Data Sheet
656 Actuator
D100086X012
Product Bulletin
61.1:656
February 2013
2
Specifications
Maximum Recommended Casing Operating
Pressure
(1)
2.4 bar (35 psig)
Maximum Allowable Casing Pressure
(2)(4)
Actuator
Size
Maximum
Casing
Pressure for
Actuator
Sizing
(2a)
,
Bar (Psig)
Maximum
Excess
Diaphragm
Pressure
(1a)
,
Bar (Psig)
Maximum
Diaphragm
Casing
Pressure
(2a,3a)
,
Bar (Psig)
30 8.6 (125) 1.0 (15) 9.7 (140)
40 4.5 (65) 0.69 (10) 5.2 (75)
60 2.8 (40) 0.69 (10) 3.4 (50)
1a. Additional pressure may be added when the actuator is at full travel. If the
Maximum Excess Diaphragm Pressure is exceeded, damage to the diaphragm or
diaphragm casing might result. See the Maximum Pressure Limitation section.
2a. Maximum diaphragm casing pressure must not be exceeded and must not
produce a force on the actuator stem greater than the maximum allowable actuator
output thrust or the maximum allowable stem load. See the Maximum Pressure
Limitation section.
3a. This maximum casing pressure is not to be used for normal operating pressure. Its
purpose is to allow for typical regulator supply settings and/or relief valve tolerances.
Net Stem Force Output
See table 1
Springs Commonly Used with Rotary Valves
See table 2
Maximum Travel
ACTUATOR SIZE
MAXIMUM RATED STEM
TRAVEL mm (INCHES)
Standard
Travel Stop
Optional
Travel Stop
30 54 (2.125) Not available
40 89 (3.5) 76 (3)
60 105 (4.125) 97 (3.8125)
Operating Temperature Range
(4)
J -40 to 82C(-40to180F) with Nitrile Elastomer
J
-40 to 149C(-40to300F) with Silicone
Diaphragm
Construction Materials
Part Description Construction Material
Diaphragm Nitrile
(3)
(standard)
Diaphragm plate and yoke Cast iron
Diaphragm casings, spring,
spring seats, travel stop, stem,
bearings, bearing seat, and
bearing race
Steel
Adjustment screw Brass
Casing Pressure Connection
1/4 NPT internal
Mounting and Stem Thread Information
Seefigure1
Actuator Weight
Actuator Size
Approximate
Shipping Weight,
kg (Pounds)
30 23 (50)
40 32 (70)
60 73 (160)
Options
Top-mounted handwheel/adjustable travel stop
1. Control and stability may be impaired if this pressure is exceeded.
2. Exceeding this pressure can cause damage to the diaphragm, diaphragm casing, or other parts.
3. For fluid and temperature capabilities of optional materials, consult your Emerson Process Management sales office
4. The pressure/temperature limits in this bulletin and any applicable standard or code limitation for valve should not be exceeded
Ordering Information
When ordering, specify:
1. Actuator type and size
2. Spring range (see table 2)
3. Handwheel or optional travel stop
4. Loading pressure range and volume requirement