Emerson Sempell series User Manual

7
SEMPELL SERIES STE 4 CONTROL DEVICE FOR SAFETY VALVES
Operating instructiOns
• Test course
Ampere meter into position “Operation”, Test
switch in position “Operation”.
- Open the front door and the cover plate of the
electric switch unit.
• Check of the displacement force reserve of
solenoid valve Y1
- Adjust the control air pressure to about
5bar.
Control at the pressure gauge “Load”.
- Turn potentiometer clockwise to the highest
value.
- Press and hold push-button for displacement
force reserve of solenoid valve Y1.
- Slowly turn down the potentiometer anti
clockwise until the solenoid valve Y1 actuate
(power will be reduced).
Solenoid valve Y1 opens. The load will be
relieved. The loading air pressure has to drop
to < 0.2 bar: indicator pressure gauge “Load”,
ampere meter into position “Test 1”, register
the reading of the potentiometer adjustment.
- Loosen push-button.
Solenoid valve Y1 closes (nominal voltage
atY1). Load will be charged.
• Check of the displacement force reserve of
solenoid valve Y2
Check of the control air pressure. Indicator at
the pressure gauge “Load”.
- Turn potentiometer clockwise to the highest
value.
- Press and hold push-button for displacement
force reserve of solenoid valve Y2.
- Slowly turn the potentiometer anti-clockwise
until the solenoid valve Y2 actuate (power will
be reduced).
Solenoid valve Y2 opens. The load will be
relieved. The loading air pressure has to drop
to < 0.2 bar: indicator pressure gauge “Load”,
ampere meter in position “Test 1”, register
the reading of the potentiometer adjustment.
- Loosen push-button.
Solenoid valve Y2 closes (nominal tension
atY2). Load will be charged.
• Check of the displacement force reserve of
solenoid valve Y3
Control of the control air pressure. Indicator
pressure gauge “Load”.
- Turn potentiometer clockwise to the highest
value.
- Press and hold push-button for displacement
force reserve of solenoid valve Y3.
- Slowly turn the potentiometer anti-clockwise
until the solenoid valve Y3 actuate (power will
be reduced).
Solenoid valve Y3 opens. The load will be
relieved. The loading air pressure has to drop
to < 0.2 bar: indicator pressure gauge “Load”,
ampere meter into position “Test 1”, register
the reading of the potentiometer adjustment.
- Loosen push-button.
4.7.3 Lifting air charge
By putting the test switch into position “Test 2”
the 3/2 way solenoid valve (Y4) is energized and
so builds up the lifting air in the pressure space
(H) of the pneumatic actuator.
Indicator: yellow control lamp in the field “Test”
signals, control lamps Y4 and H shine, pressure
indicator gaugeMH, pointer in the gauge is in
the black field “Test 2”.
As the loading air simultaneously is applied
in the pressure space (B) of the pneumatic
actuator, the safety valve does not open. For
the special design with pressure regulator R2
adjust the control pressure at the pressure
regulator R1 to pressure level of pressure
regulatorR2.
4.7.4 Safety valve operation (pneumatic)
With the help of the lifting air the safety valve
can be opened fully to test the movability. In
doing so, for a short time the loading air will be
reduced and the lifting air will be built up.
It is possible to execute this test out of the
control room by remote operation and/or
locally at the control device by the push-button
“Hand Actuation”. At least one possibility has
to be there according to specification TRD 421
and AD-A2.
If a pressure lock valve is in the pneumatic
control unit to raise the lifting air (e.g. at drum
safety valves) it has to be actuated additionally.
Check the movability of the safety valve by an
inspector once a year.
Solenoid valve Y3 closes (nominal voltage
atY3). Load will be charged.
• Adjustment of the working state
- Adjust control air pressure on normal
working pressure.
Control at the gauge “Load”.

Emerson Sempell series Specifications

General

Brand	Emerson
Model	Sempell series
Category	Control Unit
Language	English