4
Competence in Functional Safety
Functional safety of globe valves, rotary plug valves, ball valves and butterfly valves
1 Scope
Valves and the associated actuators are used to isolate pipelines in safety-instrumented systems. Alternatively, they can
also be used for pressure relief, i.e. by completely opening valves.
2 Validity of this manual
This manual applies to control valves manufactured by the following companies within SAMSON:
SAMSON AG
LEUSCH GmbH Industriearmaturen
PFEIFFER Chemie-Armaturenbau GmbH
VETEC Ventiltechnik GmbH
Refer to the manufacturer‘s declarations in Appendix 1 of this manual for the valve models concerned.
The individual versions of the valves can be identified by their nameplates
10 EB 8310-7 EN
Markings on the device
2 Markings on the device
2.1 Actuator nameplate
The nameplate is stuck on the diaphragm casing. It includes all details required to identify the
actuator:
2 Conguration ID
3 Serial number
4 Actuator area
5 Bench range in bar
6 Bench range in psi
7 Operating travel in mm
8 Operating range in bar
9 Operating range in psi
10
Permissible supply pressure p
max
in bar
11
Permissible supply pressure p
max
in psi
12
Symbol indicating fail‑safe action
Actuator stem extends (FA)
Actuator stem retracts (FE)
Manual override
14
Connecting thread
15
Diaphragm material
16
Date of manufacture
7
4
14
15
12
6
5
8
9
10 11
SAMSON 3271
Made in Germany
Var-ID
3
2
Serial no.
16
Fig.1: Nameplate
Example of a nameplate for a Type 3241
Valve with Type 3271 or Type 3277 Pneumatic
Actuator manufactured by SAMSON AG
12 EB 8015 EN
Markings on the control valve
2 Markings on the control valve
2.1 Valve nameplate
6 8
12 13
10 11
14
15
16
17
18
1…5
9
SAMSON
20
21
19
Fig.1: Valve nameplate
1…5 PED (Pressure Equipment Directive), "Art. 4, Abs. 3"
ID of the notied body, uid group, and category
6 Type designation
8 Material
9 Year of manufacture
10 Valve size:
DIN: DN · ANSI: NPS· JIS: DN…A/B
11 Pressure rating:
DIN: PN · ANSI: CL · JIS: K
12 Order no. with modication index
For after-sales service orders: AA prex
13 Position in order
For after-sales service orders: conguration ID
14 Flow coefcient:
DIN: K
VS
· ANSI: C
V
· JIS: C
V
15 Characteristic:
%: equal percentage · Lin: linear · NO/NC: quick opening
16 Seat/plug seal:
ME: metal (see section3.3)
HA: carbide metal
ST: Stellite
®
facing
KE: ceramic
PT: soft seal with PTFE
PK: soft seal with PEEK
17 Seat code (trim material) · On request
18 Pressure balancing:
DIN: D · ANSI: B · JIS: B
19 Flow divider:
1: StI · 3: StIII
20 Country of origin
21 PSA version