These valves consist of a small size but high performance EH series electro-hydraulic proportional pilot relief valve and reducing valve with relief function. The valves control the system pressure proportionally through a controlled input voltage. Moreover, a good response speed in reducing the pressure even at a large load capacity can be obtained with the relief function of the valves. EIC-H-116- Specification Model Number EHRBG-6 Description Max. Operating Pres. 25 *1 *2 EHRBG-1 Max. Flow L/min. 1 25 *1 *1 Max. Relieving Flow L/min. 15 Pres. Adj. Range Refer to Model No. Designation Coil Resistance Ω 1 Hysteresis 3% or Less Repeatability *2 1% or Less Frequency Response Refer to Frequency Response on page 661 Supply Electric Power 24V DC (21 to 28V DC included Ripple) Power Input (Max.) W 28 B: 7 / 5V DC Input Signal C: 14 / 5V DC H: 21 / 5V DC (at Flow rate Zero) Input Impedance kω 1 B: 5V DC / 7 Signal Output C: 5V DC / 14 H: 5V DC / 21 Ambient 5 C (With Circulated Air) The figures shown are those obtained where the differential pressure Between the secondary pressure port and tank port is 14. The repeatability of the valve is obtained by having it tested independently On the conditions similar to its original testing. Graphic Symbols Open-Loop Type Open-Loop Type With Sensor Model Number Designation F- EHRB -G -6 -C -S -5 Special Seals F: Special Seals for Phosphate Ester Type Fluid (Omit if not required Series Number EHRB: Proportional Electro-Hydraulic Relieving & Reducing Valve Type of Mounting G: Sub-Plate Mounting Valve Size 6 1 Adj. Range B: 8 ~ 7 C: 12 ~ 14 H: 15 ~ 21 B: 9 ~ 7 C: 12 ~ 14 H: 15 ~ 21 Control Type None: Open-Loop S : Open-Loop with sensor Design Number 5 6
Mounting Bolts Model Number Socket head cap Screw Qty EHRBG-6 4 M1 x 7Lg. EHRBG-1 6 Bolt Kit Model Number BKEHRBG-6-5 Sub-Plate Sl. No. Model Number Sub-Plate Model Numbers Thread size Mass Kg. 1 EHRBG-6 ERBGM-6-28 3/4 BSP.F 3. 2 EHRBG-1 ERBGM-1-18 1 1/4 BSP.F 6.5 Sub-plates are available. Specify sub-plate model number from the table above. When sub-plates are not used, the mounting surface should have a good machined finish. Instructions at the Primary Port The necessary pressure at the primary pressure port should be equal to the set pressure plus 1 Drain Port The back pressure at the drain port should be less than 2. The pipe from the drain port should be connected to the reservoir directly and the end of the pipe must always be in the oil. EHRBG-6- -5 : EHRBG-6- -S-5 : (Open-Loop Type) (Open-Loop Type with Sensor) 2 12.3 Load capacity The use of the valves at the load capacity of about 2 L is recommended. Even at the lowest, a load capacity of more than 1.4 L is required. 215 76.7 6.3 DIMENSIONS IN MILLIMETRES Power Indicator Lamp Tank Port "T" Approx. Mass. Open Loop Type...12.3 Kg. Open Loop Type Sensor...13 Kg. 48 14 Electrical Conduit Connection 1/2 BSP.F Thd. 79.4 39.7 Amplifier (Refer to Page on 641) Primary Port Air Vent 3 Hex. Soc. Drain Port Secondary Port 11 Dia. x Thru. 17.5 Dia. Spot Face Close-Loop Type Opened-Loop Type with Sensor H Proportional Electro-Hydraulic Relieving and Reducing Valves 115 187 25 Inc. Manual Pr. Adj. Screw 3 Hex. Soc Adaptor Octagonal Width 22 57 Mounting Surface (O-Ring Furnished) Locking Pin 6 Dia. 69.7 28 7
EHRBG-1- -5 : EHRBG-1- -S-5 : (Open-Loop Type) (Open-Loop Type with Sensor) 2 11.1 236 84.1 42.1 EH SERIES Power Indicator Lamp Tank Port "T" 119 96.8 48.4 48 Electrical Conduit Connection 1/2 BSP.F Thd. Amplifier (Refer to Page on 641) Primary Port Drain Port Secondary Port 11 Dia. x Thru. 17.5 Dia. Spot Face 6 Places Opened-Loop Type with Sensor Air Vent 3 Hex. Soc. 117 189 27 Inc. Manual Pr. Adj. Screw 3 Hex. Soc Adaptor Octagonal Width 22 56 Mounting Surface (O-Ring Furnished) 6 Locking Pin 6 Dia. 62 233 Approx. Mass. Open Loop Type...13.8 Kg. Open Loop Type Sensor...14.5 Kg. Sub-Plate DIMENSIONS IN MILLIMETRES ERBGM-6 ERBGM-1 M1 Thd. x 2 Deep 8.8 Dia. x Thru 14 Dia. Spotface 12 79.4 11.3 73 39.7 3.7 13 77.3 6.3 49.2 44.5 2.6 11.1 25 1 Dia. PF 3 8 Thd. PF 3 8 Thd. M1 Thd. x 2 Deep 6 Places 11 Dia. x Thru 17.5 Dia. Spotface 12 96.8 92.9 11.6 48.4 25 11.5 84.1 67.5 62.7 42.1 24.6 16.7 9.6 PF 3 8 Thd. 14 Dia. 27 2-PF ¾ Thd. 18 Dia 2 Places 2.7 27.9 16 14 136 5 Dia. 7 Dia. 1 Deep 15 16 45 12 116 14 12 PF 1 4 Thd. 21 3 5 Dia. 96 126 15 28 Dia. 2 Places PF 1 1 4 Thd. 2 Places 19 2 55 8
Input Signal Voltage Vs. Secondary Primary : 25 Viscosity : 3 cst EHRBG-6 EHRBG-1 21 21 1 EHRBG-6-H 1 EHRBG-1-H Seconday 14 15 7 EHRBG-6-C EHRBG-6-B Seconday 14 15 7 EHRBG-1-C EHRBG-1-B 1 2 3 4 5 Input Signal Voltage V DC 1 2 3 4 5 Input Signal Voltage V DC Flow Vs. Secondary EHRBG-6-B EHRBG-1-B Secondary 7 6 5 45 4 3 25 1 5 2 4 6 8 1 L/min. Secondary 6 7 5 4 3 2 2 1 25 5 1 125 15 1 2 225 25 L/min. H Secondary 14 1 13 1 95 9 7 6 4 3 EHRBG-6-C 2 4 6 8 1 L/min. Secondary 11 1 9 6 5 4 EHRBG-1-C 25 5 1 125 15 1 2 225 25 L/min. Proportional Electro-Hydraulic Relieving and Reducing Valves 9
Secondary 21 2 19 14 13 12 1 9 8 7 6 EHRBG-6-H 2 4 6 8 1 L/min. Secondary 22 2 18 17 15 13 12 1 8 5 7 3 EHRBG-1-H 25 5 1 125 15 1 2 225 25 L/min. Viscosity Vs. Secondary EHRBG-6-B Oil : ISO VG 32 Oil. EHRBG-1-B Sec. 7 4 3 Sec. 7 4 3 2 3 4 5 6 C Viscosity 85 5 3 2 15 cst EHRBG-6-C Sec. 14 1 13 7 Viscosity 37 1 2 3 4 5 6 C 3 15 85 56 26 cst EHRBG-6-H Viscosity Sec. 14 1 13 7 Viscosity 2 3 4 5 6 7 C 15 85 56 37 26 17 cst EHRBG-1-C 2 3 4 5 6 7 C 15 85 56 37 26 17 cst EHRBG-1-H Sec. 21 2 19 11 1 9 Viscosity 37 66 1 2 3 4 5 6 C 3 15 85 56 26 cst Sec. 21 2 19 11 1 9 Viscosity 2 3 4 5 6 7 C 15 85 56 37 26 17 cst
(db) (db) (db) Step Response (Example) The following step response measurements are taken when the trapped oil volume is 2 L. The step response varies by trapped oil volume. 9 8 6 4 2 1 8 6 4 2 EHRBG-6-B EHRBG-1-B 22 2 16 12 8 4 2 16 12 8 4 EHRBG-6-C EHRBG-1-C Primary : 25 Trapped Oil Volume : 2 L Viscosity : 3 cst EHRBG-6-H EHRBG-1-H 24 2 16 12 8 4 2 2 2 16 12 8 4 E SERIES Frequency Response -2-4 -6-8 -1-12 -14-16 -18 1-1 -2 (db) EHRBG-6-B.1.2.4.7 1 2 4 7 1 Secondary : 54±15-2 -4-6 -8-1 -12-14 -16-18 EHRBG-1-B 1-1 -2 Primary : 25 Trapped Oil Volume : 2 L Viscosity : 3 cst.1.2.4.7 1 2 4 7 1 Secondary : 54±15-2 -4-6 -8-1 -12-14 -16-18 -2-4 -6-8 -1-12 -14-16 -18 1-1 -2 1-1 -2 EHRBG-6-C.1.2.4.7 1 2 4 7 1 Secondary : 11±3 EHRBG-6-H -2-4 -6-8 -1-12 -14-16 -18 1-1 -2 (db) Seconday : 11±3 1.1.2.4.7 1 2 4 7 1.1.2.4.7 1 2 4 7 1-2 -1-4 -2-6 -8-1 -12 Secondary : 17±4-14 -16 Secondary : 16±44-18 EHRBG-6-C EHRBG-6-H (db).1.2.4.7 1 2 4 7 1 661 H Proportional Electro-Hydraulic Relieving and Reducing Valves