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Description, Specifications, Instruction manual – Emerson Process Management 667 User Manual

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Instruction Manual

D100311X012

667 Size 80 and 100 Actuators

May 2011

2

Do not install, operate, or maintain 667 actuators without being fully trained and qualified in valve, actuator, and
accessory installation, operation, and maintenance. To avoid personal injury or property damage, it is important to
carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If you
have any questions about these instructions, contact your Emerson Process Management sales office before
proceeding.

Table 1. Specifications

SPECIFICATION

ACTUATOR SIZE

80

100

Nominal Effective Diaphragm Area

cm

2

1761

2902

inch

2

273

450

Yoke Boss Diameters

mm

127

127

178

inch

5

5H

(1)

7

Acceptable Valve Stem Diameters

mm

25.4 or 31.8

31.8

50.8

inch

1 or 1‐1/4

1‐1/4

2

Maximum Allowable Output Thrust

Standard Cast Iron

Construction

All Steel

Construction

N

62942

88075

200170

lb

14150

19800

45000

Maximum Travel

mm

76

102

inch

3

4

Material Temperature Capabilities

_C

-40 to 82

_F

-40 to 180

Pressure Connections

1/4 NPT internal

Approximate Weights Without Handwheel

kg

284

544

lb

626

1200

1. Heavy actuator‐to‐bonnet bolting.

Description

The 667 actuator is a reverse‐acting actuator. Reverse‐acting actuators use air action to lift the diaphragm (away from
the valve), and spring action opposes the diaphragm action (see figure 2). The actuator position changes in response
to varying controlled air pressure to the diaphragm. If air pressure is reduced or lost from the actuator diaphragm,
spring action will extend the actuator stem. The actuator is often used with control valves using a pneumatic
positioner for air pressure control, and where fail action will fully open or close the control valve as the actuator stem
extends.

Also, the actuator can be furnished with either a side‐mounted (size 80 only) handwheel assembly or a top‐mounted
handwheel (adjustable up travel stop) (size 100 only). The size 80 side‐mounted handwheel is normally used as an
auxiliary manual actuator. The size 100 top‐mounted handwheel is used as either a travel stop or an auxiliary manual
actuator.

The actuator can be furnished with a top‐loading capability. A top‐loaded actuator allows air pressure to be applied to
the top of the diaphragm, aiding the spring to extend the actuator stem. This air pressure increases valve seat load on
valve applications where additional seat‐loading is necessary.

Specifications

Refer to table 1 for Specifications of the 667 actuator. See the actuator nameplate for information about a specific
actuator.