Pressure Reducing Valve 01 Series Reducing Modular Valves MRP-01 MRA-01 MRB-01
Features
The modular valves are functional elements with which a hydraulic system can be composed and built easily by stacking them with the mounting bolts. Therefore, no piping is required for the manufacture of the hydraulic systems.
Seric's 01 Series Modular Valves are widely used to compose the hydraulic systems for the various industrial equipment including machine tools, special purpose machines and injection moulding machines.
The valves have standardized mounting surface conforming to ISO 4401-AB-03-4-A and optimum thickness for the stacking.
Specifications
| Model Numbers |
Max. Operating Pressure
MPa (PSI) |
Max. Flow
L /min (U.S.GPM) |
| MRP-01-∗-30 |
31.5 (4570) |
35 (9.25)★1 |
| MRA-01-∗-30 |
| MRB-01-∗-30 |
★If the pressure is set below 1.9 MPa (280 PSI), the maximum flow is limited. See the minimum adjustment pressure vs. maximum flow characteristics and during use, stay within the shaded zone on the graph.
Model Number Designation
| F- |
MRP |
-1 |
-C |
-30 |
| Special Seals |
Series Number |
Valve Size |
Pres. Adj . Range
Mpa (PSI) |
Design Number |
| F: Special Seals for Phosphate Ester Type Fluids (Omit if not required) |
MRP: Relief Valve for P-Line
MRA: Relief Valve for A-Line
MRB: Relief Valve for B-Line |
1 |
B: ∗-7 (∗-1020)★1
C: 3.5-14 (510-2030)
H: 7-21 (1020-3050) |
30 |
★See the "Minimum Adjustment Pressure vs. Maximum Flow" of the next page for the item marked ∗.
Instructions
The minimum adjustment pressure equals the value obtained from the minimum adjustment pressure characteristics plus the tank line back pressure of the next page. This back pressure should include the value of the T-line pressure drop characteristics of the valves stacked to the base plate side of the modular valves.
To make pressure adjustment, loosen the lock nut and turn the pressure adjustment screw clockwise or anticlockwise. For an increase of pressure, turn the screw clockwise. Be sure to re-tighten the lock nut firmly after making adjustment to the pressure.
Hydraulic Fluid: Viscosity 35 mm²/ s (164 SSU), Specific Gravity 0.850
Pres. Drop at Spool Fully Open (P-Line)
Min. Adjustment Pressure vs. Max. Flow
MRP-01-*-30, MRA-01-*-30, MRB-01-* -30
Approx. Mass............ 1.1 kg (2.4 lbs.)
| Model No. |
L1 |
L2 |
| MR∗-01-B |
158 (6.22) |
92 (3.62) |
| MR∗-01-C |
| MR∗-01-H |
173.5 (6.83) |
107.5 (4.23) |
| Model Numbers |
Piping Size "C" Thd. |
| MR∗-01-∗-30 |
Rc 1/4 |
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