Артикул: RX7252
2-way cartridge valves, directional functions, intermediate cover LFA..D19 (high-pressure)
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Description
Features
- Control cover for directional function
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 simultaneously 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 pressuredependent. This way, three crucial pressurized areas A1, A2, A3 are realized for the function. The area at the valve seat A1 is considered 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. In case of pressurization of area A3 by pilot oil discharge from channel B or external pilot oil supply, channel A is blocked in a leakage-free manner.
Type code
load errorTechnical data
| 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) |
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
| Mineral oils | HL, HLP | H-ECOPUR | DIN 51524 | 90220 | |
| Bio-degradable | Insoluble in water | HETG | H-ECOPUR | ISO 15380 | 90221 |
| HEES | H-ECOPUR | ||||
| Flame-resistant | Water-free | HFDU (glycol base) | H-ECOPUR | ISO 12922 | 90222 |
| HFDU (ester base) | H-ECOPUR | ||||
| Important information on hydraulic fluids:
Bio-degradable and flame-resistant: If this hydraulic fluid is used, small amounts of dissolved zinc may get into the hydraulic system. | |||||
(For applications outside these values, please consult us!)
Diagrams/characteristic curves
| Orifices (conical) | |||||||||
| Orifice Ø in mm | Order numbers | Material numbers | |||||||
| M6 conical | M8 x 1 conical | G 1/8 conical | G 1/4 conical | G 3/8 conical | G 1/2 conical | G 3/4 conical | G 1 conical | ||
| – | 00 | – | – | – | – | – | – | - | – |
| 0,5 | 05 | R913040356 | R913017600 | R913030187 | R913040456 | – | – | - | – |
| 0,6 | 06 | R913040358 | R913017605 | R913017606 | R913020197 | – | – | - | – |
| 0,7 | 07 | R913040360 | R913017609 | R913046092 | – | – | – | - | – |
| 0,8 | 08 | R913029447 | R913017614 | R913017616 | R913017615 | R913040481 | R913040499 | - | – |
| 1,0 | 10 | R913019186 | R913017621 | R913024679 | R913017622 | R913040484 | R913040500 | - | – |
| 1,2 | 12 | R913040362 | R913017627 | R913017629 | R913017628 | R913040486 | R913040501 | - | – |
| 1,5 | 15 | R913028337 | R913017637 | R913017639 | R913017638 | R913040488 | R913028317 | - | – |
| 1,8 | 18 | R913030186 | R913017644 | R913017646 | R913017645 | R913040489 | R913045913 | - | – |
| 2,0 | 20 | R913029870 | R913017651 | R913040450 | R913017652 | R913028417 | R913028336 | R913017835 | – |
| 2,5 | 25 | R913032543 | R913035796 | R913017656 | R913019582 | R913040493 | R913040502 | - | – |
| 3,0 | 30 | R913040368 | R913017661 | R913017663 | R913017662 | R913018266 | R913040503 | R913040476 | R913040467 |
| 3,5 | 35 | – | R913017667 | R913040452 | R913040463 | R913028318 | R913019856 | R913040477 | R913040469 |
| 4,0 | 40 | – | R913017670 | R913027078 | R913040464 | R913018265 | R913029168 | R913040478 | R913040470 |
| 4,5 | 45 | – | R913046571 | R913017671 | R913040465 | – | R913040506 | R913043806 | – |
| 5,0 | 50 | – | – | R913017673 | R913040468 | R913023871 | R913019857 | - | R913040471 |
| 5,5 | 55 | – | – | R913027077 | – | R913040495 | R913053659 | R913040479 | – |
| 6,0 | 60 | – | – | – | – | R913023870 | R913028418 | R913017674 | R913020247 |
| 7,0 | 70 | – | – | – | R913040461 | R913017675 | R913040509 | - | – |
| 7,5 | 75 | – | – | – | – | R913023430 | – | R913034192 | R913018328 |
| 8,0 | 80 | – | – | – | – | R913046570 | R913040510 | R913040482 | R913020246 |
| closed | 99 | R913019128 | R913019129 | R913019137 | R913019136 | R913019138 | R913019139 | R913032612 | R913019140 |
Other orifices upon request.
| Plug screws | |
| Thread | Tightening torque MA in Nm ±10 % |
| G 1/8 | 18 |
| G 1/4 | 45 |
| G 3/8 | 83 |
| G 1/2 | 120 |
| G 3/4 | 175 |
| G 1 | 270 |
Symbols/Circuit diagrams
Dimensions
load errorInformation
load errorDownloads
 | 2-Wege-Einbauventile, Druck- und Wegefunktionen - Hochdruckbaureihe Data Sheet | RD21030 | 2017-07-01 | German | PDF | 2.4MB Product Groups: Logic elements - directional function, Logic elements - pressure function Typ LC (Einbauventile), Typ LFA (Steuerdeckel) |
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