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Immingham Storage Co Ltd – Immingham East Terminal
IME-SIS1 - Safety Instrument System Design
P & I Design Ltd
DOCUMENT NO: SI277001_RPT
2 Reed Street, Thornaby, UK, TS17 7AF
Tel: + 44 (0)1642 617444
Fax: + 44 (0)1642 616447
www.pidesign.co.ukAppendix 5
Actuator PFD Table
Actuator Manufacturer
Certification SFF (Partial
Stroke Test)
SFF (No Partial
Stroke Test)
Data
Type
PFD
Actreg
Actreg
90%
MTBF
4.58 x 10
-5
(note 1)
Emerson (Spring Return)
Exida
94%
(73% if no effect
failures are not
included)
82%
PFD
6.78 x 10
-4
(notes 1,2)
2.13 x 10
-3
(notes 1,3)
7.09 x 10
-4
(notes 2, 4)
Remote Control
Air Torque
TUV
90%
MTBF
3.75 x 10
-5
(note 1)
Paladon
Generic
63%
PFD
8.78 x 10
-3
Note 1:
MTTR, 8 hours.
Proof Test Interval, 1 year
Note 2:
Partial Stroke Testing
Note 3:
No Partial Stroke Testing
Note 4:
MTTR 72 hours.
Proof Test Interval, 1 year
Data Supplied
Exida Certificate: Elomatic P-Series Rack & Pinion Actuator
Report: VAD 03/08-24 R004