = Flow rate in kg/hr
r r
op
op
o
F) variation
(values: see Table)
=operating density in kg/m
35