PRESSURE REDUCING AND RELIEVING VALVES

Transcription

1 REDUING AND RELIEVING VALVES RBG-3 / 6 (3/8, 3/4) Mounting Specifications / Model Number Designation / Others Up to 25 (363 ), 25 (33 U.S.GPM) reducing and relieving valves are composite pressure control valves having pressure reducing and counterbalancing functions developed for hydraulic balancing circuits. Pub. E-24 Specifications RBG-3- - RBG-6- - Max. Operating () 4 (23) 25 (363) Pres. Adj. Range () (9-96) (2-355) Max. Flow (U.S.GPM) 5 (3.2) 25 (33) Relieving Flow (U.S.GPM) 5 (3.2) 25 (33) Drain Flow (U.S.GPM).6- (.6-.26).5-2 (.4-.53) Approx. Mass kg (lbs.) 4.2 (9.3) (24.3) Model Number Designation F- RB G -3 -R - Special Seals Series Number Type of Mounting Valve Size Drain Type Design Number Design Standards F: Special Seals for Phosphate Ester Type Fluids (Omit if not required) RB: Reducing and Relieving Valves G: Mounting 3 6 None: Internal Drain R: External Drain Refer to Design Standards: None... Japanese Standard "JIS" 8... European Design Standard 9... N. American Design Standard Graphic Symbols Attachment Mounting Bolts Valve RBG-3 RBG-6 Valve Model Numbers RBG-3 RBG-6 Piping Size 3/8 /2 3/4 Japanese Standard "JIS" European Design Standard M 65 Lg. M 7 Lg. Socket Head ap Screw (4 pcs.) Thread Size N. American Design Standard 3/8-6 UN 2-/2 Lg. 3/8-6 UN 2-3/4 Lg. Japanese Standard "JIS" European Design Standard N. American Design Standard RBGM-3- RBGM-3X- RBGM-6- RBGM-6X- Rc 3/8 Rc /2 Rc 3/4 Rc RBGM-3-8 RBGM-3X-8 RBGM-6-8 RBGM-6X-8 Thread Size 3/8 BSP.F /2 BSP.F 3/4 BSP.F BSP.F RBGM-3-9 RBGM-3X-9 RBGM-6-9 RBGM-6X-9 Internal drain External drain Thread Size 3/8 NPT /2 NPT 3/4 NPT NPT Approx. Mass kg (lbs.) s 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 finish..6 (3.5) 4.8 (.6) No.

2 RBG-3 / 6 Hydraulic Fluids / Instructions / Features and Applications Hydraulic Fluids Fluid Types Any type of hydraulic fluids listed in the table below can be used. Petroleum base oils Synthetic fluids Water containing fluids Use fluids equivalent to ISO VG32 or VG46. 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 2 Viscosity ranging between 5-4 mm /s (77-8 SSU). Oil temperatures between -5/+7 (5-58 F). Use hydraulic fluids which satisfy the recommended viscosity and oil temperatures given above. ontrol of ontamination 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 with-in NAS 638-Grade 2. Use 25 μm or finer line filter. Instructions To use remote control relief valve in the venting circuit, see the atalogue No. Pub. E-2. If the internal volume of the vent line is too large, chattering is likely to occur. Thus, as far as possible reduce the inside Dia and the length of the pipe. To adjust the pressure, loosen the lock nut and turn the pressure adjustment handle slowly clockwise for higher pressures and anti-clockwise for lower pressures. After adjustments, do not forget to tighten the lock nut. is limited by collars fitted. If a working pressure cannot be attained, remove some collars. One collar is equivalent to (45 ). onnect the tank pipe not to any other line but directly to the tank. Features and applications of pressure reducing and relieving valves A conventional circuit composed of a pressure reducing valve, a relief valve (for counterbalance) and a check valve can be replaced with one pressure reducing and relieving valve. This enables balancing pressures to be adjusted easily and permits the circuit to be greatly simplified, resulting in a lower cost. If the load is changed, the balancing pressure can be reset easily only by operating the pressure adjustment handle. reducing and relieving valves can be applied to hydraulic balance circuits such as balance mechanisms of machining centers. <Example> W M O No.2

3 RBG-3 Installation Drawings RBG-3- -/8/9 89 (3.5) (2.63) (.44) 62 (2.44) (.39) 42.9 (.69) Tank Port (.43) Dia. Through 7.5(.69) Dia. Spotface Two ollars RBG-3- RBG-3-8 Rc /4 /4 BSP.F Drain Port (Only External Drain Type) Primary Port 5 (.59) 73 (2.87) Lock Nut 4(.55) Hex. Secondary pressure port RBG-3-9 /4 NPT Vent Port Fully Extended 56 (6.4) Adj. Handle IN. 52 (2.5) 5 (.97) 95 (3.74) 3 (.8) 75 (2.95) 97.5 (3.84) 45(.77) Dia. Mounting Surface (s Furnished) DIMENSIONS IN MILLIMETRES (INHES) 3 : RBGM- -/8/9 3X (.39).7 (.7) 2(4.2) 82(3.23) 6(2.4) 2 (.83) (.39) 66.7(2.63) 58.7(2.3) 33.3(.3) 7.9 (.3) 8 (.3) 7(2.76) 9(3.54) 4(.55) Dia. "" Thd. 2(.79) Deep 5(.59) 7.(.28) 2.4(.84) 35.7(.4) (.69) (.77) 73(2.87) 8.8(.35) Dia. Through 4(.55) Dia. Spotface 6.2(.24) Dia. "B" Thd. RBGM-3- RBGM-3-8 "B" Thd. "" Thd. Rc 3/8 Rc /4 M 3/8 BSP.F /4 BSP.F 5(.59) 6(.63) 32(.26) RBGM-3-9 RBGM-3X- RBGM-3X-8 RBGM-3X-9 3/8 NPT Rc /2 /2 BSP.F /2 NPT /4 NPT Rc /4 /4 BSP.F /4 NPT 3/8-6 UN M 3/8-6 UN No.3

4 RBG-6 Installation Drawings RBG-6- -/8/9 RBG-6- Rc 3/8 RBG-6-8 3/8 BSP.F Primary Port 5 (4.53) Fully Extended 74.4(2.93) 27.5 (8.56) 6.3 (2.37) Tank Port (.43) Dia. Through 7.5(.69) Dia. Spotface 2.3 (.48) RBG-6-9 3/8 NPT Adj. Handle IN. Two ollars Lock Nut 4(.55) Hex. Vent Port 56 (2.2) 57 (2.24) 6 (4.57) 39 (5.47) 45(.77) Dia (3.3) 4 (4.9) Secondary pressure port Drain Port 6 : RBGM- -/8/9 6X "J" Thd. 8(.7) Deep B 2 (.47) A 33 (.3) 5 (5.9) 26 (4.96) 6.3 (2.37) 49.2 (.94) 3. (.9). (.44) 8.6(.34) 23(.9) Dia. (.43) Dia. Through 7.5(.69) Dia. Spotface 39.7 (.56) 22 (.87) 2 (.47) 73 (2.87) 79.4 (3.3) 6 (4.57) 4 (5.5) Mounting Surface (s Furnished) Model Numbers RBGM-6 RBGM-6X A 2.7 (.8) 2.4 (.8) DIMENSIONS IN MILLIMETRES (INHES) Dimensions mm (Inches) B D E 65.7 (2.59) 69.7 (2.74) 95 (3.74) 98.4 (3.87) 37. (.46) 32.5 (.28) 89. (3.5) 93.8 (3.69) "F" Thd. D E 6.2(.24) Dia. "H" Thd. RBGM-6- RBGM-6-8 "F" Thd. Rc 3/4 3/4 BSP.F Thread Size "H" Thd. Rc /4 /4 BSP.F "J" Thd. M 9(.75) 2(.79) 45 (.77) RBGM-6-9 RBGM-6X- RBGM-6X-8 RBGM-6X-9 3/4 NPT Rc BSP.F NPT /4 NPT Rc /4 /4 BSP.F /4 NPT 3/8-6 UN M 3/8-6 UN No.4

5 RBG-3 / 6 Performance haracteristics Hydraulic Fluid: Viscosity 35 mm /s (64 SSU), Specific Gravity.85 Nominal Override haracteristics Secondary 2 RBG-3 Relieving Reducing U.S. GPM Secondary RBG U.S. GPM Min. Adj. & Vent RBG-3 Min. Adj. Vent RBG U.S. GPM 2 3 U.S. GPM Drop 6.4 RBG RBG-6 Drop P Drop P mm /s Viscosity SSU Factor U.S. GPM For any other viscosity, multiply the factors in the table below U.S. GPM For any others pecific gravity (G'), the pressure drop ( P') may be obtained from the formula below. P'= P (G'/.85) No.5

6 RBG-3 / 6 Spare Parts List RBG-3- -/8/ List of Seals Item Name of Parts Part Numbers Qty. Remarks SO-NB-P24 SO-NB-P8 SO-NB-P9 SO-NA-P9 3 Included in Seal Kit Kit No. : KS-RBG RBG-6- -/8/ Design 8 Only List of Seals Item Name of Parts Part Numbers Qty. Remarks Bonded Seal SO-NB-P9 SO-NB-P24 SO-NB-P28 SO-NB-P3 SO-NA-P9 SG-FB-3/8 4 3 Included in Seal Kit Kit No. : KS-RBG-6- Note: No bonded seals are included in the seal kits. No.6