Pilot Operated Check Valves

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Pilot Operated Check Valves These check valves allow flow in one direction and prevent flow in the reverse direction, until operated by pilot pressure to allow free reverse flow. The specified cracking pressure is required to open the valve to allow free flow direction. Graphic Symbols Internal Drain Type External Drain Type Specifications Type of Connection Threaded Connection Mounting CPT/CPDT-3- - - CPT/CPDT-- - - CPT/CPDT-- - - CPG/CPDG-3- - - CPG/CPDG-- - - CPG/CPDG-- - - Rated Flow L/min (U.S.GPM) (.) (33) () (.) (33) () Max. Operating Pres. () (33) (33) Cracking Pres. (). (). (9).3 (). (7). (). (9).3 (). (7) Rated flow is the approximate flow rate, when there is a free flow pressure drop of maximum.3 ( ), the fluid has a specific gravity of.8 and a kinematic viscosity of mm /s (98 SSU), and the cracking pressure is. ( ). pprox. Mass kg (lbs.) 3. (.). (.) 9. (.) 3.3 (7.3). (.9) 8. (8.7) Model Number Designatioin F- CP T 3 -E - - Special Seals Series Number Type of Connection Valve Drain Connection Cracking Pres. () Design Number F: Special Seals for Phosphate Ester Type Fluids (Omit if not required) CP: Pilot Operated Check Valve CPD: Decompression Type Pilot Operated Check Valve T: Threaded Connection G: Mounting 3 3 None: Internal Drain E: External Drain :. () :. (9) 3:.3 () :. (7) Design Standards None: Japanese Std. "JIS" 8: European Design Std. 9: N. merican Design Std. None: Japanese Std. "JIS" & European Design Std. 9: N. merican Design Std. Mounting Bolts Socket head cap screws in the table below are included. Valve Model Numbers CP G-3 CP G- CP G- Socket Head Cap Screw Japanese Standard "JIS" & European Design Standard M Lg. M Lg. M Lg. N.merican Design Standard 3/8- UNC -3/ Lg. 3/8- UNC Lg. 3/8- UNC -/ Lg. Qty. Yuken can offer flanged connection valves described below. For details, contact us. CP F-- - - CP F-- - - Rated Flow L/min (U.S.GPM) () (9) Max. Operating Pressure () (33) (33) Pilot Operated Check Valves

EPilot Operated Check Valves DIRECTIONL CONTROLS Valve Model Numbers CP G-3 CP G- CP G- Japanese Standard "JIS" HGM-3- HGM-3X- HGM-- HGM-X- HGM-- HGM-X- Thread Rc 3/8 Rc/ Rc 3/ Rc Rc -/ Rc -/ European Design Standard HGM-3-8 HGM-3X-8 HGM--8 HGM-X-8 HGM--8 HGM-X-8 Thread 3/8 BSP.F / BSP.F 3/ BSP.F BSP.F -/ BSP.F -/ BSP.F N. merican Design Standard HGM-3-9 HGM-3X-9 HGM--9 HGM-X-9 HGM--9 HGM-X-9 Thread 3/8 NPT / NPT 3/ NPT NPT -/ NPT -/ NPT pprox. Mass kg (lbs.). (3.). (3.). (.3) 3. (.).8 (.).7 (.) 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. s are shared with those for H Type Pressure Control Valves. Refer to pages to for dimensions. Instructions Operation of internal and external drain types When the outlet side P is directly connected to the tank in reversed free flow (Fig. a), the internal drain type is normally used. When the back pressure is applied to the outlet side P (Fig. b), be sure to use the external drain type. Minimum pilot pressure characteristics That depends on the pressure of the inlet side P in the reversed free flow. This value can be determined from the characteristics chart. Cautions on replacementof design low cracking pressure type valves with design valves. In design valve with cracking pressure of.3 ( ) (Code ""), for closing the valve completely and certainly, it was necessar y to introduc e the pressurize d oil into the drain port to push down the piston compulsory. While in design valve with cracking pressure of. ( ) (Code ""), it has such structure that the valve can be closed completely and certainly without introducing the pressurized oil into the drain port. On the contrary, what is worse is that if the pressurized oil is introduced into the drain port, the oil acts towards the direction o f opening the valve, which i s very dangerous and has to be absolutely avoided. Therefore, please do not supply any pressurized oil into the drain port in case of using design valve. P P (Fig.a) DR P P (Fig.b) WRNING The machinery, if misused due to failure to observe the "Cautions" on the left, may perform unforeseeable movements, resulting in a disastrous accident. Pilot Operated Check Valves

CPT/CPDT-3- - -/8/9 CPT/CPDT-- - -/8/9 CPT/CPDT-- - -/8/9 H J FREE D F Free Flow Inlet or Outlet Port "N" Thd. E L K C B Free Flow Outlet or Controlled Flow Inlet Port "N" Thd. Drain Port "P" Thd. Pilot Port "P" Thd. CPT/CPDT-3- - - CPT/CPDT-3- - -8 CPT/CPDT-3- - -9 CPT/CPDT-- - - CPT/CPDT-- - -8 CPT/CPDT-- - -9 CPT/CPDT-- - - CPT/CPDT-- - -8 CPT/CPDT-- - -9 Dimensions mm (Inches) Thread B C D E F H J K L "N" Thd. "P" Thd. 8 (3.) 9 (3.78) (.) (.7) 8 (.89) 7 (.7) 39 (.) 7 (.8) (.). (.93) 7. (.7) 3. (8.) 8. (3.33) 9. (3.) 3 (.) 38 (.) Dia. (.) SQ. 8 (3.) SQ. (.3) 7 (.83) 8 (3.3) 9 (.) 3 (.38) (.7) 7. (.) 7. (.97) 9 (3.78). (.) 3 (.) 3 (.9) Rc 3/8 3/8 BSP.F 3/8 NPT Rc 3/ 3/ BSP.F 3/ NPT Rc -/ -/ BSP.F -/ NPT Rc / / BSP.F / NPT Rc / / BSP.F / NPT Rc / / BSP.F /NPT Pilot Operated Check Valves

EPilot Operated Check Valves DIRECTIONL CONTROLS CPG/CPDG-3- - -/9 CPG/CPDG-- - -/9 Free Flow Outlet or Inlet Port C B H J (.) E D FREE Locating Pin (.) Dia. Drain Port F Pilot Port Mounting Surface (s Furnished) (.3) Dia. Through 7.(.9) Dia. Spotface Places Free Flow Inlet or Controlled Flow Outlet Port B Dimensions mm (Inches) C D E F H J Mounting Surface CPG/CPDG-3- - -/9 9 (3.).7 (.3).7 (.). (.93).9 (.9) (.) (.) 3 (.8) ISO 78-G--- CPG/CPDG-- - -/9 (.) 79. (3.3).3 (.) 7. (.7).3 (.37) 7. (.) 7 (.9) 3 (.38) ISO 78-H-8-- CPG/CPDG-- - -/9 Mounting surface: ISO 78-J--- DIMENSIONS IN MILLIMETRES (INCHES) Free Flow Outlet or Inlet Port Drain Port. (.) 9 (.9) 9.8 (3.8) 89 (3.) (.7) (.) 3. (8.) 8. (3.3). (.) FREE Locating Pin (.) Dia. Mounting Surface (s Furnished) 7 (.7) Pilot Port (.3) Dia. Through 7.(.9) Dia. Spotface Places Free Flow Inlet or Controlled Flow Outlet Port Pilot Operated Check Valves 7

Hydraulic Fluid: Viscosity 3 mm /s ( SSU), Specific Gravity.8 Pressure Drop CPT-3, CPDT-3 CPG-3, CPDG-3 7.. CP T-3- - CP G-3- - CP T-3- -3.8 CP T-3- - CP G-3- -3.8 8 CP G-3- - CP T-3- -.. CP G-3- - 3 L/min 3 L/min U.S.GPM CPT-, CPDT-...8. 7 7 L/min 3 U.S.GPM CPT-, CPDT-.8...9. CP T-- - CP T-- -3 CP T-- - CP T-- -3 CP T-- - CP T-- - CP T-- - CP T-- -.3 3 3 L/min 8 U.S.GPM Min. Pilot Pressure Chart 7 U.S.GPM CPG-, CPDG-...8. 7 7 L/min 3 U.S.GPM CPG-, CPDG- 3. CP G-- - CP G-- -3. CP G-- -. CP G-- -3.8 CP G-- - CP G-- - CP G-- - CP G-- -. 3 3 L/min 8 U.S.GPM Minimum Pilot Pressure (PP) 8 8 P P P PP P PP Cracking Pressure. (7 ). ( ) Cracking Pressure. (7 ). ( ) P P PP : Min. Pilot Pressure to open the Decompression Valve 3 3 Supply Pressure (P) Pressure Drop for Only when Decompression Valve is Opened CPDT-3, CPDG-3 CPDT-, CPDG- CPDT-, CPDG- 3 3 L/min 3 U.S.GPM 3 3 3 L/min 8 U.S.GPM 3 3 L/min 3 U.S.GPM 8 Pilot Operated Check Valves

DIRECTIONL CONTROLS List of Seals CPT/CPDT-3- - -/8/9 CPT/CPDT-- - -/8/9 CPT/CPDT-- - -/8/9 3 7 8 3 9 3 7 3 8 9 List of Seals 9 7 Item Name of Parts Part Numbers CPT/CPDT-3 CPT/CPDT- CPT/CPDT- SO-NB-P7 SO-NB-P SO-NB-P9 SO-NB-P3 3 SO-NB-G SO-NB-P3 SO-NB-P Note: When ordering the seals, please specify the seal kit number from the table below. CPG/CPDG-3- - -/9 CPG/CPDG-- - -/9 CPG/CPDG-- - -/9 List of Seals Item 3 Name of Parts 8 CPG/CPDG-3 SO-NB-P7 SO-NB-P8 SO-NB-P SO-NB-G CPT/CPDT-3- - -/8/9 CPT/CPDT-- - -/8/9 CPT/CPDT-- - -/8/9 CPG/CPDG-3- - -/9 CPG/CPDG-- - -/9 CPG/CPDG-- - -/9 Part Numbers CPG/CPDG- SO-NB-P8 SO-NB-P9 SO-NB-P3 Note: When ordering the s, please specify the seal kit number from the table below. List of Seal Kits 3 Seal Kit Numbers KS-CPT-3- KS-CPT-- KS-CPT-- KS-CPG-3- KS-CPG-- KS-CPG-- 9 8 CPDT-3// CPDG-3// CPG/CPDG- SO-NB-P3 SO-NB-P3 SO-NB-P Qty. Qty. EPilot Operated Check Valves Pilot Operated Check Valves 9

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