Emerson Sempell series User Manual

4
SEMPELL SERIES STE 4 CONTROL DEVICE FOR SAFETY VALVES
Operating instructiOns
3 TECHNICAL DATA SAFETY VALVE CONTROL
Manufacturer Sempell GmbH
Name Control Device
Series STE 4
Compressed-air supply Max. 8 bar, 12 bar as option
Operating pressure for the pneumatic actuator Max. 8 bar
Max. 12 bar for lifting air
(accessory with pressure regulator R2)
Air consumption at opening About 26 Nm
3
at 5 bar
Ambient temperature Max. 60 °C
Protection class IP 55
Weight About 78 kg
Type tested approval mark no. TÜV.SV ...-846
Electric connections:
Control device:
Input voltage 230 V, 50 Hz - 24 V DC or 48 V DC as option
Solenoid valve coils:
Connecting voltage 230 V, 50 Hz - 24 V DC or 48 V DC as option
4 OPERATING INSTRUCTIONS
Switch on the control device STE 4 by the key
operated switch at the electric switch unit.
The white control lamp “Operation” shows the
operating state. The pointer of the measuring
instrument in the “Test” field is in the black
area “Operation”.
ATTENTION!
A change of the lead sealed pressure switch
adjustment must take place inthe presence of
the independent TÜVinspector (TRD 601, sheet 2,
section4.2.1).
4.1 Adjustment after installation
Before delivery the pressure switches are
pre-set to the desired set pressure and closing
pressure (see section 2.1). After the installation
of the system a resetting of the pressure
switches (D1, D2, D3) may be necessary
under operating conditions (e.g. because of
temperature changes or after maintenance
works).
Therefore connect a spindle pump with
calibrated pressure gauge (accessory) at one
of the test connections (P1, P2, P3). Apply the
desired set pressure to the pressure switch.
Because of the closed pertaining shut-off
valve (A1, A2, A3) the system pressure has no
influence. In doing so, temporarily prevent the
response of the safety valve by the pneumatic
actuator.
4.2 Pre-setting
In case of a new adjustment or of great
deviations pre-set both micro switches of the
pressure switch (D1, D2, D3) approximately at
their set value first.
The precision pressure switches
Manocomb-Sem-2K have calibrated
nominal value scales for P-max and P-min
with an accuracy of ≤ 1%. By means of the
corresponding knurled-head screws pre-set
the switch points quite precise.
4.3 Set pressure control
Increase pressure with the spindle pump
connected to the test connection until the
control lamp P-max (red) flashes up. This is the
switch point. Register pressure reading on the
test gauge.
To change the switch point, turn the higher
knurled-head screw. Turn the adjusting screw
only a little when you are close to the switch
point. Lower excess pressure up to about 0bar
and then increase again until the pressure
switch actuates. Register pressure indicator
of the gauge again and correct switch point if
necessary.
Repeat procedures until the desired switch
pressure is reached.
In case of pressure decrease, the switching
band of the pressure switch with micro
switches can be determined. This is the
pressure difference between switch-on point
(flash up of the control lamp P-max) and
switch-back point (darken of the control lamp
P-max).
Procedures
• Open the front door of the electric switch
unit. Set test switch in the “Test” field into
position“Test 1”.
Indicator: yellow control lamp in the “Test”
field blinks.
The lifting air to the pneumatic actuator is
temporarily switched off. The safety valve
remains fully operational.
Unlock and close the corresponding shut-off
valve (A1, A2 or A3) by means of interlock key.
Connect spindle pump with pressure gauge
at the test connection (P1 or P2 or P3) of the
previously closed shut-off valve (connections
see section 4.7.1).

Emerson Sempell series Specifications

General

Brand	Emerson
Model	Sempell series
Category	Control Unit
Language	English