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Z2FS 22-8-3X/S2
Rexroth
R900443176
Sandwich plate valve
Porting pattern according to ISO 4401-08-08-0-05
For limiting the main or pilot flow of two consumer ports
Adjustment type: Spindle with hexagon socket
For supply or discharge throttling
Corrosion-protected design
Sandwich plate valve
Porting pattern according to ISO 4401-08-08-0-05
For limiting the main or pilot flow of two consumer ports
Adjustment type: Spindle with hexagon socket
For supply or discharge throttling
Corrosion-protected design
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 10 ‒… (with pre-opening)
Type Z2S 10 ‒…SO41 (without pre-opening)
1 | Control spool, area A2 |
2 | Ball, area A3 |
4 | Poppet, area A1 |
5 | Stop |
6 | Control spool, area A4 |
① | component side |
② | plate side |
Notice:
In valves without pre-opening, sudden unloading of pent-up pressure volume may occur. Resulting switching shocks may lead to premature wear on installed components, as well as noise formation.
Notice:
Deviating from ISO 4401, port T is called TA, port T1 is called TB.
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 10 ‒… (with pre-opening)
Type Z2S 10 ‒…SO41 (without pre-opening)
1 | Control spool, area A2 |
2 | Ball, area A3 |
4 | Poppet, area A1 |
5 | Stop |
6 | Control spool, area A4 |
① | component side |
② | plate side |
Notice:
In valves without pre-opening, sudden unloading of pent-up pressure volume may occur. Resulting switching shocks may lead to premature wear on installed components, as well as noise formation.
Notice:
Deviating from ISO 4401, port T is called TA, port T1 is called TB.
01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | ||
Z2FS | 22 | 8 | – | 3X | / | * |
01 | Throttle check valve, sandwich plate design | Z2FS |
02 | Size 25 | 22 |
03 | Throttle check valve side A and B | – |
Throttle check valve side A | A | |
Throttle check valve side B | B | |
Adjustment type | ||
04 | Spindle with internal hexagon | 8 |
05 | Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions) | 3X |
06 | Supply throttling | S |
Discharge throttling | S2 | |
Corrosion resistance (outside) | ||
07 | None (valve housing primed) | no code |
Improved corrosion protection (240 h salt spray test according to EN ISO 9227) | J3 | |
Seal material | ||
08 | NBR seals | no code |
FKM seals | V | |
Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) | ||
09 | Further details in the plain text | * |
01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | ||
Z2FS | 22 | 8 | – | 3X | / | * |
01 | Throttle check valve, sandwich plate design | Z2FS |
02 | Size 25 | 22 |
03 | Throttle check valve side A and B | – |
Throttle check valve side A | A | |
Throttle check valve side B | B | |
Adjustment type | ||
04 | Spindle with internal hexagon | 8 |
05 | Component series 30 ... 39 (30 ... 39: unchanged installation and connection dimensions) | 3X |
06 | Supply throttling | S |
Discharge throttling | S2 | |
Corrosion resistance (outside) | ||
07 | None (valve housing primed) | no code |
Improved corrosion protection (240 h salt spray test according to EN ISO 9227) | J3 | |
Seal material | ||
08 | NBR seals | no code |
FKM seals | V | |
Observe compatibility of seals with hydraulic fluid used. (Other seals upon request) | ||
09 | Further details in the plain text | * |
general
Size | 25 | ||
Weight (approx.) | kg | 8 | |
Installation position | any | ||
Ambient temperature range | NBR seals | °C | -30 … +50 |
FKM seals | °C | -20 … +50 | |
hydraulic
Size | 25 | ||
Maximum operating pressure | bar | 350 | |
Maximum flow | l/min | 360 | |
Hydraulic fluid | see table | ||
Hydraulic fluid temperature range | NBR seals | °C | -30 … +80 |
FKM seals | °C | -20 … +50 | |
Viscosity range | mm²/s | 2.8 … 380 | |
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1) | Class 20/18/15 | ||
| 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 1) | NBR, FKM | ISO 15380 | 90221 |
HEES 1) | FKM | ||||
Soluble in water | HEPG 1) | FKM | ISO 15380 | ||
Flame-resistant | Water-free | HFDU (glycol base) | FKM | ISO 12922 | 90222 |
HFDU (ester base) 1) | FKM | ||||
HFDR | FKM | ||||
Containing water | HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) 1) | NBR | ISO 12922 | 90223 | |
Important information on hydraulic fluids:
| |||||
| 1) | Not recommended for corrosion-protected version "J3" (contains zinc) |
general
Size | 25 | ||
Weight (approx.) | kg | 8 | |
Installation position | any | ||
Ambient temperature range | NBR seals | °C | -30 … +50 |
FKM seals | °C | -20 … +50 | |
hydraulic
Size | 25 | ||
Maximum operating pressure | bar | 350 | |
Maximum flow | l/min | 360 | |
Hydraulic fluid | see table | ||
Hydraulic fluid temperature range | NBR seals | °C | -30 … +80 |
FKM seals | °C | -20 … +50 | |
Viscosity range | mm²/s | 2.8 … 380 | |
Maximum admissible degree of contamination of the hydraulic fluid, cleanliness class according to ISO 4406 (c) 1) | Class 20/18/15 | ||
| 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 1) | NBR, FKM | ISO 15380 | 90221 |
HEES 1) | FKM | ||||
Soluble in water | HEPG 1) | FKM | ISO 15380 | ||
Flame-resistant | Water-free | HFDU (glycol base) | FKM | ISO 12922 | 90222 |
HFDU (ester base) 1) | FKM | ||||
HFDR | FKM | ||||
Containing water | HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) 1) | NBR | ISO 12922 | 90223 | |
Important information on hydraulic fluids:
| |||||
| 1) | Not recommended for corrosion-protected version "J3" (contains zinc) |
Dimensions in mm
 |
Required surface quality of the valve contact surface |
1 | Name plate |
2 | Adjustment type "8“ Spindle for changing the flow cross-section (internal hexagon SW6)
|
3 | Through holes for valve mounting |
4 | Identical seal rings for ports A, B, P, T |
5 | Identical seal rings for ports X, Y, L |
6 | Locking pin (included in the scope of delivery) |
7 | Hexagon SW22, tightening torque MA = 25 Nm |
8 | Porting pattern according to ISO 4401-08-08-0-05 |
9.1 | Plug screw with version "B" |
9.2 | Plug screw with version "A" |
Size | Quantity | Hexagon socket head cap screws | Material number |
25 | 6 | ISO 4762 - M12 - 10.9-flZn-240h-L | - |
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.
Dimensions in mm
| |
Required surface quality of the valve contact surface |
1 | Name plate |
2 | Adjustment type "8“ Spindle for changing the flow cross-section (internal hexagon SW6)
|
3 | Through holes for valve mounting |
4 | Identical seal rings for ports A, B, P, T |
5 | Identical seal rings for ports X, Y, L |
6 | Locking pin (included in the scope of delivery) |
7 | Hexagon SW22, tightening torque MA = 25 Nm |
8 | Porting pattern according to ISO 4401-08-08-0-05 |
9.1 | Plug screw with version "B" |
9.2 | Plug screw with version "A" |
Size | Quantity | Hexagon socket head cap screws | Material number |
25 | 6 | ISO 4762 - M12 - 10.9-flZn-240h-L | - |
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.
