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 Configuration 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 notified body, fluid 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 modification index
For after-sales service orders: AA prefix
13
Position in order
For after-sales service orders: configuration ID
14
Flow coefficient:
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 section 3.3)
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: St I · 3: St III
20
Country of origin
21
PSA version
