Артикул: RX7444
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Twin throttle check valves, direct operated Z2FS 6...XC
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Description
- Size 6
- Component series 4X
- Maximum operating pressure 315 bar
- Maximum flow 80 l/min
- Area of application according to directive 94/9/EG I M2, II 2G, II 2D
- Type of protection of the valve: c (EN 13463-5:2004-03)
Features
- Sandwich plate valve
• Porting pattern according to ISO 4401-03-02-0-05 with locking pin and locating hole
• Setscrew with lock nut and protective cap
• For the main or pilot flow limitation of two actuator ports
• For supply or discharge throttling
Product description
Valves type Z2FS 6...XC are twin throttle check valves in sandwich plate design.
They serve for main or pilot flow limitation of one or two actuator ports.
Two throttle check valves aligned symmetrically to each other limit flows in one direction and allow free return flow in the opposite direction.
In case of supply throttling, the hydraulic fluid is directed through channel A1 via throttling point (1) formed by the valve seat (2) and the throttle spool (3) to actuator A2. The throttle spool (3) can be axially adjusted via the setscrew (4) for adjustment of the throttling point (1).
The hydraulic fluid return flow from actuator B2 displaces the valve seat (2) against the spring (5) in the direction of the throttle spool (3) and enables the unobstructed flow via the check valve from B2 to B1.
The same applies for flow into the opposite direction. Depending on the type, the throttling effect may occur in supply or discharge.
Main flow limitation (Version ..2Q..)
For actuator velocity adjustment (main flow limitation), the twin throttle check valve is installed between the directional valve and the subplate.
Pilot flow limitation (Version ..1Q..)
With pilot-operated directional valves, the twin throttle check valve can be applied for switching time adjustment (pilot flow limitation). In this case, it is installed between the pilot control valve and the main valve.
Type Z2FS 6 –2–4X/S...XC
(Supply throttling)
Type code
| 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | |||
| Z2FS | 6 | 2 | – | 4X | / | – | XC | J |
| 01 | Twin throttle check valves, direct operated | Z2FS |
| 02 | Size 6 | 6 |
| 03 | Throttle check valve side A and B | – |
| Throttle check valve side A | A | |
| Throttle check valve side B | B | |
| Adjustment element | ||
| 04 | Setscrew with lock nut and protective cap | 2 |
| 05 | Component series 40 … 49 (40 … 49: unchanged installation and mounting dimensions) | 4X |
| 06 | Supply throttling on side A and B (...–4X/S) | S |
| Supply throttling on side A (...A–4X/S) | ||
| Supply throttling on side B (...B–4X/S) | ||
| Discharge throttling on side A and B (...–4X/S2) | S2 | |
| Discharge throttling on side A (...A–4X/S2) | ||
| Discharge throttling on side B (...B–4X/S2) | ||
| 07 | with fine adjustment | 1Q |
| Standard version | 2Q | |
| 08 | Valves in explosion-protected design; for details, see "Information on explosion protection", in chapter "Technical data" | XC |
| 09 | Seawater protection | J |
| 10 | NBR seals | no code |
| FKM seals | V | |
| Observe compatibility of seals with hydraulic fluid used. | ||
Included in the scope of delivery:
Valve operating instructions with declaration of conformity in part III
Technical data
general
| Size | 6 | ||
| Installation position | any | ||
| Ambient temperature range | NBR seals | °C | -30 … +80 |
| FKM seals | °C | -20 … +80 | |
| Storage temperature range | NBR seals | °C | -30 ... +80 |
| FKM seals | °C | -20 ... +80 | |
| Weight | kg | 0.8 | |
| Valve body surface protection | Galvanized and passivated olive-green FeZn12Dd DIN 50961 | ||
hydraulic
| Size | 6 | ||
| Maximum primary operating pressure | bar | 315 | |
| Maximum flow | l/min | 80 | |
| Maximum leakage at 315 bar pressure differential 1) | l/min | 1 | |
| Hydraulic fluid | Mineral oil (HL, HLP) according to DIN 51524; other hydraulic fluids upon request; ignition temperature > 180 °C | ||
| Hydraulic fluid temperature range | NBR seals | °C | -30 … +80 |
| FKM seals | °C | -20 … +80 | |
| Viscosity range 2) | mm²/s | 10 … 800 | |
| Maximum admissible degree of contamination of the hydraulic fluid 3) | Class 20/18/15 according to ISO 4406 (c) | ||
| 1) | over the closed throttle |
| 2) | preferably 30 ... 60 mm²/s |
| 3) | 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. |
Information on explosion protection
| Range of application as per Directive 94/9/EG | IM2, II2G | II2D | |
| Type of protection valve | c (EN 13463-5:2004-03) | ||
| Maximum surface temperature | °C | - | 100 1) |
| Temperature class | T4 | - | |
| Protection class | - | IP67 | |
| 1) | Due to the occurring surface temperatures, the European standards ISO 13732-1 and EN 982 need to be adhered to! (contact protection) |
Diagrams/characteristic curves
(measured with HLP46, ϑOil = 40 ±5 °C)
Δp-qV characteristic curves for Z2FS 6 ..–4X/.2QXCJ
| 1) | Right stop |
| 2) | Left stop |
Δp-qV characteristic curves for Z2FS 6 ..–4X/.1QXCJ
| 1) | Right stop |
| 2) | Left stop |
Δp-qV characteristic curves for Z2FS 6 ... via open check valve with closed throttle
Symbols/Circuit diagrams
Z2FS 6 –..–4X/S...XC (supply throttling)
Z2FS 6 –..–4X/S2...XC (discharge throttling)
Z2FS 6 A..–4X/S2...XC (discharge throttling)
Z2FS 6 B..–4X/S...XC (supply throttling)
| ➀ | component side |
| ➁ | plate side |
Dimensions
Type Z2FS 6 –2–4X/S...XC
(Supply throttling)
Dimensions in mm
 |
| Required surface quality of the valve contact surface |
| 1 | Name plate |
| 2a | Protective cap SW20 |
| 2b | Internal hexagon setscrew SW5 and lock nut SW10 |
| 3 | Seal ring plate with identical seal rings for ports P, A, B, T |
| 4 | Valve mounting bores |
| 5 | Porting pattern according to ISO 4401-03-02-0-05 with locating hole and locking pin Ø3 mm |
| 6 | Bore for customer-side sealing, without breaking the lead seal, the valve cannot be adjusted. |
Valve mounting screws
For reasons of stability, exclusively the following valve mounting screws are to be used:
4 hexagon socket head cap screws
ISO 4762-M5x…-10.9-flZn-240h-L
(friction coefficient 0.09 ... 0.14 according to VDA 235-101)
(must be ordered separately, also see RE 27506-XC-B3, section 9.1, Available accessories)
Ordering codes
Downloads
 | Explosion-protected hydraulic products for industrial and mobile applications Brochure | R999000373 | 2017-03-01 | English | PDF | 5.8MB Product Groups: Pumps, CD - single rod cylinder, Proportional, high-response and servo valves, Axial piston pumps, Mobile controls Product overview |
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