ASCO G551A105, 3/2 Monostable Spool Valve - Pneumatic G 1/4 551 Series
G551A105
The ASCO G551A105 is a Series 551 3/2 pneumatic spool valve with G 1/4 ports and monostable operation. It is operated by an air pilot signal rather than an electrical coil, making it suitable for pneumatic control systems where electrical actuation at the valve is not required. Genuine ASCO stock is supplied by General Tech Services LLC, UAE, with free UAE-wide shipping. Request a quote in under a minute - call +971 6 543 6933.
The ASCO G551A105 provides 3/2 directional control with one supply, one outlet and one exhaust port. It is suitable for single-acting cylinders, pilot signals and on/off compressed-air applications. Its pneumatic pilot operation keeps electrical coils away from the valve, which can be useful in applications where electrical equipment at the valve location is unwanted.
The valve uses monostable actuation and is switched through a pneumatic pilot signal. Typical applications include automated machines with single-acting cylinders, pneumatic pilot circuits and like-for-like replacement of an ASCO Series 551 valve. When selecting a directional control valve, confirm the function, actuation and return type, port size and control requirements. For replacement applications, providing the existing valve part number helps confirm the correct variant.
Ready to order the ASCO G551A105? Speak to our team. Call +971 6 543 6933
Key Benefits
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3/2 directional valve function
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G 1/4 ports
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Air-piloted operation with no electrical coil at the valve
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Monostable actuation
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Suitable for single-acting cylinders and pilot circuits
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Genuine ASCO (Emerson) product and specification
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Free UAE-wide shipping on genuine ASCO stock
Who This Product Is Best For
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Single-acting cylinders on automated machines
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Pneumatic pilot circuits and on/off air control
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Applications where electrical actuation at the valve is unwanted
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Maintenance teams replacing a like-for-like ASCO Series 551 valve
How to Install & Use It
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Confirm that the valve function, monostable operation and G 1/4 port configuration match your pneumatic circuit.
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Mount the valve and connect the supply, outlet and exhaust ports according to the markings.
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Connect the pneumatic pilot signal line to the designated pilot port.
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Check the pilot signal and air connections for correct operation.
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Test switching with the actuator unloaded.
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After confirming correct operation, test the system under working pressure.
Frequently Asked Questions
What does the ASCO G551A105 do?
It is a 3/2 pneumatic spool valve used for single-acting cylinders, pilot signals and on/off compressed-air applications.
What does 3/2 mean?
3/2 means three ports and two switching positions: one supply, one outlet and one exhaust.
Does the ASCO G551A105 require an electrical coil?
No. It is air-piloted and uses a pneumatic pilot signal instead of an electrical coil at the valve.
What are the port size and actuation type?
The valve has G 1/4 ports and uses monostable actuation.
What air quality does it need?
Use clean, dry, filtered compressed air. Appropriate air preparation helps protect pneumatic components and maintain consistent switching.
How should I choose this valve or another Series 551 option?
Choose the valve based on function, actuation and return type, port size, control method and application requirements. For replacement applications, provide the existing valve part number to General Tech Services LLC for compatibility confirmation.
What is the difference between the ASCO G551A105 and G551A118?
The G551A105 provides 3/2 directional control, while the G551A118 provides 5/2 directional control. Select based on the required function, control method, port size and application requirements.
Can you supply matching ASCO parts in the same order?
Yes. General Tech Services LLC can supply ASCO pneumatic components such as solenoid and spool valves, shut-off valves, silencers, filters, regulators, cylinders and position detectors. Share your application requirements for a matching quotation.
Is genuine ASCO stock available in the UAE?
General Tech Services supplies original ASCO pneumatic valves in the UAE with technical support and free UAE-wide shipping.
What details should I send with a quote request?
Provide the part or model number, required quantity and application details such as pressure, flow, equipment type and operating environment. This helps confirm the correct ASCO variant.
What is the price of the ASCO G551A105?
Pricing is quote-based. Call General Tech Services LLC on +971 6 543 6933 or submit the Request a Quote form.
For pricing or to place an order, contact General Tech Services LLC. Call +971 6 543 6933.
