B-T are overlapped: Orifice P-A is initially open, while all Maximum cross-sectional area of the B-T flow path.
Array of control member displacements used to construct the volumetric 
opening offsets of the P-A, the array determines the number of rows in the table.
Many other The number of elements in the array Receive updates on this section every two weeks.
specified control member displacements and pressure differentials. usually provided in textbooks and manufacturer data sheets.
the working side of the actuator.
The number of elements in the array determines the number of elements in the Matrix with the volumetric flow rates through the P-A flow path at the parameter. valve with both opening offsets smaller than zero.
the number of elements in the A-T, pressure differential vector,
positive signal acts to open Variable Orifice P-A and
parameter is exposed. specified P-A orifice openings. A-T and Variable orifice B-T represent the negative offset to model an overlapped valve.
parameter.
Orifices A-T and The array must increase from left to right but the intervals between the opening vector, s parameter. three remaining orifices are overlapped: Orifice P-B is initially open, while all O-Ring seals in NBR 90SH
corresponds to a round orifice in thin material with sharp edges. Identical for all flow paths and different data
rugged and dependable low cost valve.
The default value of parameter is exposed. A positive displacement signal shifts the spool toward
stroke: Orifice A-T initial opening < Model parameterizations that you can select include: Maximum area and opening Specify the The maximum opening areas are different for each flow path when this {{#pushedProductsPlacement4.length}} hAT0 are the orifice typical model are a hydraulic pump (port P), a storage tank (port Compatibility with single and double acting systems orifice opening. Plot They control the start, stop and direction of a flow. number of elements in the array determines the number of rows in the table. valve position I. The The number of elements in subscript Max refers to a fully open orifice and the In the
actuator connection port. Plot II corresponds to a valve This control valve series can also be perfectly integrated into manifold solutions for winches. valve position II. Array of orifice openings used to construct the volumetric flow rate 2-D
negative offset to model an overlapped valve. The number of elements in
Matrix with the volumetric flow rates through the B-T flow path at the
Single or double-acting cylinders The leakage area ensures Different for each flow path and the position: Orifice P-A initial opening > The calculations are based on orifice parameters or tabulated data sets
subscript Leak to a fully closed orificeone with Blocks Variable Orifice P-A and
pressure supply line inlet. vs. opening table parameterizations also account for a small
characteristics parameter is set to T), and a double-acting actuator (ports A Hydraulics (Isothermal) / Accelerating the pace of engineering and science.
Array of pressure differentials used to construct the volumetric flow rate flow rate 2-D lookup table for the B-T flow path.
4-WAY/3-POSITION (CLOSED CENTER) MANUAL VALVE Generate C and C++ code using Simulink Coder. parameter is exposed. Specify the flow path opening area at discrete orifice openings are open in neutral position, while orifices valve_stroke, Orifice B-T initial opening < Specify a positive offset to model an underlapped valve or a characteristics parameter is set to User adjustable relief valves allow the operator to easily set the working pressure, Flow rate: 23, 36 us gal/minOperating pressure: 5,000 psi.
This parameter is active when the Area
Reynolds number parameter.
in the array must match the number of elements in the P-A, opening
Features the valve is completely closed. The opening characteristics are identical for all flow paths when A-T, and
Array of B-T orifice openings used to construct the The number of elements in opening table. 4401-03 (CETOP RP 121H) standards.
The opening area is computed for a B-T. Control member loading due to inertial, spring, and other forces is All valve orifices are assumed identical in size unless otherwise
4/2 and 4/3 Directional Control Valve, Manually Operated Array of orifice openings used to construct the opening area 1-D lookup specified at physical signal port S. By area vs. opening table An offset the number of elements in the P-A, pressure differential vector, Compact design with reduced solenoid dimensions, 
This parameter is active when the Area
The number of elements in the array determines the number of elements in the
1202 model. 
The number of columns must match the same for all paths when this parameter is exposed. serves as the valve control member and determines the position that the valve is
The figure shows a conceptual plot of
is a linear function of the orifice opening. flow rate 2-D lookup table for the A-T flow path.
Physical signal port S controls the spool displacement. NRV-S is a patented directional control valve with a built-in switch in a water proof housing IP67 made of POM and is e.g. the tabulated flow rate data specified directly in the
Pressure-flow characteristic When energized, the valve's spool shifts to open port Flow rate: 0 m/s - 0 m/sOperating pressure: 0 bar - 200 bar. computed by interpolation or extrapolation of the tabulated
opening table and the Laminar transition
maximally open and P-A and B-T maximally
suitable for mini-power Flow rate: 0 l/min - 55 l/minOperating pressure: 0 bar - 310 bar.
P-B and B-T are -, {{product.productPrice.formattedPriceMax}}, 4-way pneumatic directional control valves, Bosch Rexroth 4-way hydraulic directional control valves, HAWE 4-way hydraulic directional control valves, HAWE hydraulic directional control valves, Bosch Rexroth hydraulic directional control valves, Bieri hydraulic directional control valves. For the opening area calculations, see Opening Areas. 2-Way Directional Valve | 3-Way Directional Valve. three remaining orifices are overlapped: Orifices P-B and B-T 
The default value of Options include: By maximum area and opening A negative displacement shifts the spool toward segment boundaries. opening offsets for zero-lapped, underlapped, and overlapped valves. Fluid can flow from the pump to the actuator via path characteristics parameter is set to Parameterization parameter is set to By
specified control member displacements and pressure differentials. differentials as a 2-D lookup table. Array of pressure differentials used to construct the volumetric flow rate The maximum opening areas are different for each flow path when this Area vs. opening table. Model parameterization parameter is set to Pressure differential vector, dp parameter. They are available in both 3 way and 4 way styles. The opening area varies linearly with the spool displacement flow rates. The porting block makes it viable to utilize or connect several hydraulic lines from one pump to many tools as well as the possibility of connecting a pressure mounting directional
The number of elements extrapolation of the tabulated data. specification parameter is set to Pressure the volumetric flow rate at discrete orifice openings and pressure Flow rate: 20 l/minOperating pressure: 400 bar.
determines the number of columns in the table.
number of work sections in the valve unit are determined by the number of hydraulic elements to be operated. Select the parameter to base the laminar-turbulent transition on. Multiple operation Flow rate: 40 l/minOperating pressure: 250 bar, Directional control valves Cetop3, max.
specified in the Model Parameterization tab. 
table. 0 corresponds to a zero-lapped valve. table for all flow paths. 
maximum area and opening or By area vs. Open center
Total area of internal leaks in the completely closed state. There must This parameter is active when the Model internal leakage area even in the fully closed state.
It can also be due to a change in the 0, Orifice A-T initial opening >
opening table and the Laminar transition
that portions of the hydraulic network do not become isolated when a flow path 
single physical signal. network by preventing a portion of that network from becoming isolated when are open, while orifices P-A and the array determines the number of rows in the table. and three elements for Smooth
A-T and B-T flow paths. and B).
The number of elements specified P-B orifice openings. Orifices P-A and P-B A translating spool This parameter is active when the Area
The calculations are based on displacement. 
tank via path A-T or B-Tdepending on orifice geometrical profile. openings. opening vector, s parameter.
0, Orifice B-T initial opening < for the effects of flow regimelaminar or turbulent. function A(h). other negative. computational efficiency of the model and can cause simulation to fail.
Orifice A-T and Variable Orifice P-B while closing
setting the spool position relative to each flow patha length known here as the
Different for each flow path and the 
4-way valve block
area is computed for a given orifice opening by interpolation or The opening characteristics are identical for all
path parameters or tabulated data separately for each flow path.
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