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EExd, ATEX
Electro-Hydraulic Valve Actuators
with Infared COntrol |
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Operational Philosophy |
The Midland-ACS 900 AND ACS 603 IR EExd-Atex Electronic Positioners will control Electro-Hydraulic EExme, Atex Solenoid Valves to position a hydraulic actuator proportional to a linear, analog command signal. Positional feedback is via a potentiometer or transducer mounted within the actuator. Local control and calibration via an intrinsically safe infrared handheld keypad controller.
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EExd, ATEX
Self Contained
Electro-Hydraulic Valve Actuators |
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General Description |
1. |
EExd, Atex Motorized Pump
(supply voltage to suit) |
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2. |
Stainless Steel Fluid Reservoir
c/w pressurized filler cap |
3. |
EExd, Atex Pressure Switch
- pump stop/start
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4. |
EExd, Atex Pressure Switch
- low pressure alarm |
5. |
Hydraulic Control System
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6. |
Hand Pump for manual operation
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7. |
Linear Potentiometer or Transducer
for feedback signal
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8. |
Stainless Steel Linear Hydraulic Actuator |
9. |
Accumulator Storage
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10. |
Electronic Positioner within EExd, Atex Enclosure
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11. |
EExd, Atex Starter Control Box
c/w local and remote alarm facility |
12. |
EExd, Atex High Temperature Indication |
13. |
EExd, Atex Low Fluid Level Indication |
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Turbine Bypass
Valve Control Systems |
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General Description |
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General Description |
1. |
Position Indicator
Linear Potentiometer within Actuator |
2. |
Electronic Positional (EExde-Atex)
·Comparator Control
·Microprocessor Control
Power Supply nominal
24v DC - others available
Input Signal normal 4-20ma - others available
Accuracy ¡À 1% |
3. |
Linear Actuator
Construction - Stainless Steel
Types Available:
·Double Acting Spring to Close
·Spring to Open |
4. |
Drive Coupling
and Visual Indicator to suit Customer Valve |
5. |
Mounting Bracket
designed to suit Customer Valve |
6. |
Manual Hand Pump
Override (if required) |
7. |
Accumulator Storage
(if required) |
8. |
Valve end of stroke indication (if required) |
9. |
Stainless Steel Hydraulic Control System
housed within IP66 Stainless Steel Cabinet |
10. |
System types available
Stepping or Positional/Modulating
·Stayput Fail Close
·Fail Open
Solenoid Classification
Increased Safety EExme II T4-T6 Atex
Intrinsically Safe EExia IIC T4-T6 Atex
Flameproof EExde IIB T4-T6
Explosion proof U.L. for America and Canada |
11. |
Hydraulic Power Source
Self-contained
·Centralized
·Existing |
12. |
Optional Sunshade for high ambient environm |
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