PRESSURE REDUCING (AND CHECK) VALVES RT/RG RCT/RCG -03/06/10 (3/8, 3/4, 1-1/4) Threaded Connections / Sub-plate Mounting PRESSURE CONTROLS Pressure Reducing Valves Pressure Reducing and Check Valves Pressure reducing valves are used to set the pressure of a hydraulic circuit below that of the main circuit. In addition, operation under remote control is possible by using the remote control port. Pressure reducing and check valves are used to set the pressure of a hydraulic circuit below that of the main circuit. They have check valves, which allow a free flow from the secondary side to the primary. Operation under remote control is also possible by using the remote control port. Hydraulic Fluids Fluid Types Any type of hydraulic fluid listed in the table below can be used. Petroleum base oils Synthetic fluids Water containing fluids Use fluids equivalent to ISO VG 32 or VG 46. Use phosphate ester or polyol ester fluid. When phosphate ester fluid is used, prefix "F-" to the model number because the special seals (fluororubber) are required to be used. Use water-glycol fluid. Note: For use with hydraulic fluids other than those listed above, please consult your Yuken representatives in advance. Recommended Viscosity and Oil Temperatures Viscosity ranging between 15 - 400 mm2/s (77 - 1800 SSU). Oil temperatures between -15/+70°C (5 - 158°F). Use hydraulic fluids which satisfy the recommended viscosity and oil temperatures given above. Control of Contamination Due caution must be paid to maintaining control over contamination of the hydraulic fluids which may otherwise lead to breakdowns and shorten the life of the valves. Please maintain the degree of contamination within NAS 1638Grade 12. Use 25 μ m or finer line filter.

Pressure Reducing (and Check) Valves RT/RG RCT/RCG -03/06/10 PRESSURE CONTROLS Specifications / Model Number Designation Specifications Model Numbers Valve Name Threaded Connection Setting Pressure Sub-plate Mounting Pressure RT-06-∗-22∗ Reducing Valve Drain Flow Approx. Mass kg (lbs.) Threaded Connection Sub-plate Mounting 1. The max. flow rates are those shown at the primary pressure at 21 MPa (3050 PSI). 2. The drain flow rates are equal to pilot flow rates when differential pressure between primary and secondary pressure is at 20.5 MPa (2970 PSI). Yuken can offer flanged connection valves...

Pressure Reducing (and Check) Valves RT/RG RCT/RCG -03/06/10 PRESSURE CONTROLS Attachment / Sub-plate / Instructions Attachment Mounting bolts Socket Head Cap Screw Valve Model Numbers Japanese Std. "JIS" and European Design Std. Sub-plate Valve Model Numbers Japanese Standard "JIS" Sub-plate Model Numbers Thread Size European Design Standard Sub-plate Model Numbers Thread Size N. American Design Standard Sub-plate Model Numbers Thread Size Sub-plates are available. Specify the sub-plate model number from the table above. When sub-plates are not used, the mounting surface should have a good machined...

Pressure Reducing Valves RT-03/06/10 PRESSURE CONTROLS Model Numbers Remote Control Port "B" Thd. 28 (1.10) Secondary Pressure Gauge Connection "C" Thd. Primary Pressure Gauge Connection "C" Thd. Primary Pressure Inlet Port "A" Thd. 2 Places Secondary Pressure Outlet Port "A" Thd. DIMENSIONS IN MILLIMETRES (INCHES) Thread Size Model Numbers Remote Control Port "S" Thd. Primary Pressure Gauge Connection "T" Thd. Secondary Pressure Gauge Connection "T" Thd. Secondary Pressure Outlet Port "Q" Thd. Model Numbers Primary Pressure Inlet Port "Q" Thd. 2 Places

Pressure Reducing Valves RG-03/06/10 PRESSURE CONTROLS Thread Size Model Numbers Port connection is not required for RG models but an O-ring should be furnished. B Remote Control Port "L" Thd. 11(.43) Dia. Through 17.5(.69) Dia. Spotface 4 Places Mounting Surface (O-Rings Furnished) Primary Pressure Inlet Port Locating Pin 6(.24) Dia. Secondary Pressure Outlet Port Drain Port Model Numbers Secondary Pressure Gauge Connection "N" Thd. DIMENSIONS IN MILLIMETRES (INCHES) Port connection is not required for RG models but an O-ring should be furnished. Primary Pressure Inlet Port 11(.43) Dia. Through...

Pressure Reducing and Check Valves RCT-03/06/10 PRESSURE CONTROLS Thread Size Model Numbers Remote Control Port "B" Thd. 4.5 (.18) Secondary Pressure Gauge Connection "C" Thd. Primary Pressure Gauge Connection "C" Thd. Primary Pressure Inlet Port or Reversed Free Flow Outlet Port "A" Thd. 2 Places Secondary Pressure Outlet Port or Reversed Free Flow Inlet Port "A" Thd. DIMENSIONS IN MILLIMETRES (INCHES) Thread Size Model Numbers Fully Extended "D" Primary Pressure Gauge Connection "T" Thd. Remote Control Port "S" Thd. Secondary Pressure Gauge Connection "T" Thd. Secondary Pressure Outlet Port...

Pressure Reducing and Check Valves RCG-03/06/10 PRESSURE CONTROLS Model Numbers Port connection is not required for RCG models but an O-ring should be furnished. Remote Control Port "N" Thd. 11(.43) Dia. Through 17.5(.69) Dia. Spotface 4 Places Mounting Surface (O-Rings Furnished) Primary Pressure Inlet Port or Reversed Free Flow Outlet Port Secondary Pressure Outlet Port or Reversed Free Flow Inlet Port Drain Port Model Numbers Secondary Pressure Gauge Connection "P" Thd. DIMENSIONS IN MILLIMETRES (INCHES) Remote Control Port "A" Thd. Model Numbers Port connection is not required for RCG models...

Sub-plate for Pressure Reducing (and Check) Valves Installation Drawings HGM-03-20/2080/2090 HGM-03X-20/2080/2090 DIMENSIONS IN MILLIMETRES (INCHES) Sub-plate Model Numbers 4(.16) Dia. Through "A" Thd. (From Rear) "C" Thd. 20(.79) Deep 4 Places This port is processed because of sharing this sub-plate with the H/HC Type Pressure Control Valve and not used for the Pressure Reducing (and Check) Valve. 8.8(.35) Dia. Through 14(.55) Dia. Spotface 4 Places PRESSURE CONTROLS