SL6PA1-6X/V
Manufacturer: Bosch Rexroth
Material #: R901232641
Model : SL6PA1-6X/V
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth SL6PA1-6X/V (R901232641) is an advanced isolator valve designed for subplate mounting, primarily used to achieve leak-free blocking of one actuator port, even during extended periods of inactivity. This releasable check valve features a robust construction that includes a housing, seat poppet, compression spring, and control spool. It also optionally comes with a preopening as a ball seat valve.
The valve operates such that it allows free flow from direction A to B without external pilot pressure, provided the condition pA > pB (cracking pressure of the compression spring) is met. For flow in the opposite direction, the valve closes hydraulically tight. The application of sufficient pilot pressure at port X actuates the control spool, disengaging the seat poppet and enabling free bi-directional flow.
This model offers two versions: Version A with preopening and Version B without it. Version A has a two-stage setup with an increased control open ratio which ensures secure unloading even under low pilot pressures while minimizing switching shocks by dampening decompression. On the other hand, Version B may release the contained pressure volume suddenly which could cause switching shocks potentially leading to premature wear or noise in installed components.
The SL6PA1-6X/V can be modified to type SL by swapping out plugs, ensuring one plug is always installed for proper function. It adheres to ISO standards for subplate mounting and offers customizable options such as various cracking pressures and corrosion-resistant designs. Individual installation sets for the check valve are also available for purchase separately. This versatility makes it suitable for diverse hydraulic applications requiring reliable performance and precise control over fluid dynamics in hydraulic systems.
$733.03 USD
Availability: Backordered
Ships from US Note: Sales tax, shipping, and applicable tariffs will be calculated at checkout.
Qty:
Delivered as early as April 28, 2027
This product is eligible for factory repair.
The isolator valve type SV is a releasable check valve for subplate mounting. It is used for the leakage-free blocking of one actuator port, also in case of longer standstill times.
The valve basically consists of a housing (1), a seat poppet (2), a compression spring (3), a control spool (4) as well as of a pre-opening as ball seat valve (7), which is optional.
The seat valve can be flown through from direction A to B without external pilot pressure.
Condition: pA > pB + cracking pressure (compression spring). In the opposite direction, the seat valve closes hydraulically tight.
A sufficiently high pilot pressure at port X moves the control spool (4) in the direction of the seat valve and pushes the seat poppet (2) out of its seat. This allows for a free flow in both directions (active keeping open).
In order to ensure that the seat valve actively opens, the pressure ratios on both sides of the control spool (4) are just as important as the area ratios at the seat poppet (2) or (7).
This results in the following available options for the types
SV (large spool face A2 (6) connected to pA ) oras well as for the versions with pre-opening "A" and without pre-opening "B".
Version "A" (with pre-opening)
This valve is provided with an additional pre-opening. By pressurization at port X, the control spool (4) is moved to the right. As a result, the ball (7) is pushed off the seat first and the seat poppet (2) afterwards.
Notes!
Version "A":
The two-stage set-up with an increased control open ratio means even low pilot pressure can be unloaded securely. Avoidance of switching shocks due to dampened decompression of the pressure volume on the actuator side.Version "B":
In case of valves without pre-opening, the included pressure volume may be unloaded suddenly. Resulting switching shocks may lead to premature wear on installed components, as well as noise formation.
The modification of type SV to type SL is possible by exchange of plugs (9) and (10). One of the both plugs must always be installed!
Type SL 6 PB.‑6X/…
|
Type |
Plug (9) |
Plug (10) |
|
SL |
M3 (closed) |
M6 x 1 (open) |
|
pA* |
Type-dependent (for type SL: pA* = 0) |
|
pSt |
Pilot pressure |
|
pA |
Working pressure in A |
|
pB |
Working pressure in B |
|
pF |
Cracking pressure (spring) |
|
A1 – A4 |
For areas, see sectional drawing and control area ratios |
Δp-qV characteristic curves
Calculation of the pilot pressure pSt dependent on pA and pB
(measured with HLP46, ϑOil = 40 ±5 °C)
Version "A" (with pre-opening)
Balance of forces:
Assumption: pA = 0
Version "B" (without pre-opening)
Balance of forces:
Assumption: pA = 0
Pilot oil return, external
Dimensions in mm
|
L in mm |
||
|
Version |
without pre-opening "B" |
with pre-opening "A" |
|
„1“ , „2“ , „3“ |
11 |
21,5 |
|
„4“ |
14 |
– |
|
1 |
Port Y (M6 x 1; closed for type SV) |
|
2 |
Name plate |
|
3 |
Identical seal rings for ports A, B, P(X), (T)Y |
|
4 |
Plug screw SW24 (pilot spool), tightening torque MA = 80+5 Nm |
|
5 |
Plug screw SW22 (check valve uses), tightening torque MA = 25+5 Nm |
|
6 |
Through hole for valve mounting screws |
|
7 |
Porting pattern according to ISO 4401-03-02-0-05 and ISO 5781-03-04-0-00(with locating hole and locking pin ISO 8752-3x8-St) |
|
8 |
Locking pin ISO 8752-3x8-St |
Valve mounting screws (separate order)
4 hexagon socket head cap screws ISO 4762 - M5 x 50 - 10.9
(with friction coefficient μtotal = 0.14);
tightening torque MA = [si]8.9 Nm[/si][/imp]6.6 lb-ft[/imp] ± 10%
(please adjust in case of modified surfaces; use manual torque wrench!)
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