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ASCO
There are many different versions of series 551. It can be provided with most voltage variants, with ATEX approved coil for explosive environments and with a low power pilot valve. In addition to aluminium, housing is available in SS316 steel or brass for low temperatures, -40 °C. All electrically and air operated valves with Aluminium housing have environmental protection as standard. This means that all the internal parts are totally sealed against fluids, dust, corrosive substances etc. that may be present in the direct surroundings. Even the exhaust from the return chamber is led to the exhaust ports via an internal channel. For further protection, the pilot exhaust can also be led away to prevent contamination. The environmental protection makes the 551 series an excellent choice for both dirty environments and clean rooms. The electrical enclosure protection for all models is IP65.
| Approvals | IEC, TÜV |
|---|---|
| Coil Material | Epoxy |
| Connection Port 1-2 | G1/4 |
| Connection Port 3 | G1/4 |
| Connection Thread | G1/4 |
| Differential Pressure Max | 10 |
| Differential Pressure Min | 2 |
| Flow Factor / Flow Coefficient | 12,5 |
| Flow Max l/min Double | 860 |
| Function 1 | 3/2 |
| Function 2 | Normally Closed |
| IP Class | IP65 |
| Manual operation | Yes |
| Material of body | Anodised aluminum |
| Material of seals | NBR, PUR |
| Material Plunger | Stainless steel |
|---|---|
| Material Short Call | Copper |
| Materials Internal Parts | Aluminium, POM, Stainless steel |
| Max. pressure | 10 |
| Mounting | None |
| Power Consumption | 0 |
| Response Closing | 11 |
| Response From Stroke | 14 |
| Short Circuit Protection | Yes |
| Temperature range from | -25 |
| Temperature range to | 60 |
| Throughput | 6 |
| Type of valve | Electrically controlled |
| Weight | 0.43 |
There are many different versions of series 551. It can be provided with most voltage variants, with ATEX approved coil for explosive environments and with a low power pilot valve. In addition to aluminium, housing is available in SS316 steel or brass for low temperatures, -40 °C. All electrically and air operated valves with Aluminium housing have environmental protection as standard. This means that all the internal parts are totally sealed against fluids, dust, corrosive substances etc. that may be present in the direct surroundings. Even the exhaust from the return chamber is led to the exhaust ports via an internal channel. For further protection, the pilot exhaust can also be led away to prevent contamination. The environmental protection makes the 551 series an excellent choice for both dirty environments and clean rooms. The electrical enclosure protection for all models is IP65.
The PMX fuse holder range is compact, halogen-free, and manufactured in Europe for fast availability. Available in 10×38, 14×51, and 22×58 sizes with IEC, UL, and CSA approvals, they feature silver-plated contacts, IP20 touch-safe design, and optional blown fuse indicators — giving panel builders reliable, safe, and flexible protection.
STEGO’s new loop enclosure heaters are a smart fix for condensation in control cabinets. They heat evenly, install fast with no tools, and come in a range of sizes from 10 to 150 W. They're tough, touch-safe, and even have a built-in thermostat option—everything you need to protect your gear and keep things running smoothly.
Precise, Durable Linear Measurement from Kübler
Browse our range of Kübler draw wire encoders and linear measurement systems, designed for accurate position and speed sensing in industrial and OEM applications. Built for tough environments. Trusted by automation professionals.
Designed by HORA eTec, the RKA series offers a complete lineup of aluminium terminal blocks built for both aluminium and copper conductors. Every model in the range includes push-through protection, is finger-safe, and is built with installation efficiency in mind. From compact control panels to large-scale systems, here’s the full breakdown—from the RKA 16 to the RKA 300.
In complex, high-stakes electrical environments, precision, safety, and performance aren't optional, they're essential. That’s why at Demesne Electrical, we supply solutions that go beyond compliance, empowering engineers and panel builders to build smarter, more connected systems.
One of our most trusted partners in this space is TELE Haase, an industry leader in intelligent monitoring and automation components. From load protection to digital performance sensors, the TELE range offers future-focused tools that streamline system diagnostics and improve long-term reliability.
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Think your power supply is running at 95% efficiency?
Don’t just trust the datasheet, test it. In this post, we break down how to accurately measure power supply efficiency using the right tools, setups, and real-world conditions. Essential reading for anyone working with industrial power in Ireland.
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| My favourites | Articles | Approvals | Coil Material | Connection Port 1-2 | Connection Port 3 | Connection Thread | Flow Factor / Flow Coefficient | Function 1 | Function 2 | Manual operation | Material of seals | Material Plunger | Material Short Call | Materials Internal Parts | Max. pressure | Mounting | Power Consumption | Response Closing | Response From Stroke | Short Circuit Protection | Throughput | Type of valve | Weight | Voltage AC | Voltage DC | Price | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Valve 3/2 NC. Monostable w/o coil. G1/4
Art:
G551A005MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
3/2
|
Normally Closed
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
0
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
|
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| ||
|
Valve 3/2NC G1/4. sol / spring 230/50
Art:
SCG551A005MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
3/2
|
Normally Closed
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
2.5
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
230
|
|
| ||
Art:
SCG551A005MSS2
Copied
|
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|
1/4 BSP
|
1/4 BSP
|
1/4 BSP
|
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3/2
|
Normally Closed
|
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24
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| ||
|
Valve 3/2 NC 24VDC G1/4"
Art:
SCG551A005MSS3
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
3/2
|
Normally Closed
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
3
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
|
24
|
| ||
|
Bistable valve 3/2 NC without coil
Art:
G551A006MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
3/2
|
Normally Closed
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
0
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.35
|
|
|
| ||
|
Bistable valve 3/2 NC 230 VAC G1/4"
Art:
SCG551A006MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
3/2
|
Normally Closed
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
2.5
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.35
|
230
|
|
| ||
Art:
SCG551A006MSS2
Copied
|
|
|
1/4 BSP
|
1/4 BSP
|
1/4 BSP
|
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3/2
|
Normally Closed
|
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24
|
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| ||
|
Bistable valve 3/2 NC 24VDC G1/4"
Art:
SCG551A006MSS3
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
3/2
|
Normally Closed
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
3
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.35
|
|
24
|
| ||
Valve 5/2. Monostable w/o coil. G1/4
Art:
G551A017MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/2
|
Power steering with spring return
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
0
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.35
|
|
|
| ||
|
Valve 5/2 monostable. 230VAC, G1/4"
Art:
SCG551A017MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/2
|
Power steering with spring return
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
2.5
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.35
|
230
|
|
| ||
|
Art:
SCG551A017MSS2
Copied
|
|
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|
1/4 BSP
|
|
5/2
|
Power steering with spring return
|
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|
Electrically controlled
|
|
24
|
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| ||
|
Valve, 5/2, G1/4", 24VDC
Art:
SCG551A017MSS3
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/2
|
Power steering with spring return
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
3
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.35
|
|
24
|
| ||
Valve 5/2. Bistable w/o coil. G1/4
Art:
G551A018MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/2
|
Electric
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
0
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
|
|
| ||
|
Valve 5/2. Bistable 230 VAC. G1/4"
Art:
SCG551A018MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/2
|
Electric
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
2.5
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
230
|
|
| ||
|
Art:
SCG551A018MSS2
Copied
|
|
|
G1/4
|
G1/4
|
G1/4
|
|
5/2
|
Electric
|
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6
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24
|
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| ||
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Valve 5/2. Bistable 24 VDC G1/4
Art:
SCG551A018MSS3
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/2
|
Electric
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
3
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
|
24
|
| ||
|
Valve 5/3. Closed center .w/o coil. G1/4
Art:
G551A067MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/3
|
Closed center position
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
0
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
|
|
| ||
|
Valve 5/3. Closed center. Sol/Spring 230 VAC. G1/4
Art:
SCG551A067MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/3
|
Closed center position
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
2.5
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
230
|
|
| ||
|
Art:
SCG551A067MSS2
Copied
|
|
|
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|
1/4 BSP
|
|
5/3
|
Closed center position
|
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24
|
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| ||
|
Valve 5/3. Closed center, Sol/spring. 24 VDC. G1/4"
Art:
SCG551A067MSS3
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/3
|
Closed center position
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
3
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
|
24
|
| ||
|
Valve 5/3. Open center w/o coils. G1/4
Art:
G551A068MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/3
|
Vented central position
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
0
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
|
|
| ||
|
Valve 5/3. Open center. Sol/Spring 230 VAC. G1/4"
Art:
SCG551A068MS
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/3
|
Vented central position
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
2.5
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
230
|
|
| ||
|
Art:
SCG551A068MSS2
Copied
|
|
|
|
|
1/4 BSP
|
|
5/3
|
Vented central position
|
|
|
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24
|
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| ||
|
Valve 5/3. Open center. Sol/Spring. 24 VDC. G1/4"
Art:
SCG551A068MSS3
Copied
|
IEC, TÜV
|
Epoxy
|
G1/4
|
G1/4
|
G1/4
|
12,5
|
5/3
|
Vented central position
|
Yes
|
NBR, PUR
|
Stainless steel
|
Copper
|
Aluminium, POM, Stainless steel
|
10
|
None
|
3
|
11
|
14
|
Yes
|
6
|
Electrically controlled
|
0.43
|
|
24
|
|
Select a variant in the list
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