Operation instructions Butterfly Check Valve Series TRI-CHECK, with
counter weight and optional hydraulic damper
ZWICK Armaturen GmbH D-58256 Ennepetal
Instructions No.
Zw-Tri-Check-2016 / Rev.11
4
2.4
Marking of butterfly valve
Any butterfly valve carries a marking with following data (type plate, left column):
EC type plate:
For
Marking
Note
Manufacturer
Zwick GmbH
Address see Section 9 <Information>
Model no.
e.g.:
C10125C-AA-11CP
Key no., see the ZWICK catalogue
S.-No.
e.g.:
02-03-7806
Corresponds to: year – month – serial production no.
Size
DN (and numerical
value)
Numerical value in mm, e.g. DN200 or in inch, e.g.
8"
PN / class
Numerical value
for PN /
class
PN / class = Dimension standard for flanged butterfly
valves
PS
Numerical values
in bar
or PSI
= maximum allowable pressure at 20°C
/
maximum allowable pressure at max. temperature
TS
Numerical values in °C
or °F
= ambient temperature ~ 20°C
/
maximum allowable temperature
Date
Year / month
ASME type plate:
For
Marking
Note
Manufacturer
Zwick GmbH
Address see Section 9 <Information>
Model no.
e.g.:
C10125C-AA-11CP
Key no., see the ZWICK catalogue
S.-No.
e.g.:
02-03-7806
Corresponds to: year – month – serial production no.
Size
DN (and numerical
value)
Numerical value in mm, e.g. DN200 or in inch, e.g.
8"
PN / class
Numerical value
for PN /
class
PN / class = Dimension standard for flanged butterfly
valves
CWP / PS
Numerical value
in bar or
PSI
= pressure, upper limit of use at 20°C
max. T / TS
Numerical value in °C or
°F
= Temperature, upper limit of use
Date
Year / month
and marking for the material of parts that are connected to the media (type plate, right column):
for
Marking
Note
Body
Marking after material
standard
Material of the housing
Disc & Cl.
Material of the valve’s disc and clamp ring
Shaft
Material of the shaft
Seat
Material of the seat in the body
Lamin.
Material of the (removable) seat ring in the disc
Standards
API609B/ B16.34/ CE, etc.
Calculation and test standards
The type plate may not be damaged to identify the valve at all times.