Samson Type 2488, Type 5824, Type5825 Mounting And Operating Instructions
Flow Regulators
with Electric Actuator
Type 2488/5824 and
Type 2488/5825
Mounting and
Operating Instructions
EB 3135-1 EN
Edition June 2008
Fig. 1 · Type 2488/5824 Flow Regulator with Electric Actuator
Contents Page
1 Design and principle of operation . . . . . . . . . . . . . . . . . . . 4
2 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Mounting position . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Additional installation instructions . . . . . . . . . . . . . . . . . . . . 6
3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 Set point adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2.1 Adjustment without actuator. . . . . . . . . . . . . . . . . . . . . . . 6
3.2.2 Adjustment with Type 5824 Actuator . . . . . . . . . . . . . . . . . . 7
3.2.3 Adjustment with Type 5825 Actuator . . . . . . . . . . . . . . . . . . 7
4 Maintenance–Replacing parts . . . . . . . . . . . . . . . . . . . . . 8
4.1 Replacing the orifice . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2 Cleaning or replacing the plug. . . . . . . . . . . . . . . . . . . . . . 9
4.3 Replacing the diaphragm . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Nameplate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
7 Customer inquiries . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8 Dimensions and weights . . . . . . . . . . . . . . . . . . . . . . . 11
2 EB 3135-1 EN
Contents
Note!
Non-electric actuators and control valve versions do not have their own potential ignition
source according to the ignition risk assessment stipulated in EN 13463-1: 2001, section
5.2, even in the rare incident of an operating fault. Therefore, they do not fall within the
scope of Directive 94/9/EC.
For connection to the equipotential bonding system, observe the requirements specified in
EN 60079-14: 1977 (VDE 0165 Part 1), section 6.3.
General safety instructions
EB 3135-1 EN 3
General safety instructions
4
The flow regulator must be installed, started up, and serviced only by skilled
or semi-skilled staff in accordance with good engineering practice so that
employees and third persons are not exposed to danger.
All safety instructions and warnings given in these mounting and operating
instructions, particularly those concerning installation, start-up, and
maintenance, must be strictly observed.
4
The regulator complies with the requirements of the European Pressure
Equipment Directive 97/23/EC. The declaration of conformity issued for a
valve bearing the CE marking includes information on the applied
conformity assessment procedure and will be provided on request.
4
To ensure appropriate use, only use the regulator in applications where the
operating pressure and temperatures do not exceed the operating values
specified in the order.
Note that the manufacturer does not assume any responsibility for damage
caused by external forces or any other external factors.
Take appropriate safety precautions to prevent hazards that may be caused
in the regulator by the process medium, operating pressure, or moving parts.
4
Make sure the regulator is shipped and stored properly.
4
The electric actuator has been designed for use in electrical power
installations. Strictly observe the relevant safety regulations for wiring and
maintenance work. Only use disconnect devices that are protected against
accidental or inadvertent reconnection. Take special care when making
adjustments on live parts. Do not remove the covers under any
circumstances.
Important!
4
Depending on the field of application, allow the regulator to cool down or
warm up to reach ambient temperature prior to starting any work.
Always depressurize the relevant section of the plant and, if necessary, also
drain the pipeline prior to removing the regulator from the pipeline.
4
When controlling freezing media, protect the flow regulator against frost.
1 Design and principle of
operation
The device combines a Type 2488 Flow Reg
-
ulator with a force-locking Type 5824 Actua
-
tor or a force-locking Type 5825 Electric Ac
-
tuator with fail-safe action. The electric actu
ator is attached to the regulator by means of
the adapter and allows also the temperature
to be controlled by changing the position of
the orifice (restriction) in response to the con
trol signal received from an electric control
device.
The medium flows through the valve in the
direction indicated by the arrow on the valve
body. The flow rate depends on the area released by the valve plug (3) and the adjustable orifice (8.5).
The integral positioning spring (5) determines
the upper differential pressure (0.2 bar).
The high pressure upstream of the orifice is
transmitted to the high-pressure side of the
diaphragm actuator through the control line
(7). The low pressure downstream of the orifice acts on the low-pressure side of the oper
ating diaphragm (6.1) via a hole in the valve
plug. The differential pressure generated by
the orifice (special differential pressure) is
converted into a positioning force by the op
-
erating diaphragm. This force is used to po
sition the valve plug against the force of the
positioning spring (5).
2 Installation
2.1 Mounting position
Install the regulator in a horizontal pipeline.
Make sure the direction of flow corresponds
with the arrow on the valve body. Place the
electric actuator on top of the valve body.
In cases where the control valve is to be insu
-
lated, do not insulate the actuator and cou
pling nut as well.
Make sure that the permissible ambient tem
-
perature is not exceeded especially at the ac
-
tuator stem (10.1). If necessary, use an ex
tension piece (intermediate insulating piece,
order no. 1990-1712). Refer to section 8.
The maximum distance up to the top of the
valve body that can be insulated can be extended to approx. 25 mm.
Note!
Observe the instructions for the electric actuator specified in EB 5824 EN.
Types 5824-10/-11 and 5825-10/-11 Electric Actuators with a 7.5 mm rated travel are
used for valves in sizes DN 15 to 25.
Types 5824-20 and 5825-20 Electric Actua
tors with 12 mm rated travel are required for
valves in nominal sizes DN 32 to 50.
2.2 Strainer
Install a strainer (e.g. SAMSON Type 1 NI)
upstream of the valve to prevent sealing par
-
ticles, weld spatter, pipe scale, and other im
purities carried along by the process medium
from impairing the proper operation, espe
-
cially the tight shut-off of the valve.
4 EB 3135-1 EN
Design and principle of operation
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