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Description
- Size 25
- Component series 5X
- Maximum operating pressure 315 bar
- Maximum flow 450 l/min
Features
- Sandwich plate valve for use in vertical stackings
- Porting pattern according to ISO 4401-08-08-0-05
- For the leakage-free blocking of one or two actuator ports, optional
- Various cracking pressures
- Pre-opening standard
- Check valve installation sets available individually
- Special versions on request
Product description
The isolator valve type Z2S is a releasable check valve in sandwich plate design.
It is used for the leakage-free blocking of one or two actuator ports, also in case of longer standstill times.
In direction A① to A② or B① to B②, there is a free flow; in the opposite direction, the flow is blocked.
If, for example, there is a flow through the valve in direction A① to A②, the control spool (1) is moved in the direction of the B side, opens the ball seat valve (2) and then pushes the poppet (3) off its seat. Hydraulic fluid can now flow from B➁ to B➀.
In order to allow the ball seat valve (2) to be safely closed, the control spool (1) must be hydraulically unloaded (see circuit example).
Pre-opening
- Due to the pre-opening, there is a damped decompression of the pressurized liquid. Thus, possible switching shocks are avoided.
- The two-stage set-up with an increased control open ratio means even low pilot pressure can be unloaded securely.
Type Z2S 22 ‒…
Type Z2S 22 A…
Type Z2S 22 ‒…SO40
Type Z2S 22 A…SO60
Circuit example, schematic
| 1 | Control spool, area A2 |
| 2 | Ball, area A3 |
| 3 | Poppet, area A1 |
| 4 | Stop |
| 5 | Control spool, area A4 |
| ① | component side |
| ② | plate side |
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | ||
| Z2S | 22 | – | 5X | / | * |
| 01 | Check valve, Sandwich plate design | Z2S |
| 02 | Size 25 | 22 |
| Leakage-free blocking | ||
| 03 | Channel A and B | – |
| Channel A | A | |
| Channel B | B | |
| Cracking pressure | ||
| 04 | 3 bar | 1 |
| 5 bar | 2 | |
| 7,5 bar | 3 | |
| 10 bar | 4 | |
| 05 | Component series 50 ... 59 (50 ... 59: unchanged technical data and pin assignment) | 5X |
| 06 | Surface without corrosion resistance 1) | no code |
| Seal material | ||
| 07 | NBR seals | no code |
| FKM seals | V | |
| Observe compatibility of seals with hydraulic fluid used. | ||
| Special version | ||
| 08 | Without | no code |
| Control open by external port G1/4 (only version "A" and "B") | SO40 | |
| Control spool unloaded to port T | SO60 | |
| 09 | Further details in the plain text | * |
| 1) | Corrosion-resistant surface on request: e.g. "J50" thick film passivated (DIN 50979 Fe//Zn8//Cn//To) |
Technical data
general
| Size | 25 | ||
| Weight | kg | 12 | |
| Installation position | any | ||
| Ambient temperature range | NBR seals | °C | -30 … +80 |
| FKM seals | °C | -20 … +80 | |
hydraulic
| Size | 25 | ||
| Maximum operating pressure | bar | 315 | |
| Cracking pressure (in free direction) | 3 / 5 / 7.5 / 10 bar | ||
| Maximum flow | l/min | 450 | |
| Direction of flow | see symbols | ||
| 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) 1) | Class 20/18/15 | ||
| Area ratio | With pre-opening | A3/A2 ~ 1/12.5 (see sectional drawing) | |
| Version "SO60" | A1/A4 ~ 1/9 (see sectional drawing) | ||
| 1) | 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. For the selection of the filters, see www.boschrexroth.com/filter. |
| Hydraulic fluid | Classification | Suitable sealing materials | Standards | Data sheet | |
| Mineral oils | HL, HLP, HLPD, HVLP, HVLPD | NBR, FKM | DIN 51524 | 90220 | |
| Bio-degradable | Insoluble in water | HETG | NBR, FKM | ISO 15380 | 90221 |
| HEES | FKM | ||||
| Soluble in water | HEPG | FKM | ISO 15380 | ||
| Flame-resistant | Water-free | HFDU | FKM | ISO 12922 | 90222 |
| HFDR | FKM | ||||
| Containing water | HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) | NBR | ISO 12922 | 90223 | |
| Important information on hydraulic fluids:
| |||||
(For applications outside these values, please consult us!)
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves
Symbols/Circuit diagrams
| ① | component side |
| ② | plate side |
Examples
Version "A"
Version "-"
Version "B"
Version "A…SO40"
Version "A…SO60"
Dimensions
Dimensions in mm
 |
| Required surface quality of the valve contact surface |
| ① | component side |
| ② | plate side |
| 1 | Name plate |
| 2 | Through holes for valve mounting |
| 3 | Identical seal rings for ports A, B, P, T |
| 4 | Identical seal rings for ports X, Y, L |
| 5 | Locking pins |
| 6 | Locating holes |
| 7 | Porting pattern according to ISO 4401-08-08-0-05 |
| 8 | Plug screw SW46, tightening torque MA = 70 Nm |
| Type | Cracking pressure | Leakage-free blocking in channel | L1 in mm | L2 in mm |
| "no code" | 1 + 2 | "–" | 14 | 14 |
| 3 + 4 | "–" | 44 | 44 | |
| 1 + 2 | A, B | 14 | 14 | |
| 3 + 4 | A | 44 | 14 | |
| B | 14 | 44 | ||
| "SO40" | 1 + 2 | A, B | 14 | 14 |
| 3 + 4 | A | 44 | 14 | |
| B | 14 | 44 | ||
| "SO60" | 1 + 2 | A | 14 | 14 |
| 3 + 4 | A | 44 | 14 | |
| B | 14 | 44 |
Valve mounting screws (separate order)
| Size | Quantity | Hexagon socket head cap screws | Material number |
| 25 | 6 | ISO 4762 - M12 10.9 | - |
Notice:
Length and tightening torque of the valve mounting screws must be calculated according to the components mounted under and over the sandwich plate valve.
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