CP Range
Compact Pneumatic Actuators
for Quarter-Turn Valves
Redefining Flow Control
Rotork Actuators Quality Controlled
Rotork is a global leader in valve actuation
technology. We provide a comprehensive range
of valve actuators, controls and associated
equipment, as well as a variety of valve actuator
services including commissioning, preventive
maintenance and retrofit solutions.
Rotork Fluid Systems specialises in the production
and support of fluid power actuators and
control systems. We are dedicated to providing
the marketplace with the latest technology,
consistently high quality, innovative design,
excellent reliability and superior performance.
Rotork Fluid Systems maintains dedicated engineering groups
for Applications, Product Improvement and New Product
Development so that our customers can gain all the benefits
that ever advancing technologies have to offer and to ensure
our efforts are in step with the continually evolving needs of
our customers.
Most importantly, we have a long-standing commitment to
meeting the special needs of a wide range of applications
including: oil and gas exploration and transportation;
municipal water and wastewater treatment; power
generation; and the chemical and process industries.
With engineering and manufacturing expertise going back to
1957, we have tens of thousands of successful valve actuator
installations throughout the world.
CP Range Compact Pneumatic Actuators
Reliability by Design
CP range actuators are a versatile, modular, scotch yoke
design available in both double-acting and spring-return
configurations. The compact and efficient design yields
surprisingly high torques even at low pressures. The design
concepts found in Rotorks large, heavy-duty actuators has
been applied to the CP range, which brings heavy-duty
actuator qualities to small, quarter-turn actuators.
Safety by Design
The CP range has been designed to be inherently safe and
serviceable. The springs, within the cartridge on the inboard
side of the pneumatic cylinder, are contained by the piston
and piston rod thus eliminating the possibility of inadvertent
release of spring force. The design also allows access to the
piston seal without disassembly of the spring cartridge.
High Performance by Design
Product enhancements have resulted in an even more
compact and lighter actuator that produces more torque
output while retaining a robust, dependable design.
CP Range Quarter-Turn Pneumatic Actuators
Versatility
The CP range modular design enables complete actuators
to be easily configured for a variety of applications. Most
components are common to both double-acting and springreturn configurations. Different springs may be used with the
same spring container to yield different torque characteristics
and can be changed with ease if necessary. Jackscrew manual
overrides may be easily fitted at any time, even in the field.
Redefining Flow Control
Inside the CP Range Actuator1
Every Rotork Fluid Systems actuator is built to
provide long and efficient service with minimum
maintenance. The design, engineering and
materials used in their construction ensure
optimum performance even in the harshest
of environments.
12, 13
14
25
7
5
Operating Pressure: Up to 12 bar (174 psi)
Torque Output:
Up to 4,500 Nm (39,828 lbf.in)
Temperature Ranges:
Standard:
High:
Low:
Extreme Low:
-30 to 100 C
-20 to 160 C
-40 to 160 C
-60 to 160 C
(-22 to 212 F)
(-4 to 320 F)
(-40 to 320 F)
(-76 to 320 F)
Efficiency and Long Life
Extended service life is provided by precisely aligned and
balanced steel/bronze/teflon piston rod support bearings.
These bearings elliminate the misalignment, higher friction
and wear found in other designs.
6
14
8, 9, 10
Corrosion Resistance
Enhanced seal and bearing life as well as excellent wear
resistance are provided by treating all wearing surfaces with
either electroless-nickel/chromium plating or a nitro-oxidation
process. These processes provide increased surface hardness,
reduced surface roughness and extremely high resistance to
corrosion.
22
24
21
Easy Mounting of Accessories
NAMUR topworks mounting interface facilitates easy
installation of industry standard switch box and positioner
assemblies. Likewise, the valve interface conforms to ISO 5211.
11
17
Environmental Protection
O-ring sealing provides protection certified to IEC IP66M,
IP67M.
Robust Yet Lightweight Design
16
29
18B
19
A ductile iron housing provides an excellent strength to
weight ratio. The intelligent CAD/CAM design eliminates all
unnecessary mass yet allows for higher operating pressures
than competitive designs.
Available Options
Integral manual override
Control systems
Custom actuator-to-valve adaptors and stem couplings
Custom paint specifications
1. The illustration and parts list contained on p4-5 are relevant for CP/D 35, 45, 55, 65 (double-acting)
and CP/S 55, 65 (spring-return). See page 6 for equivalent information on CP/S 35 and 45.
CP range torque output and dimensional data are available for download on www.rotork.com
20
ITEM DESCRIPTION
MATERIAL
QTY.
Stop Screw - Housing
Carbon Steel
Stop Nut
Carbon Steel
O-ring
Buna-N
End Flange
Ductile Iron
Piston
Carbon Steel
O-ring
Buna-N
Cylinder Tube
Carbon Steel
Washer
Carbon Steel
O-ring
Buna-N
10
Piston Retaining Bolt
Alloy Steel
11
Retaining RIng
Spring Steel
12
Key
Carbon Steel
13
Spring
Spring Steel
14
O-ring
Buna-N
15
O-ring
Buna-N
16
Bushing
Steel/Bronze/Teflon
17
Spring Pin
Spring Steel
18A
Axial Bar - Double-Acting
Alloy Steel
18B
Axial Bar - Spring-Return
Alloy Steel
19
Bushing
Steel/Bronze/Teflon
20
Housing Breather
Carbon Steel
21
Housing
Ductile Iron
22
Stop Screw - End Flange
Carbon Steel
23
Yoke
Ductile Iron
24
Tie Rod
Alloy Steel
25
Adapter Plate
Ductile Iron
26
Washer
Carbon Steel
27
Bushing
Steel/Bronze/Teflon
28
Yoke Pin
Alloy Steel
29
Output Shaft
Alloy Steel
30
Spring
Spring Steel
1**
31
Spring Container
Carbon Steel
1**
1
18A
2, 3
19
15
4
23
14
*
**
Quantity (2) for double-acting, (3) for spring-return.
Spring-return units only.
30 7
31
Approvals and Industry Standards
Actuators certified in accordance with ATEX 94/9/EC
30
14
Actuators certified in accordance with PED Directive
TR TS 010 and TR TS 012 Certificates of Conformity
Complies with EN60529 (1991) + (A1:2000)
for IP66M/67M
Management system in accordance with ISO 9001:2008
26, 27, 28
Certified suitable for use at SIL3 as a single device in
accordance with IEC 61508
ABS product design assessment
See publication PUB000-012 or rotork.com for SIL data.
Redefining Flow Control
Inside the CP Range Actuator
The illustration and parts list on this page are
applicable only to body size 35 and 45 springreturn units.
ITEM DESCRIPTION
MATERIAL
QTY.
Stop Screw - Housing
Carbon Steel
Stop Nut
Carbon Steel
O-ring
Buna-N
End Flange
Ductile Iron
Piston
Carbon Steel
O-ring
Buna-N
Cylinder Tube
Carbon Steel
Washer
Carbon Steel
O-ring
Buna-N
10
Piston Retaining Bolt
Alloy Steel
11
Retaining RIng
Spring Steel
12
Key (not shown)
Carbon Steel
13
Spring (not shown)
Spring Steel
14
O-ring
Buna-N
15
O-ring
Buna-N
16
Bushing
Steel/Bronze/Teflon
18
Axial Bar
Alloy Steel
19
Bushing
Steel/Bronze/Teflon
20
Housing Breather
Carbon Steel
Complies with EN60529 (1991) + (A1:2000)
for IP66M/67M
21
Housing
Ductile Iron
22
Stop Screw - End Flange
Stainless Steel
23
Yoke
Ductile Iron
24
Tie Rod
Alloy Steel
25
Adapter Plate
Ductile Iron
26
Washer
Carbon Steel
27
Bushing
Steel/Bronze/Teflon
28
Yoke Pin
Alloy Steel
29
Output Shaft
Alloy Steel
30
Spring
Spring Steel
31
O-ring
Buna-N
32
O-ring
Buna-N
33
Stop Nut
Stainless Steel
Operating Pressure: Up to 12 bar (174 psi)
Torque Output:
Up to 800 Nm (7,000 lbf.in)
Temperature Ranges:
Standard:
High:
Low:
Extreme Low:
-30 to 100 C
-20 to 160 C
-40 to 160 C
-60 to 160 C
(-22 to 212 F)
(-4 to 320 F)
(-40 to 320 F)
(-76 to 320 F)
Approvals and Industry Standards
Actuators certified in accordance with ATEX 94/9/EC
Management system in accordance with ISO 9001:2008
Certified suitable for use at SIL3 as a single device in
accordance with IEC 61508
See publication PUB000-012 or rotork.com for SIL data.
8, 9, 10
18
29
26, 27, 28
30
22
24
32
16
11
33
20
14
19
2
6
5
7
31
14
3
21
23
15
25
Model Number Designation
Example Model Number
C P / S 055 - 100 A
/ CB - MH
ACTUATOR TYPE
C = Compact Scotch Yoke
SUPPLY TYPE
P = Pneumatic
EXECUTION TYPE
S = Spring-Return
D = Double-Acting
CENTRE BODY SIZE Nominal movement arm (mm)
035, 045, 055, 065
CYLINDER SIZE
TEMPERATURE
A = Standard
B = High
C = Low
E = Extreme Low
EXECUTION TYPE
A
= Double-Acting
AA-EA
= Spring-Return 55, 65 without spacer
CB, DB
= Spring-Return 55, 65 with spacer
AL-EL
= Spring-Return 35, 45 without spacer
CM, DM = Spring-Return 35, 45 with spacer
MANUAL OVERRIDE TYPE
M, MH
Extensive Product Range
Rotork Fluid Systems offers the worlds most extensive line of
fluid power valve actuators. Products include low- and highpressure pneumatic, hydraulic and electro-hydraulic actuators
and control systems. Scotch yoke, linear, and rack and pinion
designs are available in both double-acting and spring-return
configurations. We also manufacture special build actuators
for subsea and nuclear power applications and specialty
products including a hydraulic damper for swing check
valves and a manually operated hydraulic power handwheel.
Through other divisions, Rotork also offers complete lines of
electric actuators, gearboxes, accessories, and associated flow
control equipment.
Redefining Flow Control
Redefining Flow Control
www.rotork.com
A full listing of our worldwide sales and
service network is available on our website.
Rotork plc
Brassmill Lane, Bath, UK
tel
+44 (0)1225 733200
fax
+44 (0)1225 333467
email mail@rotork.com
Rotork are corporate
members of the Institute
of Asset Management
All Rotork Fluid Systems actuators are manufactured under a third party accredited
ISO9001 quality assurance programme.
PUB013-001-00
Issue 10/15
Published and produced by Rotork Fluid Systems.
Rotork recognises all registered trademarks. As we are continually developing our
products, their design is subject to change without notice. POWTG1015
