ASCO

ASCO - Electrical controlled valve in Stainless Steel

Valve 551 in acid resistant steel, AISI 316L, with 3/2 or 5/2 function. In-line version for flow rates up to 860 l/min or NAMUR version for 700 l/min.

The valve is TÜV certified and is very suitable for tough environments since the whole series has environmental protection, meaning that all supply and exhaust air passes via the ports, which in turn means that any contamination in the surroundings cannot enter and cause damage to the internal parts of the valve. Environmental protection also makes the valve very suitable for clean room environments such as within the medical or food industries, since all exhaust can be led away. The temperature range for the valve lies between –40 °C and +60 °C, and it is available with several types of coil, both standard and ATEX class, as well as most voltage variants.

If the valve is to be used to control low operating pressure, simply turn round a seal in the valve and pressurize the pilot separately via the extra port to the pilot valve.

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  • Operational down to -40 °C
  • Function 3/2-5/2
  • Also with NAMUR interface
  • Produced in Stainless Steel for aggressive environments

Selected variant

Available in several variants

Selected variant

Technical data

General Data

Function 3/2, Power steering with spring return, Normally Closed
Connection G1/4
Flow factor / flow coefficient 12.5
IP class IP65

Material Data

Material of seals NBR
Material seat Stainless steel
Material internal parts POM, Stainless steel

Additional Data

Pressure max 10 bar
Approvals IEC, TÜV
Weight 1.19 kg
Power consumption 11.2 W
Throughput 6 mm
Type of valve Electrically controlled
Short circuit protection Yes
Voltage dc 24 V
Temperature operational min -40 °C
Temperature operational max 80 °C
Material coil Epoxy
Differential pressure max 10 bar
Differential pressure min 0 bar
Flow max 860 l/min
Manual operation Yes
Material of body Stainless steel 316L
Material plunger Stainless steel
Material short-circuit ring Silver
Material seat seal POM
Material membrane FPM
Mounting Independent

Measurements and connections

Technical illustrations

Product description

Valve 551 in acid resistant steel, AISI 316L, with 3/2 or 5/2 function. In-line version for flow rates up to 860 l/min or NAMUR version for 700 l/min.

The valve is TÜV certified and is very suitable for tough environments since the whole series has environmental protection, meaning that all supply and exhaust air passes via the ports, which in turn means that any contamination in the surroundings cannot enter and cause damage to the internal parts of the valve. Environmental protection also makes the valve very suitable for clean room environments such as within the medical or food industries, since all exhaust can be led away. The temperature range for the valve lies between –40 °C and +60 °C, and it is available with several types of coil, both standard and ATEX class, as well as most voltage variants.

If the valve is to be used to control low operating pressure, simply turn round a seal in the valve and pressurize the pilot separately via the extra port to the pilot valve.

Accessories

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Parts Function Voltage dc Manual operation Voltage AC Price
3/2, Power steering with spring return, Normally Closed
24 V
Yes
3/2, Power steering with spring return, Normally Closed
230 V
5/2, Power steering with spring return
24 V
5/2, Power steering with spring return
5/2, Electric
24 V
5/2, Electric
230 V

Selected variant

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