ASCO

ASCO - Electrical controlled 1/4" valve, 860 l/min

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.

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  • Function 3/2-5/2-5/3
  • For temperatures down to -25 °C
  • Wide selection of voltages
  • Coil service life 30,000 operating hours

Selected variant

Selected variant

Technical data

General Data

Connection G1/4
Flow factor / flow coefficient 12,5
IP class IP65

Material Data

Material of seals NBR, PUR
Material internal parts Aluminium, POM, Stainless steel

Additional Data

Pressure max 10 bar
Close delay 11 ms
Approvals IEC, TÃœV
Weight 0,43 kg
Mounting None
Manual operation Yes
Connection port 3 G1/4
Function 2 Normally Closed
Response time off 14 ms
Material short-circuit ring Copper
Short circuit protection Yes
Differential pressure min 2 bar
Temperature operational max 60 °C
Material plunger Stainless steel
Material plunger tube Stainless steel
Power consumption 0 W
Function 1 3/2
Material coil Epoxy
Type of valve Electrically controlled
Flow max 860 l/min
Temperature operational min -25 °C
Differential pressure max 10 bar
Throughput 6 mm
Material of body Anodised aluminum
Connection port 1-2 G1/4

Product description

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.

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Parts Connection Flow factor / flow coefficient Material of seals Material internal parts Pressure max Close delay Approvals Weight Mounting Manual operation Connection port 3 Function 2 Response time off Material short-circuit ring Short circuit protection Material plunger Material plunger tube Power consumption Function 1 Material coil Type of valve Throughput Connection port 1-2 Voltage AC Voltage dc Price
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Normally Closed
14 ms
Copper
Yes
Stainless steel
Stainless steel
0 W
3/2
Epoxy
Electrically controlled
6 mm
G1/4
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Normally Closed
14 ms
Copper
Yes
Stainless steel
Stainless steel
2,5 W
3/2
Epoxy
Electrically controlled
6 mm
G1/4
230 V
1/4 BSP
1/4 BSP
Normally Closed
3/2
1/4 BSP
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Normally Closed
14 ms
Copper
Yes
Stainless steel
Stainless steel
3 W
3/2
Epoxy
Electrically controlled
6 mm
G1/4
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,35 kg
None
Yes
G1/4
Normally Closed
14 ms
Copper
Yes
Stainless steel
Stainless steel
0 W
3/2
Epoxy
Electrically controlled
6 mm
G1/4
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,35 kg
None
Yes
G1/4
Normally Closed
14 ms
Copper
Yes
Stainless steel
Stainless steel
2,5 W
3/2
Epoxy
Electrically controlled
6 mm
G1/4
230 V
1/4 BSP
1/4 BSP
Normally Closed
3/2
1/4 BSP
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,35 kg
None
Yes
G1/4
Normally Closed
14 ms
Copper
Yes
Stainless steel
Stainless steel
3 W
3/2
Epoxy
Electrically controlled
6 mm
G1/4
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,35 kg
None
Yes
G1/4
Power steering with spring return
14 ms
Copper
Yes
Stainless steel
Stainless steel
0 W
5/2
Epoxy
Electrically controlled
6 mm
G1/4
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,35 kg
None
Yes
G1/4
Power steering with spring return
14 ms
Copper
Yes
Stainless steel
Stainless steel
2,5 W
5/2
Epoxy
Electrically controlled
6 mm
G1/4
230 V
1/4 BSP
Power steering with spring return
5/2
Electrically controlled
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,35 kg
None
Yes
G1/4
Power steering with spring return
14 ms
Copper
Yes
Stainless steel
Stainless steel
3 W
5/2
Epoxy
Electrically controlled
6 mm
G1/4
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Electric
14 ms
Copper
Yes
Stainless steel
Stainless steel
0 W
5/2
Epoxy
Electrically controlled
6 mm
G1/4
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Electric
14 ms
Copper
Yes
Stainless steel
Stainless steel
2,5 W
5/2
Epoxy
Electrically controlled
6 mm
G1/4
230 V
G1/4
G1/4
Electric
5/2
6 mm
G1/4
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Electric
14 ms
Copper
Yes
Stainless steel
Stainless steel
3 W
5/2
Epoxy
Electrically controlled
6 mm
G1/4
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Closed center position
14 ms
Copper
Yes
Stainless steel
Stainless steel
0 W
5/3
Epoxy
Electrically controlled
6 mm
G1/4
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Closed center position
14 ms
Copper
Yes
Stainless steel
Stainless steel
2,5 W
5/3
Epoxy
Electrically controlled
6 mm
G1/4
230 V
1/4 BSP
Closed center position
5/3
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Closed center position
14 ms
Copper
Yes
Stainless steel
Stainless steel
3 W
5/3
Epoxy
Electrically controlled
6 mm
G1/4
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Vented central position
14 ms
Copper
Yes
Stainless steel
Stainless steel
0 W
5/3
Epoxy
Electrically controlled
6 mm
G1/4
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Vented central position
14 ms
Copper
Yes
Stainless steel
Stainless steel
2,5 W
5/3
Epoxy
Electrically controlled
6 mm
G1/4
230 V
1/4 BSP
Vented central position
5/3
24 V
G1/4
12,5
NBR, PUR
Aluminium, POM, Stainless steel
10 bar
11 ms
IEC, TÜV
0,43 kg
None
Yes
G1/4
Vented central position
14 ms
Copper
Yes
Stainless steel
Stainless steel
3 W
5/3
Epoxy
Electrically controlled
6 mm
G1/4
24 V

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