Solenoid , pneumatic and manual valves
Solenoid and pneumatic valves are used in both pneumatic and hydraulic distribution systems, most commonly in seat valve or spool configurations. It is used to control pneumatic cylinders. The valves have different functions such as 5/3, 3/2, 5/2 and can be electrically operated. The most common solenoid valves are two-way, two-position seat valves that simply open and close to allow flow when their coil is energized. However, we offer many more designs, just use the subcategories of our e-shop or read more in the advisory "How to choose the right valve".
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Schematic valve markings
- each valve position is symbolized by its own square, in which the connection of inlets, outlets and outlets in that position is drawn
(i.e.: if the mark contains 2 squares, it is a 2-position valve, if it contains 3 squares, it is a 3-position valve, etc.) - the numbering or letter designation of the connections is always at the square symbolizing the basic position
- arrows connecting the connections indicate the direction of air flow, if the arrows are on both sides, the valve can be used for flow in both directions
- the air inlet and outlets are usually placed on the lower side of the square, the outlets from the valves are placed on the upper side of the square
- symbols are placed on the side of the square to indicate the method of switching between positions, with the fact that whichever square is drawn becomes active when the signal arrives (as if it had moved to the place of the square of the basic position)
Methods of switching between valve positions |
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valve return by spring |  |
paw |
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coil, electric control |  |
lever with detent |
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pneumatic signal |  |
pedal |
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electromagnetic signal |  |
pedal with detent |
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boletus |  |
allusion |
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mushroom with arrest |  |
pulley |
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button |  |
hinged pulley |
Examples of valve brands
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On this mark we see 2 squares, so it is a two position valve. The marker shows outlets 2 and 4 (top), outlets 3 and 5 and inlet 1 (bottom). There are 5 ways in total, so it is a 5/2 valve. The numerical designation of the connections is at the right square, so this is the basic position of the valve. In this ; position, air from inlet 1 goes to outlet 2, while outlet 4 is connected to exhaust 5. Exhaust 3 is closed. On the left side of the symbol is the pulley control, so it is a mechanically operated valve. When the pulley is actuated, the valve is repositioned according to the left square (adjacent to the pulley symbol). In the second position, inlet 1 is connected to outlet 4 and in turn outlet 2 is connected to vent 3, outlet 5 is now closed. By pressing the pulley, outputs 2 and 4 are therefore switched. There is a spring on the right side of the symbol, which means that the valve returns to the base position independently, using a mechanical spring. |
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The second example shows a two-position valve again. At the basic position we see the numerical markings 1-inlet, 2-outlet and 3-outlet. So it is a three-way valve (signals 12 and 10 are not included in the paths). In the basic position the inlet is closed and the outlet is connected to the exhaust. Signal 12 (arrow indicates air signal) from the left side moves the valve to the position according to the left square, i.e. the input is connected to output 2 (therefore the signal is marked 12 = 10 + 2). After the signal 12 has disappeared, the valve remains outside the basic position (bistable function) and stays there until the signal 10 comes from the right, which activates the basic position (10 = 10 + 0 i.e. closes the valve). You can still see the miniature button symbols on the sides. This is a representation of the so-called auxiliary manual control and the valve can be repositioned in an emergency, e.g. with a screwdriver. |
Marking of connection threads
On valve labels or schematic markings, you will often find letter or number designations for the individual connection threads. What do these markings mean? They describe whether it is an inlet, outlet, outflow or control connection. In practice, both markings are possible, but the more modern marking is by numbers.
Marking of connection threads |
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| Number | Letter | Importance |
| 1 | P | air supply |
| 2, 4, 6 and other even numbers | A, B, C... | outputs from the valve |
| 3, 5, 7 and other odd numbers | R, S, T... | vent chambers of the valve |
| 10 + a number (10, 12, 14...) |
X, Y, Z | control signal (in the numeric marking, the second digit denotes the output that is activated by the signal e.g. 14 means that the signal lets air in at output 4, the number 10 indicates that the valve is closed ) |
Main types of valves:
- electromagnetic valves
- solenoid valves
- pneumatically operated valves
- manually operated valves
- foot valves
The most important parameters for valve selection:
- function
- threaded connection
- work pressure
- working temperature
- brightness
- flow
- power input of the coil
*Today's complex valves are not just about the open and close function. The function diagrams we add to each product photo will help you choose.
You may still find it useful when choosing automation technology:
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Solenoid valves; 1/8" thread up to 650 l/min
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Pneumatic valves 1/8"; 1/8" thread up to 650 l/min
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1/8" valve accessories; spools, connectors and plates
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Solenoid valves; 1/4" thread up to 1,100 l/min
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Pneumatic valves; 1/4" thread up to 1,100 l/min
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1/4" valve accessories; spools, connectors and plates
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Solenoid valves; 1/2" thread up to 2,900 l/min
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Pneumatic valves; 1/2" thread up to 2 900 l/min
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Valve accessories 1/2"; spools and connectors
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Solenoid valves; standard according to ISO 5599/1
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Pneumatic valves; standard according to ISO 5599/1
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ISO valve accessories; coils, connectors and plates
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Solenoid valves; NAMUR up to 1 000 l/min
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Foot valves; pedal valves
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Control attachments; for base valves
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Manually operated valves; 1/8" thread up to 1,100 l/min
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Manually operated valves; 1/4" thread up to 1,700 l/min
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Manual base valves; for 4 mm coupling extension
Product sorting
List of products
Manually operated valve - version 5/2, 180° lever with locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal resin,...
A1E solenoid valve with 1/8" connection threads in 5/2 coil/spring design with flow rate 650 Nl/min and DN 6.5 mm clearance. Coil ASA12 and connector A12209 are not included....
A1E solenoid valve with 1/8" connection threads in 3/2 NC version with flow rate 650 Nl/min and DN 6,5 mm clearance. Coil ASA12 and connector A12209 are not included. For...
Manually operated valve - version 5/3, 90° lever with locking, centre position closed. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
A1P pneumatic valves with 1/8" threads in 3/2 NC version with a clearance of 6.5 mm and a flow rate of 650 l/min. For stand-alone or battery mounting, use A1B1 base plates....
A1E solenoid valve with 1/8" connection threads in 3/2 NO version with flow rate 650 Nl/min and DN 6,5 mm clearance. Coil ASA12 and connector A12209 are not included. For...
Manually operated valve - version 5/3, 90° lever with locking, centre position vented. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - version 5/2, mushroom, green without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal...
Manually operated valve - version 5/2, recessed button, black, without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
A1E solenoid valve with 1/8" connection threads in 3/2 coil/coil version with flow rate 650 Nl/min and DN 6,5 mm clearance. Coil ASA12 and connector A12209 are not included. For...
Solenoid valve A1E with 1/8" connection threads in 3/2 NC version, auxiliary pressure supply with flow rate 650 Nl/min and DN 6,5 mm clearance. Coil ASA12 and connector A12209...
A1E solenoid valve with 1/8" connection threads in 5/2 coil/coil version with flow rate 650 Nl/min and DN 6,5 mm clearance. Coil ASA12 and connector A12209 are not included. For...
Manually operated valve - version 5/2, 90° lever with locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal resin,...
Manually operated valve - version 3/2 NC, mushroom, black without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - version 3/2, lever 180°, 2 positions with locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
A1E solenoid valve with 1/8" connection threads in 5/3 middle position closed with flow rate 650 Nl/min and DN 6,5 mm clearance. Coil ASA12 and connector A12209 are not...
Manually operated valve - version 5/2, push button with locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal resin,...
Manually operated valve - version 5/3, 90° lever without locking, centre position vented. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
A1P pneumatic valves with 1/8" threads in 5/3 middle position vented with a clearance of 6.5 mm and a flow rate of 650 l/min. For stand-alone or battery mounting, use A1B1 base...
Solenoid valve A1E with 1/8" connection threads in 5/2 coil/spring design, auxiliary pressure supply with flow rate 650 Nl/min and DN 6.5 mm clearance. Coil ASA12 and connector...
A1P pneumatic valves with 1/8" threads in 3/2 NO version with a clearance of 6.5 mm and a flow rate of 650 l/min. For stand-alone or battery mounting, use A1B1 base plates....
A1P pneumatic valves with 1/8" threads in 3/2 air/air version with a clearance of 6.5 mm and a flow rate of 650 l/min. For stand-alone or battery mounting, use A1B1 base plates....
A1P pneumatic valves with 1/8" threads in 5/2 air/spring version with a clearance of 6.5 mm and a flow rate of 650 l/min. For stand-alone or battery mounting, use A1B1 base...
A1P pneumatic valves with 1/8" threads in 5/2 air/air version with a clearance of 6.5 mm and a flow rate of 650 l/min. For stand-alone or battery mounting, use A1B1 base plates....
Manually operated valve - version 5/3, 90° lever without lock, centre position under pressure. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used:...
Manually operated valve - version 3/2 NC, mushroom, green without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valves - version 3/2, recessed button black, without locking. Working pressure 0 -10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valves - version 3/2, recessed button red, without locking. Working pressure 0 -10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - version 3/2, green recessed button, without locking. Working pressure 0 -10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - version 3/2 NC, mushroom, black without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - version 3/2 NC, mushroom, red without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal...
Manually operated valve - version 3/2, lever 180°, 2 positions with spring. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - design 3/2 NC, push button, 2 positions with spring. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - design 3/2 NC, push button, 2 positions with locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - design 5/2, recessed button, red, without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - version 5/2, recessed button, green, without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body -...
Manually operated valve - version 5/2, mushroom, black without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal...
Manually operated valve - version 5/2, mushroom, red without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal...
Manually operated valve - version 5/2, 90° lever without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal resin,...
Manually operated valve - version 5/2, push button without locking. Working pressure 0 - 10 bar, working temperature: -10 to +80 °C, materials used: body - aluminium/acetal...