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

Approvals IEC, TÜV
Close delay 11 ms
Connection G1/4
Connection port 1-2 G1/4
Connection port 3 G1/4
Differential pressure max 10 bar
Differential pressure min 2 bar
Flow factor / flow coefficient 12,5
Flow max 860 l/min
Function 1 3/2
Function 2 Normally Closed (SPST)
IP class IP65
Manual operation Yes
Material coil Epoxy
Material internal parts Aluminium, POM, Stainless steel
Material of body Anodised aluminum
Material of seals NBR, PUR
Material plunger Stainless steel
Material plunger tube Stainless steel
Material short-circuit ring Copper
Mounting None
Power consumption 0 W
Pressure max 10 bar
Response time off 14 ms
Short circuit protection Yes
Temperature operational max 60 °C
Temperature operational min -25 °C
Throughput 6 mm
Type of valve Electrically controlled
Weight 0,43 kg

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

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