Asco valve | RS UAE

Q: What are common ASCO valve configurations and how do I wire them?

Common configurations and wiring notes include: 2-way normally closed (NC) or normally open (NO) variants, used for simple on/off control of a line. 3-way valves for diverting flow or implementing a bleed path in pneumatic circuits. 4-way valves for controlling double-acting cylinders in actuator applications. Wiring : DC coils are typically wired with a DC supply and may require a diode or suppression device; AC coils may need a transformer and appropriate harnessing. Always follow the manufacturer wiring diagram and ensure proper polarity for DC coils when applicable. Typical installation involves securing the valve to a panel or manifold, connecting the inlet/outlet ports to the correct lines, and wiring the coil to a control relay or PLC output. For reliability, keep wiring tidy, avoid excessive voltage inrush, and protect coils from moisture and dust with gaskets or housings where required.

Default Valve Position

NC (572)

NO (93)

NO/NC (1)

Number of Ports

2 (405)

3 (129)

5 (93)

1 (5)

4 (1)

Minimum Operating Temperature

-20°C (196)

-10°C (192)

-25°C (188)

5°C (33)

0°C (6)

-196°C (1)

Outlet Thread Standard

G (219)

ISO 228/1 and ISO 7/1 (99)

ISO 228/1 (84)

ISO 7.1 (65)

ISO 228/1 & ISO 7/1 (24)

RP (16)

NPT (4)

ISO 228/1 or NPT (3)

G ISO 228/1 (1)

Inlet Port Gender

Female (353)

Male (109)

Outlet Port Gender

Female (406)

Male (56)

Servo Assist

No (348)

Yes (70)

Valve Type

Angle Seat (161)

Motorised (1)

Connection Thread Standard

G (149)

Metric (7)

ISO 228-1 (2)

No (2)

G 1/4 in, G 1/8 in (1)

Actuation Type

Solenoid (75)

Pneumatic (27)

Pilot (14)

Solenoid/Air (13)

Pilot/Spring (3)

Solenoid/Spring (1)

Seal Material

Acrylonitrile Butadiene Rubber (81)

Nitrile Rubber (NBR) (36)

Polyurethane, Nitrile Rubber (NBR) (6)

Nitrile Rubber, Polyurethane (3)

Nitrile Rubber (NBR), Fluorelastomer (2)

Nitrile Rubber (NBR), Polyurethane (2)

Polyurethane, Nitrile Rubber (2)

Fluorelastomer, Nitrile Rubber (NBR) (1)

Port Type

Threaded (96)

Push-in (19)

Tap (7)

Side, Coupler (3)

G 1/4 (2)

1/4 in (1)

Coupler, Side (1)

Minimum Pilot Pressure

2bar (81)

1.5bar (24)

Maximum Pilot Pressure

10bar (80)

8bar (24)

Number of Positions

2 (80)

3 (20)

Valve Material

Stainless Steel (50)

Brass (20)

316L Stainless Steel (4)

Material

Aluminium (48)

Metal, Aluminium, Polycarbonate (1)

Mount Pattern

Through Hole (23)

DIN (19)

NAMUR (3)

Minimum Operating Pressure

0.2bar (33)

0bar (3)

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve G356C150S19FLF1, 3 Port, 24 V

RS Stock No. 259-0499

Brand EMERSON ? ASCO

Category Link: https://ae.rsdelivers.com/browse/mechanical-fluid-power-tools/plumbing-pipeline/valves-taps/solenoid-valves
Connection: 1/4 in
Super Section: Valves & Taps

AED 430.86

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve 30211178--P.24/DC, NC, 6 mm

RS Stock No. 255-6124

Brand EMERSON ? ASCO

Accessory Type: Solenoid Valve
Category: Pneumatic Valve Accessories
Product Type: Mini Solenoid Valve

AED 312.11

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve Coil 400127-085, 48 V ac

RS Stock No. 257-7224

Brand EMERSON ? ASCO

Category: Solenoid Valve Coils
For Use With: Solenoid valve
Series: 108

AED 176.90

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve 30215178--P.24/DC, NC, G 1/8

RS Stock No. 255-6126

Brand EMERSON ? ASCO

Category: Pneumatic Valve Accessories
Manufacturer Series: 302
Product Type: Mini Solenoid Valve

AED 435.92

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve Coil 400 325 217, 230 V ac

RS Stock No. 656-3484

Brand EMERSON ? ASCO

For Use With: Solenoid valve
Series: 238
Supply Voltage: 230 V ac

AED 197.51

in stock now

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EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551 Series

RS Stock No. 255-6174

Brand EMERSON ? ASCO

Maximum Operating Pressure: 10 bar
Maximum Operating Temperature: 60°C
Series: 551

AED 1.260.51

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve Coil 400425-101, 24 V ac

RS Stock No. 656-3232

Brand EMERSON ? ASCO

For Use With: Solenoid valve
Series: 272/374
Supply Voltage: 24 V ac

AED 228.80

in stock now

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EMERSON ? ASCO EMERSON – ASCO Pneumatic Valve - 5/2 Monostable Solenoid G 551 Series

RS Stock No. 077-7703

Brand EMERSON ? ASCO

Connection Thread Standard: G
Seal Material: Acrylonitrile Butadiene Rubber
Section: Pneumatics & Hydraulics

AED 780.66

in stock now

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EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551 - 553 Series

RS Stock No. 255-6168

Brand EMERSON ? ASCO

Category Link: https://ae.rsdelivers.com/browse/mechanical-fluid-power-tools/pneumatics-hydraulics/pneumatic-valves/pneumatic-solenoid-valves
Connection Thread Standard: G
Number of Positions: 3

AED 966.04

in stock now

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EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551-553 Series

RS Stock No. 255-6170

Brand EMERSON ? ASCO

Actuation Type: Electro-Pneumatic
Category: Pneumatic Solenoid Valves
Category Link: https://ae.rsdelivers.com/browse/mechanical-fluid-power-tools/pneumatics-hydraulics/pneumatic-valves/pneumatic-solenoid-valves

AED 741.79

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve Coil 400 325 101, 24 V ac

RS Stock No. 656-3462

Brand EMERSON ? ASCO

Category: Solenoid Coils for Process Valves
For Use With: Solenoid valve
Series: 238

AED 197.51

in stock now

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EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551 Series

RS Stock No. 255-6173

Brand EMERSON ? ASCO

Body Material: Aluminium
Category Link: https://ae.rsdelivers.com/browse/mechanical-fluid-power-tools/pneumatics-hydraulics/pneumatic-valves/pneumatic-solenoid-valves
Valve Function: Monostable

AED 817.12

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve 18990001, 3 Port, NC

RS Stock No. 278-4384

Brand EMERSON ? ASCO

Body Material: Fibreglass Reinforced Polyamide
Number of Ports: 3
Orifice Diameter: 1.2mm

AED 174.59

in stock now

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EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 511 Series

RS Stock No. 255-6172

Brand EMERSON ? ASCO

Actuation Type: Electro-Pneumatic
Category: Pneumatic Solenoid Valves
Super Section: Pneumatic Valves

AED 943.23

in stock now

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EMERSON ? ASCO EMERSON – ASCO Exhaust Valve x 10 bar A: Threaded B: Threaded 1/4 in

RS Stock No. 032-8564

Brand EMERSON ? ASCO

Connection Size A: 1/8 in
Connection Type C: Threaded
Minimum Operating Pressure: 0.2bar

AED 1.641.66

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve E210C088SCA8, 2 Port, NC, 230 V ac

RS Stock No. 048-8346

Brand EMERSON ? ASCO

Minimum Operating Temperature: -20°C
Number of Ports: 2
Supply Voltage: 230 V ac

AED 2.793.86

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve - 3/2 Solenoid/Air 302 Series 24V

RS Stock No. 255-6122

Brand EMERSON ? ASCO

Actuation Type: Electro-Pneumatic
Category Link: https://ae.rsdelivers.com/browse/mechanical-fluid-power-tools/pneumatics-hydraulics/pneumatic-valves/pneumatic-solenoid-valves
Section: Pneumatics & Hydraulics

AED 312.11

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve 10900001.24/DC, 3 Port, NC, 24 V dc

RS Stock No. 306-1941

Brand EMERSON ? ASCO

Application: Air, Inert Gas, Oil, Water
Orifice Diameter: 1mm
Section: Plumbing & Pipeline

AED 743.53

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve S10609Z130AD2, 2 Port, NC, 24 V dc

RS Stock No. 048-8756

Brand EMERSON ? ASCO

Default Valve Position: NC
Number of Ports: 2
Type: 2/2

AED 813.08

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve E210C035SCA2, 2 Port, NO, 24 V ac

RS Stock No. 048-8334

Brand EMERSON ? ASCO

Category: Solenoid Valves
Category Link: https://ae.rsdelivers.com/browse/mechanical-fluid-power-tools/plumbing-pipeline/valves-taps/solenoid-valves
Section: Plumbing & Pipeline

AED 2.112.46

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve E210C034SCA4, 2 Port, NO, 110 V ac

RS Stock No. 048-8560

Brand EMERSON ? ASCO

Category: Solenoid Valves
Hazardous Area Certification: EC, ATEX
Product Type: Solenoid Valve

AED 1.744.18

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve SCE238D004.24/DC, 2 Port, NC, 24 V dc

RS Stock No. 306-1474

Brand EMERSON ? ASCO

Category: Solenoid Valves
Maximum Closing Time: 110ms
Section: Plumbing & Pipeline

AED 1.093.33

in stock now

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EMERSON ? ASCO EMERSON – ASCO Solenoid Valve - 3/2 Solenoid/Air 188 Series

RS Stock No. 255-6119

Brand EMERSON ? ASCO

Actuation Type: Electro-Pneumatic
Category: Pneumatic Solenoid Valves
Super Section: Pneumatic Valves

AED 281.83

in stock now

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EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551-553 Series

RS Stock No. 255-6169

Brand EMERSON ? ASCO

Maximum Operating Pressure: 10.4 bar
Seal Material: Polyurethane, Nitrile Rubber
Section: Pneumatics & Hydraulics

AED 869.08

in stock now

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What is an ASCO valve?

An ASCO valve is a family of solenoid valves and air-operated valves manufactured by ASCO (now part of Emerson). These valves are designed to control the flow of compressed air or liquids in automation and process systems. A typical ASCO valve uses an electric coil to move a plunger or diaphragm, opening or closing a flow path inside a rugged body. They are known for reliability, fast response times, and long service life in industrial environments, making them a common choice for pneumatic control, irrigation, beverage dispensing, and machinery automation.

What types of ASCO valves are available and how do I choose between them?

ASCO offers a range of valve types to suit different control strategies and media. The most common categories are:

2-way valves (single port, on/off control of flow) for straightforward shutoff or isolation tasks.
3-way valves (one inlet and two outlets) for diverting flow or using a pilot-operated arrangement.
4-way valves (two inlets and two outlets) for actuating double-acting cylinders in pneumatic systems.
Direct-acting vs Pilot-operated designs, chosen based on system pressure and response requirements.
AC coil vs DC coil versions, offering different voltages and power profiles for compatibility with control cabinets and field wiring.
Materials and configurations including brass bodies, stainless steel, and plastic/resin bodies, with various seal materials (NBR, EPDM, FKM) for media compatibility.

When selecting, consider media (air, water, chemical compatibility), operating pressure (low to high), temperature, coil voltage, duty cycle, port size (for example 1/8", 1/4", 1/2" NPT or BSP), and environmental protection (IP ratings). RS Components carries a broad range of ASCO valves to cover common industrial needs, ensuring you can pair the valve with the right coil and body material.

How do I choose the right valve for my application (media, pressure, temperature, and wiring)?

Selecting the correct ASCO valve involves matching several key specifications to your system requirements. Consider:

Media compatibility: ensure the seal and body material are compatible with air, water, oils, or chemicals in your circuit. Seals may be NBR, EPDM, or FKM depending on the medium.
Pressure and flow: verify the valve’s maximum inlet pressure and Cv (flow coefficient) to guarantee adequate performance at your operating point.
Temperature: confirm the valve can withstand the ambient and media temperature without degradation of seals or plastic components.
Coil voltage and power: choose AC or DC coils in standard volts (e.g., 12 VDC, 24 VDC, 24 VAC, 110 VAC) and review coil resistance and energy consumption for control panel sizing.
Port size and thread: select the correct port threads (NPT, BSP, metric) and size (1/8", 1/4", 1/2" are common) to fit your plumbing.
Environment and IP rating: rugged industrial environments may require IP65/67 ratings and robust housings.

If in doubt, start with a general-purpose 2-way or 3-way valve in a standard coil voltage, then determine if a pilot-operated variant offers reduced energy use or improved performance at your operating pressure.

What are common ASCO valve configurations and how do I wire them?

Common configurations and wiring notes include:

2-way normally closed (NC) or normally open (NO) variants, used for simple on/off control of a line.
3-way valves for diverting flow or implementing a bleed path in pneumatic circuits.
4-way valves for controlling double-acting cylinders in actuator applications.
Wiring: DC coils are typically wired with a DC supply and may require a diode or suppression device; AC coils may need a transformer and appropriate harnessing. Always follow the manufacturer wiring diagram and ensure proper polarity for DC coils when applicable.

Typical installation involves securing the valve to a panel or manifold, connecting the inlet/outlet ports to the correct lines, and wiring the coil to a control relay or PLC output. For reliability, keep wiring tidy, avoid excessive voltage inrush, and protect coils from moisture and dust with gaskets or housings where required.

What are typical applications for ASCO valves?

ASCO valves are used across many sectors to precisely control flow and pressure. Typical applications include:

Pneumatic system control in packaging, automation, and material handling
HVAC and climate control for zone isolation and actuator functions
Water treatment, irrigation, and beverage equipment where clean, reliable shutoff is required
Medical devices and laboratory instrumentation requiring rapid, repeatable valve operation
Industrial machinery, robotics, and OEM equipment for precise actuation

When integrating with RS Components’ catalog, you’ll find ASCO valves offered in configurations optimized for quick integration into standard assemblies, with documentation and compatibility information for easy procurement and replacement.

How do I maintain ASCO valves and troubleshoot common issues?

Routine maintenance helps maximize life and reliability. Common checks include:

Inspect power supply and confirm the coil is energizing correctly; a buzzing or no-click may indicate coil or wiring issues.
Check for leaks at seals, body joints, and port connections; replace seals if worn or degraded.
Ensure clean media and proper filtration to prevent fouling of internal components.
Test the valve’s response time and verify that pilot-operated variants operate as expected under system pressure.
For DC coils, measure resistance to detect winding faults; for AC coils, verify correct voltage and absence of overheating.

If corrosion or heavy fouling is present, disassembly and thorough cleaning or coil replacement may be required. Always follow safety procedures when servicing valves on live systems.

Why purchase ASCO valves from RS Components?

RS Components offers genuine ASCO valves with broad coverage of sizes, materials, and coil options to fit many automation designs. Benefits include:

Extensive product range with datasheets, technical support, and compatibility notes
Access to official ASCO parts and cross-references for quick replacements
Fast shipping, global availability, and clear pricing for project planning
Documentation for safety, installation, and maintenance to help ensure compliance

Whether you need a 2-way brass-bodied valve with 24 VDC coil or a stainless steel 4-way valve with 110 VAC coil, RS Components can help you find the right ASCO valve for your application and integrate it into your control system efficiently.

What should I consider for compatibility with existing systems and accessories?

Consider accessory compatibility to optimize performance and ease of maintenance:

Manifolds and brackets for rapid installation and modular control
Connectors and wiring harnesses to match coil voltage and color coding
Filters and regulators to protect valves from contaminants and regulate supply pressure
Seal kits and replacement parts for long-term serviceability
Thread adapters (NPT, BSP, metric) to fit existing piping

Confirm the thermal and electrical ratings align with your control cabinet, and select valves with documentation that matches your safety and maintenance standards.

Angle Valves Non-Return Check Valve Floating valve Air release valve Pressure regulating valve VGA Cable 20m Pipes and Valves POE Power Supply Finder 12 51 3m black sealants

"Asco valve"

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve G356C150S19FLF1, 3 Port, 24 V

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve 30211178--P.24/DC, NC, 6 mm

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve Coil 400127-085, 48 V ac

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve 30215178--P.24/DC, NC, G 1/8

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve Coil 400 325 217, 230 V ac

EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551 Series

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve Coil 400425-101, 24 V ac

EMERSON ? ASCO EMERSON – ASCO Pneumatic Valve - 5/2 Monostable Solenoid G 551 Series

EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551 - 553 Series

EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551-553 Series

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve Coil 400 325 101, 24 V ac

EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551 Series

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve 18990001, 3 Port, NC

EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 511 Series

EMERSON ? ASCO EMERSON – ASCO Exhaust Valve x 10 bar A: Threaded B: Threaded 1/4 in

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve E210C088SCA8, 2 Port, NC, 230 V ac

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve - 3/2 Solenoid/Air 302 Series 24V

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve 10900001.24/DC, 3 Port, NC, 24 V dc

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve S10609Z130AD2, 2 Port, NC, 24 V dc

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve E210C035SCA2, 2 Port, NO, 24 V ac

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve E210C034SCA4, 2 Port, NO, 110 V ac

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve SCE238D004.24/DC, 2 Port, NC, 24 V dc

EMERSON ? ASCO EMERSON – ASCO Solenoid Valve - 3/2 Solenoid/Air 188 Series

EMERSON ? ASCO EMERSON – ASCO Spool Valve - Solenoid/Air G 551-553 Series

What is an ASCO valve?

What types of ASCO valves are available and how do I choose between them?

How do I choose the right valve for my application (media, pressure, temperature, and wiring)?

What are common ASCO valve configurations and how do I wire them?

What are typical applications for ASCO valves?

How do I maintain ASCO valves and troubleshoot common issues?

Why purchase ASCO valves from RS Components?

What should I consider for compatibility with existing systems and accessories?