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Single-acting Overcentre Valves
Load holding and controlled lowering
Description
SINGLE-ACTING OVERCENTRE VALVES
Applications
- These valves are used to control and block the cylinders movements to enable the following functions.
- Controlled lowering of the load: prevents the load from becoming the driving element,
and the overcentre valve prevents the cylinder from cavitating.
- Limit the pressure within the cylinder in the event of shocks created by an overload or pressure peaks created by the pump
(requires the utilisation of open centre spool valve).
Specifications
- Zinc-plated bi-chromate steel body.
- Factory setting: 320 bar.
- Adjust the valve to at least 1.3 times the load pressure to enable a quick closure.
| Max. flow at input (l/min) | Max. pressure (bar) | Pilot ratio | Dimensions | Weight (kg) | Reference | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| V1, V2, C1, C2 |
L mm |
L1 mm |
L2 mm |
L3 mm |
L4 mm |
L5 mm |
L6 mm |
H mm |
S mm |
|||||
| 20 | 350 | 1:4.5 | 1/4"BSP | 100 | 149 | 30 | 60 | 20 | 50 | 55 | 60 | 30 | 1.310 | BVS014TDNX1 |
| 40 | 350 | 1:4.5 | 3/8"BSP | 100 | 149 | 30 | 60 | 20 | 50 | 55 | 60 | 30 | 1.256 | BVS038TDNX1 |
| 60 | 350 | 1:4.5 | 1/2"BSP | 100 | 149 | 36 | 65 | 20 | 50 | 57.5 | 60 | 30 | 1.196 | BVS012TDNX1 |
| 95 | 350 | 1:5.5 | 3/4"BSP | 127 | 192 | 46 | 85 | 23.5 | 62.5 | 75 | 80 | 35 | 2.372 | BVS034TDNX1 |
Connections
C1; C2 : Cylinder
V1; V2 : Spool valve
ATTENTION!
The valve alone does not hold the load in one position if the actuator has internal leakage (especially for hydraulic motor).
For applications that require safe long-term positioning, a mechanical brake must also be applied in addition to the valve!
Product Details
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Single-acting Overcentre Valves