FlowAct Diaphragm Linear Actuator FCD VLENIMFACTA4 10/16
2
Diaphragm Linear Actuator - FlowAct
Diaphragm actuators take the form of a flexible diaphragm, placed between
two casings. The upper section of the two chambers is designed pressure
tight, the lower chamber holds a spring opposing the force generated within
the pressure chamber of the actuator. The controlled air supply is connected
to the pressure tight chamber, and an increase or decrease of the air pressure
results in a positioning force of the stem. This kind of actuator is called single
acting with spring return positioning force for linear motion. The linear motion
/ stroke is limited by a stroke range from 10 - 100 mm and a positioning force
range from 500 - 60.000 N dependent on the actuator size. The actuator parts are
designed so that the actuator can be assembled in two fail safe positions, close
or open. Simplicity of design reduces maintenance and parts inventory costs. It
is ideally suited for flow and pressure control of liquid and gas media in oil and
gas, power, chemical and petrochemical processing and related industries. The
FlowAct is manufactured to ISO 9001 standards.
The following instructions are designed to assist in unpacking, installing and
performing maintenance as required on Flowserve FlowAct diaphragm linear
actuators. This instruction manual does not include specific product design data.
Such data can be found on the actuator’s serial plate or specification documents;
additionally, dimensional information can be found in the FlowAct technical
bulletin. Procure needed documents as necessary before you begin any work
on the valve.
User Instructions cannot deal with all possible situations and installation options.
It is required that only trained and qualified technicians are authorized to adjust,
repair or work on diaphragm linear actuators, positioners and other accessories.
Review this bulletin prior to installing, operating or performing any maintenance
on the actuator. Additional Installation, Operation, and Maintenance Instructions
(IOMs) cover other features (such as positioners and other accessories).
To avoid possible injury to personnel or damage to actuator parts, WARNING and
NOTICE
indicators must be strictly followed. Modifying this product, substituting
non-factory parts or using maintenance procedures other than outlined could
drastically affect performance and be hazardous to personnel and equipment and
may void existing warranties. This manual should be used in conjunction with
applicable local and national laws. Failure to comply with User Instructions will
render the manufacturer’s guarantee and liability null and void. Unless otherwise
agreed, the manufacturer’s general terms and conditions of sale shall apply.
Read the user instructions carefully before use.
Keep for future reference.
Contents
1 Scope of Manual
3
7 Storage
4
13 Troubleshooting
12 - 13
2 Intended Use
3
8 Unpacking
4 - 5
14 Operating the Handwheel
13
3 Product Identification
3
9 Installation
5 - 8
15 Disassembly and Reassembly 13 - 73
4 Modification
3 - 4
10 Assembly on valve
8 - 10
16 Torque Requirements
74
5 Safety
4
11 Actuator Quick-Check
10 - 11
17 Lubricants
74
6 Packaging and Transport
4
12 Actuator Maintenance
11 - 12
18 Disposal
75
Figure 1: FlowAct - Actuator, Spring close
Figure 2: FlowAct - Actuator, Spring opens
