Keystone Manuals: Figure 89 (F89) Pneumatic Actuator SIL Safety Manual, Keystone-EN Manuals & Guides
KEYSTONE F89 PNEUMATIC ACTUATOR
SIL SAFETY MANUAL
SIL safety manual for F89 Rack and Pinion Pneumatic Actuators
CONTENTS
1 Functional specification .......................... 1
2 Configuration of the product ................... 1
3 Service condition limitations (limitation of
use) ......................................................... 2
4 Expected lifetime .................................... 2
5 Failure modes and estimated failure
rates ....................................................... 3
6 Installation and site acceptance
procedure ................................................ 4
7 Periodic test and maintenance
requirements .......................................... 4
7.1 General ........................................................ 4
7.2 Full-stroke test ........................................... 4
7.3 Partial-stroke test ...................................... 4
7.4 Proof test and periodic maintenance ......... 4
8 Hardware fault tolerance ....................... 5
9 Classification .......................................... 5
10 Safe failure fraction ................................ 5
11 Mean repair time .................................... 5
12 Systematic capability .............................. 5
1 FUNCTIONAL SPECIFICATION
The safety function for Keystone F89 R&P Series pneumatic actuator is defined as follows:
Double-Acting scenario:
a. When an unsafe condition is detected in a
plant by a process sensor, the controller, via
actuator control system, drives the actuator
to close the shut-down valve, depressurizing
(if under pressure) the opening side of the
actuator and pressurizing the closing side of
the actuator.
b. When an unsafe condition is detected in a
plant by a process sensor, the controller, via
actuator control system drives the actuator
to open the blow-down valve, depressurizing
(if under pressure) the closing side of the
pneumatic actuator and pressurizing the
opening side of the pneumatic actuator.
Single-Acting scenario:
a. When an unsafe condition is detected in a
plant by a process sensor, the controller, via
actuator control system drives the actuator to
rotate with sufficient torque to move a valve
to its fail-safe state when hold-position air
pressure is released.
The Keystone Brand Actuator Selection
Procedure provides functional definition with
specifics on input variables and performance.
In any case, the choice of the safety function to
be implemented is responsibility of the system
integrator.
2 CONFIGURATION OF THE PRODUCT
The Keystone F89 R&P - Series are
pneumatically-operated actuators designed to
operate butterfly, ball valves and any quarterturn mechanism. It is suitable for a range of
applications in industries such as processing,
chemical, food and beverage, mining, power
and water, and available globally. Both the
double-acting and single-acting (spring-return)
versions of the Keystone F89 R&P - Series
pneumatic actuators are designed in such
a way that there are no moving parts on the
outside (except for the position indicator). This
makes them safe, easy to install and virtually
maintenance free.
For further details about actuator
configurations, please refer to the Keystone F89
R&P - Series Product Data Sheets, safety guide
and Installation, Operation and Maintenance
Manual
Emerson.com/FinalControl VCOSI-16511-EN 21/07
© 2021 Emerson. All Rights Reserved.
KEYSTONE F89 PNEUMATIC ACTUATOR
SIL SAFETY MANUAL
3 SERVICE CONDITION LIMITATIONS
(LIMITATION OF USE)
The operating capabilities are listed below:
• Operating medium: Compressed air (dry and
lubricated)
• Maximum Operating Pressure:
- Pneumatic service.
- 8.3 bar (120 psi) max. dynamic
- 10 bar (140 psi) max. static
• Temperature range: Temperature extremes
require different solutions to maintain
actuator operational integrity and reliability.
For each Keystone F89 - Series actuator
is available in three different temperature
executions.
- Standard temperature version:
-20 °C to 80 °C (-4 °F to 176 °F)
- Low temperature version:
-52 °C to 65 °C (-62 °F to 149 °F)
- High temperature version:
-15 °C to 150 °C (-5 °F to 302 °F)
• Torque output range:
- Double-acting F89 R&P - Series actuators,
requiring pressure to rotate in either
direction, are available with a torque range
between 11 Nm (97 lbf.in) and 4173 Nm
(36,955 lbf.in)
- Spring-return F89 - Series actuators,
require pressure in only one direction of
travel and are suitable for air-fail close
and air-fail to open applications without
modification. These models are available
with a spring end torque between 6 Nm
(51 lbf.in) and 1663 Nm (14,729 lbf.in)
• Travel adjustment:
- Optimized product flow with standard
mounted travel stops for valve position
adjustment in open and close position
(+/- 5° at each end of travel)
- 0-100% travel stop available on request
• Safety function:
- Pre-compressed spring cartridge design for
ease of assembly and disassembly
- Anti-blowout drive pinion
- No stopper bolt extends beyond the body
- Integrated connections
- Fail-safe actuator, spring-close and spring-
open
- Adjustable stopper (+/- 5°)
Use the 4 (B)-Port for safety related systems on
Double-acting actuators:
Assembly Code: CW
= Safety function is counterclockwise rotation
2 (A)
4 (B)
2 (A)
4 (B)
4 EXPECTED LIFETIME
Actuator lifetime (for which failure rates
indicated in section 5 are ensured) strongly
depends on operating conditions.
For normal service conditions, Keystone
F89 R&P - Series actuators can be in good
conditions with max 500,000 cycles or 15 years
with regular inspection whichever comes first.
Normal working life is the number of cycles as
defined in Table 1 of EN 15714-3.
Keystone F89 R&P Series carry a warranty
period of:
• 12 months after installation or 18 months
after delivery, whichever is earlier.
Assembly Code: CC
= Safety function is clockwise rotation
4 (B)
2 (A)
2 (A)4 (B)
2
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