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Specifications subject to change without notice
Edition: August 2017
Maintenance EB 31a-01_EN
Operating, assembly and maintenance instructions
BR 31a Rack-and-pinion Actuator,
SRP and DAP
Fig. 1 - Rack-and-pinion actuator
0. Contents
1.
General
1
2.
Design, principle of operation, and dimensions
1
3.
Actuator designation and nameplate
1
4.
Operating conditions
2
4.1 Design
2
4.2 Warnings
2
4.3 Operating media
3
4.4 Supply pressure
3
4.5 Operating temperatures
3
4.6 Response time
3
4.7 Rotation and travel limitation
3
4.8 Lubrication
3
4.9 Coating and corrosion protection
3
4.10 Function and direction of rotation
4
4.11 Fail-safe position
4
5.
Actuator design und mounting instructions
4
5.1 Principle of operation
4
5.2 Important safety instructions
5
5.3 Control and connections
5
5.4 Mounting accessories
5
5.5 Mounting the actuator onto valves
6
5.6 Changing the direction of action/fail-safe position
6
5.7 Alternative mounting options
6
6.
Maintenance and assembly instructions
7
6.1 Fourth generation of rack-and-pinion actuators
(version manufactured from 2000)
6.2 Third generation rack-and-pinion actuators
13
7.
Storage instructions
18
8.
Customer inquiries
18
1. General
These instructions are intended to support the user in the
assembly, maintenance, and repair of BR 31a Rack-and-
pinion Actuators.
Before operating the unit, please read this manual thoroughly
and retain it for future reference.
Technical specifications, as a result of further development of
valves mentioned in these instructions are subject to
alteration without notice.
The text and illustrations do not necessarily display the scope
of supply or any ordering of spare parts.
Drawings and graphics are not to scale. Customer-specific
designs not in accordance with our standard product range
are not shown.
Parts subject to wear are not covered by the warranty.
The device may only be mounted and started
up by skilled staff who are familiar with the
assembly, start-up, and operation of this
product.
In these maintenance and assembly instructions, the term
skilled staff refers to individuals who are able to judge the
responsibilities assigned to them as well as recognize
potential hazards due to their specialized training,
knowledge, and experience as well as their special
knowledge of the relevant standards.
These instructions apply to the actuator only. In addition,
refer to the instructions of the mounted valve.
2. Design, principle of operation, and
dimensions
Design, principle of operation, and dimensions including all
further details and technical data can be found in the Data
Sheet <
TB 31a
>.
3. Actuator designation and nameplate
The actuator type, size, operating pressure, output torque,
direction of rotation, fail-safe action, operating temperature,
and type of attachment are determined by the actuator
designation.
