Between 0.2 % and 0.5 % of the correct value (depending on the metered fluid, the measuring range and the relevant calibration regulations) except for rotary-piston meters DN 15 (?“) and acid-resistant meters with PCTFE pistons; where 1 % of the actual value applies.
Reproducibility
Within 0.05 %
Adjustment
In steps from 0.01 %
Pressure drop
Max. permissible 3 bar (43.5 psi), max. 0.5 bar (7.25 psi) for acid resistant meters
Transmission from wet to dry space
Gland-free, via permanent magnet coupling
Installation position (axis of meter mechanism)
Rotary-piston meter for industrial use
Automatic batchmeter
Vertical
Special designs
Rotary-piston meter for oil fuels
Any
Rotary-piston meter for liquid gas
Meter axis vertical
Special inlet and outlet pipe sections
Not necessary
Pipe connection
Flanges drilled to DIN 2501, DIN 2547 (PN 63 only)
Filter size (mesh width)
0.8 mm (0.031 inch) for rotary-piston meter
Meter sizes (DN), pressure stages (PN) and permissible flow rates (q) for rotary-piston meters and automatic batchmeters
Design
DN
PN
Rated flow rate
Permissible flow rate
With viscosity8)
Min.1) with continuous2) operation
Max. with intermittent3)4) operation
Max. with continuous operation
mm
(inch)
bar
(psi)
l/min
(USgpm)
mPa·s (cp)
l/min
(USgpm)
l/min
(USgpm)
l/min
(USgpm)
Rotary-piston meters for industrial use
up to PN 16 (MWP 232 psi)
up to PN 63 (MWP 914 psi)
155)
(?)5)
25
(363)
20
(5.3)
? 1 < 5 800 2000
1.5 1.0 0.2 0.2
(0.26) (0.2) (0.05) (0.03)
106) 20 20 10
(5.3) (5.3) (5.3) (1.3)
10 10 10 5
(2.6) (2.6) (2.6) (1.3)
25
(1)
10 16 25 40 63
(145) (232) (363) (580) (914)
100
(26.4)
0,3 0,6 1 5 800
12 6 5 3 1
(3.2) (1.6) (1.3) (0.8) (0.26)
100 100 100 100 100
(26) (26) (26) (26) (26)
80 80 80 80 80
(13) (13) (13) (13) (13)
50
(2)
6 16 25 40 63
(87) (232) (363) (580) (914)
500
(132)
0.3 0.6 1 5 800
40 20 18 10 2
(11) (5.3) (4.8) (2.6) (0.53)
500 500 500 500 500
(106) (132) (132) (132) (106)
350 350 350 350 350
(44) (44) (44) (44) (44)
80
(3)
25 40
(363) (580)
1000
(264)
0.3 0.6 1 5 800
60 35 25 10 5
(16) (9.3) (6.6) (2.6) (1.3)
1000 1000 1000 1000 1000
(211) (264) (264) (264) (211)
700 700 700 700 500
(93) (93) (93) (93) (93)
Automatic batchmeter (Rotary-piston meter with quantity preset register and mechanical shut-off valve)
25
(1)
10
(145)
100
(26.4)
0.3 0.6 1 5 8007)
12 6 5 3 1
(3.2) (1.6) (1.3) (0.8) (0.26)
100 100 100 100 100
(26) (26) (26) (26) (26)
-
-
50
(2)
6 10
(87) (145)
500
132
0.3 0.6 1 5 8007)
40 20 18 10 2
(11) (5.3) (4.8) (2.6) (0.53)
500 500 500 500 400
(106) (132) (132) (132) (106)
-
-
1) For metal rotary-pistons: increase by a factor of 2, for PCTFE and PTFE/graphite filling rotary-pistons: increase by a factor of 3.
2) Continuous operation: over 8 hours a day.
3) For metal pistons: reduce by a factor ? 0.8 to extend service life
4) Intermittent operation: up to 8 hours a day
5) Note: When using pistons made of carbon, there is danger of break in the case of liquid hammers
6) When using pistons made of carbon.
7) Max. permissible viscosity for exact closing of the shut-off valve and for exact dispensing; viscosities up to around 4000 mPa·s (cp) possible.
8) Higher viscosity on request.
Note: In order to extend the service life of the pulse sensor, rotary-piston meters with current and/or pulse output (without intermediate gear) should only be operated at max. 60 % of the permissible flow.
Piston materials
Piston material
Design
Permissible liquid temperature (°C/°F)
Max. perm. dyn. Viscosity (mPa·s (cp))
Article No. code
Carbon
-10 … 300/14 … 572
25
K
Cast iron (mat. No. GG 25) Cast iron (mat. No. GG 25)
