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Description
- Standard series
- Size 16 … 40
- Component series 7X
- Maximum operating pressure 420 bar
- Maximum flow 25000 l/min
Features
- With remote control port
- With stroke limitation
Product description
2-way cartridge valves are elements that have been designed for a compact block design. The power section with connections A and B is installed into the control block in a receiving hole standardized according to ISO 7368 and closed with a cover. In most cases, the cover is also the connection from the control side of the power section to the pilot control valves.
By control with respective pilot control valves, the power section can be applied for pressure, directional and throttle functions or a combination of these functions. Particularly efficient solutions are realized by adjustment of the size to various flows of the individual ways of an actuator. The application of power sections of elements for multiple functions is very cost-effective.
2-way cartridge valves generally consist of control cover (1) and installation kit (2). The control cover contains the control bores and optionally a stroke limitation function, a hydraulically controlled directional seat valve or a shuttle valve according to the required overall function. Additionally, electrically operated directional spool or seat valves can be installed at a control cover. The installation kit consists of a bushing (3), ring (4) (only up to NG32), valve poppet (5), optionally with damping nose (6) or without damping nose (7) as well as closing spring (8).
The function of 2-way cartridge valves is pressure-dependent. This way, three crucial pressurized areas are realized for the function. A1, A2, A3. The area at valve seat A1 is observed as 100 %. Depending on the version, the annulus area A2 realized by grading is 7 % or 50 % of area A1. The area ratio A1 : A2 is respectively either 14.3 : 1 or 2 : 1. The area A3 is identical to the sum of areas A1 + A2. Due to the different area ratios A1 : A2 and the resulting different annulus areas (A2), the area A3 is one time 107 % and another time 150 % of the area A1 at the seat, which is observed as 100 %.
In general, the following applies:
The areas A1 and A2 are effective in opening direction. The area A3 and the spring are effective in closing direction. The direction of action of the resulting force from the opening and closing forces determines the spool position of the 2-way cartridge valve.
The 2-way cartridge valves can be passed from A to B or from B to A. Pressurization of area A3 by pilot oil discharge from channel B or external pilot oil supply, channel A is blocked without leakage.
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 09 | 09 | ||
| LFA | H3 | – | 7X | / | F | X** |
| 01 | Control cover | LFA |
| 02 | Size 16 | 16 |
| Size 25 | 25 | |
| Size 32 | 32 | |
| Size 40 | 40 | |
| Version | ||
| 03 | Control cover with stroke limitation (lockable rotary knob) and remote control port | H3 |
| 04 | Component series 70 … 79 (70 … 79: unchanged installation and connection dimensions) | 7X |
| Remote control port | ||
| 05 | With remote control port | F |
| Nozzle fitting | ||
| 06 | Orifice in channel X 1) | X** |
| Corrosion resistance | ||
| 07 | None | no code |
| Improved corrosion protection (240 h salt spray test according to EN ISO 9227) | J3 | |
| Seal material (observe compatibility of seals with hydraulic fluid used, see "Technical data") | ||
| 08 | NBR seals | no code |
| FKM seals | V | |
| Connections, mounting and plug screws | ||
| 09 | Mounting screws, metric; connections inch thread | no code |
| Mounting screws UNC; connections UNF | /12 | |
| 1) | This orifice is designed as screw-type orifice. If an orifice is to be installed, the respective code letter with the orifice Ø in 1/10 mm has to be entered in the type designation. Example: A12 = Orifice with Ø1.2 mm in channel A. |
Notice:
Up to NG32, control cover "H" can also be combined with pressure logic inserts type LC..DB..7X. From NG40, special covers type LFA...H.../FDR can be used (see cartridge valve type LC "Information").
Notices:
- More ordering codes of orifices, see "Accessories"
- Additional functions with special numbers see "Information".
Technical data
general
| Size | 16 | 25 | 32 | 40 | ||
| Weight | kg | 1.2 | 2.3 | 4 | 7.4 | |
| Ambient temperature range | NBR seals | °C | -30 … +60 | |||
| FKM seals | °C | -20 … +60 | ||||
| MTTFD values according to EN ISO 13849 1) | Years | 150 | ||||
| 1) | For further details, see data sheet 08012 |
hydraulic
| Size | 16 | 25 | 32 | 40 | ||
| Maximum operating pressure | bar | 420 | ||||
| Maximum flow 1) | l/min | 25000 | ||||
| Hydraulic fluid | see table "Hydraulic fluid" | |||||
| Hydraulic fluid temperature range | NBR seals | °C | -30 … +80 | |||
| FKM seals | °C | -20 … +80 | ||||
| Viscosity range | mm²/s | 2.8 … 500 | ||||
| Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 2) | Class 20/18/15 | |||||
| 1) | NG-dependent; see characteristic curves |
| 2) | The cleanliness classes specified for the components must be adhered to in hydraulic systems. Effective filtration prevents faults and simultaneously increases the life cycle of the components. |
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
| Mineral oils | HL, HLP, HLPD, HVLP, HVLPD | NBR, FKM | DIN 51524 | 90220 | |
| Bio-degradable 1) | Insoluble in water | HETG | NBR, FKM | ISO 15380 | 90221 |
| HEES | FKM | ||||
| Soluble in water | HEPG | FKM | ISO 15380 | ||
| Flame-resistant | Water-free | HFDU (glycol base) | FKM | ISO 12922 | 90222 |
| HFDU (ester base) 1) | FKM | ||||
| Containing water 1) | HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) | NBR | ISO 12922 | 90223 | |
| Important information on hydraulic fluids:
| |||||
| 1) | Not recommended for corrosion-protected version "J3" (contains zinc) |
(For applications outside these values, please consult us!)
Symbols/Circuit diagrams
Type LFA . H…/F
Type LFA . H…/FX**
Dimensions
Size 16 … 40
Dimensions in mm
| 1 | Name plate at NG16, 25, 32 |
| 2 | Name plate at NG40 |
| 3 | Port X optionally as threaded port |
| NG | D1 | D2 | H1 | H2 | H3 | H7 max 1) | ▢ L1 | L2 | L3 | T1 |
| mm | mm | mm | mm | mm | mm | mm | mm | |||
| 16 | G 1/8 | M6 | 35 | 12 | 15 | 155 | 65 | 32.5 | 4 | 8 |
| 25 | G1/4 | M6 | 40 | 16 | 24 | 160 | 85 | 42.5 | 5 | 12 |
| 32 | G1/4 | M6 | 60 | 16 | 28 | 180 | 100 | 50 | 5 | 12 |
| 40 | G1/2 | M8 x 1 | 100 | 30 | 32 | 234 | 125 | 72 | 5 | 14 |
| 1) | Maximum dimension |
Mounting screws (included in the scope of delivery)
| Hexagon socket head cap screws ISO 4762 - 10.9-flZn/nc/480h/C 1) | ||
| Size | Quantity | Tightening torque MA in Nm ±10 % |
| 16 | 4 | 30 |
| 25 | 4 | 100 |
| 32 | 4 | 240 |
| 40 | 4 | 480 |
| 50 | 4 | 480 |
| 63 | 4 | 1600 |
| 80 | 8 | 800 |
| 100 | 8 | 1600 |
| 125 | 8 | 3100 |
| 160 | 12 | 5000 |
| 1) | Hexagon socket head cap screws UNC, see data sheet 08936 |
Notices:
- The specified tightening torques stated are guidelines when using screws with the specified friction coefficients and when using a manual torque wrench (tolerance ± 10%).
- The specified tightening torques were calculated with total friction coefficient μtotal = 0.09 ... 0.14; adjust in case of modified surfaces.
- Supplied mounting screws are only suitable for direct assembly on a block. If an intermediate cover is used, mounting screws have to be designed accordingly longer.
Connection dimensions according to ISO 7368
Size 16 ... 63
Dimensions in mm
| NG | 16 | 25 | 32 | 40 | |
| ØD5 1) | M8 | M12 | M16 | M20 | |
| ØD6 | mm | 4 | 6 | 8 | 10 |
| ØD7H13 | mm | 4 | 6 | 6 | 6 |
| H4 | mm | 20 | 25 | 35 | 45 |
| L1 | mm | 65 80 | 85 | 102 | 125 |
| L2 | mm | 46 | 58 | 70 | 85 |
| L3 | mm | 23 | 29 | 35 | 42.5 |
| L4 | mm | 25 | 33 | 41 | 50 |
| L5 | mm | 10.5 | 16 | 17 | 23 |
| 1) | Mounting thread for version "/12" see data sheet 08936 |
| 1 | Bore for locating pin |
| 2 | 80 mm only at control cover for directional valve set-up NG16 (axis X–Y bore) |
Notice:
The dimensions are nominal dimensions which are subject to tolerances.
Information
load errorDownloads
 | 2-way cartridge valves, directional functions Data Sheet | RE21010 | 2017-05-01 | English | PDF | 3.2MB Product Groups: Logic elements - directional function Type LC (cartridge valves), type LFA (control cover) |
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