Reducing Valve/Reducing Valve with Check Valve Nomenclature JIS graphic symbols for hydraulic system JGB JGBC Features - JGB - - - Applicable fluid code No designation: Petroleum-based hydraulic fluid, water-glycol hydraulic fluid F: Phosphate ester hydraulic fluid Model No. JGB: J series reducing valve Check valve code No designation: Without check valve C: With check valve Connections G: Gasket mount type T: Screw connection type F: Flange connection type Used to set the pressure of a certain range of a hydraulic circuit lower than the main circuit. Maintains the secondary side pressure regardless of changes in the primary side main circuit pressure. The branch circuit pressure can be controlled remotely by connecting a relief valve for remote control to the vent port. Note: Contact Daikin separately for the delivery term of the products that accept phosphate ester hydraulic fluids. Specifications Nominal diameter : ⅜ : ¾ : ¼ : Pressure adjustment range :.8 to MPa { 8 to kgf/cm } :. to MPa { to kgf/cm } Design No. (The design No. is subject to change) : Gasket mount type (G), screw connection type (T) <With nominal diameter (⅜)> : Gasket mount type (G), screw connection type (T) <With nominal diameter of (¾), (¼)> : Flange mount type (F) <With nominal diameter of (¾), (¼)> : Flange mount type (F) <With nominal diameter of ()> PRSSUR CONTROL VALVS Model code Gasket mount type (G) Screw connection type (T) Flange mount type (F) Nominal Maximum operating pressure diameter MPa {kgf/cm } Pressure adjustment range MPa {kgf/cm } JGB(C)-G-- JGB(C)-T--.8 to { 8 to } ⅜ JGB(C)-G-- JGB(C)-T--. to { to } JGB(C)-G-- JGB(C)-T-- JGBC-F--.8 to { 8 to } ¾ JGB(C)-G-- JGB(C)-T-- JGBC-F--. to { to } {} JGB(C)-G-- JGB(C)-T-- JGBC-F--.8 to { 8 to } ¼ JGB(C)-G-- JGB(C)-T-- JGBC-F--. to { to } JGBC-F--.8 to { 8 to } JGBC-F--. to { to } Maximum flow rate L/min Drainage rate L/min.8 to.9 to. 8. to. to. Model code Pressure change MPa {kgf/cm } per handle revolution Model code Pressure change MPa {kgf/cm } per handle revolution JGB(C)- -. {}/revolution JGBC-F-. {}/revolution JGB(C)- -.9 {9}/revolution JGBC-F-. {}/revolution Mass (kg) Model No. JGB JGBC Model No. JGB JGBC Model No. JGBC JGB(C)-G.9. JGB(C)-T.. JGBC-F.8 JGB(C)-G.. JGB(C)-T.. JGBC-F.8 JGB(C)-G.8. JGB(C)-T. JGBC-F. -9
Sub-plate model code The sub-plate is not provided with the valve. Order it separately as required by specifying the model code given in the table below. Model code Nominal diameter Connection port diameter Mass kg JGB-M Rc⅜ ⅜ JGB-M Rc½. JGB-M Rc¾ ¾ JGB-M8 Rc.9 JGB-M Rc¼ ¼ JGB-M Rc½. Refer to Page S- for the dimensions of the sub-plate. Accessories Connections Model No. Hexagon socket head cap bolt Number Tightening torque N m {kgf cm} JGB(C)-G M Gasket mount type JGB(C)-G M 8 8 to {8 to } JGB(C)-G M Flange connection type Flange (JIS B 9 SSA), O-ring, mounting bolts Handling Directly connect the drain piping to the tank without merging it with other tank piping. To ensure good pressure reducing performance, set the primary side main circuit pressure and the secondary pressure reducing circuit pressure such that there is a minimum difference of MPa { kgf/cm }. When using the valve in combination with a direct operated relief valve for remote control, connect the remote control valve to the vent port. Since excessive internal volume of the vent piping may lead to vibration, use steel pipes with an inner diameter of mm maximum and thick walls for piping. The orientation of the pressure adjusting handle can be changed by rearranging the covers. (See external dimension diagrams [I], [II] and [III].) Performance curves (viscosity: mm /s {cst}) Flow rate - Pressure characteristics Solid line: With a primary pressure of MPa { kgf/cm } Dashed line: With a primary pressure of MPa { kgf/cm } JGB(C)- JGB(C)- JGB(C)- (MPa) { kgf/cm } (MPa) { kgf/cm } (MPa) { kgf/cm } 8 JGBC-F (MPa) { kgf/cm } -
Performance curves (viscosity: mm /s {cst}) Pressure drop characteristics JGB(C)-G JGB(C)-T Pressure drop (MPa) { kgf/cm } JGB(C)-G JGB(C)-T JGBC-F Pressure drop (MPa) { kgf/cm }............ Pressure drop (MPa) { kgf/cm } Pressure drop (MPa) { kgf/cm }............ Pressure drop (MPa) { kgf/cm }...... PRSSUR CONTROL VALVS JGB(C)-G JGB(C)-T JGBC-F Pressure drop (MPa) { kgf/cm }..8... 8 Pressure drop (MPa) { kgf/cm }..8... Pressure drop (MPa) { kgf/cm }..8... 8 8 JGBC-F Pressure drop (MPa) { kgf/cm }.... Note: OUT IN (I): Passing resistance of the check valve only OUT IN (II): Passing resistance of both the check valve and reducing valve spool (fully open) IN OUT: Passing resistance of the reducing valve spool (fully open) only -
xternal dimension diagram JGB-T (T, T) -Rc"F" N [III] (secondary Maxmum B Maxmum. 8 Stroke G [II] (primary A φ8 (Secondary -Rc"F" G H [I] connection port (secondary JGBC-T (T, T) L J D C connection port (primary 8 Stroke Vent port Remove the plug when connecting the vent piping. Maxmum B Lock nut [I] Drain port: Model No. A B C D F G H J L N JGB(C)-T 9. (8.). ⅜ 9.. (.) JGB(C)-T 9 (.) 8.. ¾. 9. 9. () JGB(C)-T 8 8. (8.) 9 8 ¼ 8. 8... 8.. (.) Dimensions in parentheses are for JGB(C)-T. JGB-G (G, G) Vent port Lock nut JGBC-G (G, G) Maxmum S Stroke 8 R Vent port Remove the plug P when connecting the vent piping. (Primary Drain port (Secondary H connection port (secondary A B C D F Port ( ) G J connection port (primary H φ8 (primary (secondary G only φ. Vent port Remove the plug when connecting the vent piping. φ φ J - φl φn φ [II] (primary φ (primary (secondary (Primary Drain port Mounting face (conforming standard) J JGB(C)-G: ISO 8---- JGB(C)-G: ISO 8-8--- JGB(C)-G: ISO 8---- Note: Plug the vent port when no vent piping is connected.block the port marked with an asterisk ( ) with the mounting face. Model No. A B C D F G H J L N P R S T JGB(C)-G 88.... 8. 8.9. 9 9. 89 JGB(C)-G...... 8 9. JGB(C)-G... 8. 9 8.
xternal dimension diagram JGBC-F (F) connection port (Secondary -M"G" depth "H" -φ"f" L P J M N φ8 Maximum. 8 Stroke (Primary (Secondary Hexagonal flat lock nut: (Primary A B Drain port: C D Vent port Remove the plug when connecting the vent piping. PRSSUR CONTROL VALVS Model No. A B C D F G H J L M N P JGBC-F 9 8 9 8 JGBC-F 9 9 9. 8. 8 9. JGBC-F connection port (Secondary 9. Vent port Remove the plug when connecting the vent piping. Drain port -φ -M, depth. 8. 9.8 φ8 8 Stroke Maximum. (primary (Secondary 8. Hexagonal flat lock nut: (primary. -
Sectional structural diagram JGBC-G JGBC-T 9 8 9 9 8 8 8 9 JGBC-F 9 8 Sealing part table Part specifi cations Part No. Name Quantity JGB-T JGBC-T JGB-G JGBC-G JGB-T JGBC-T JGB-G JGBC-G O-ring JIS B BP JIS B BP JIS B BP JIS B BP JIS B BG JIS B BG JIS B BG JIS B BG O-ring JIS B AP JIS B AP JIS B AP JIS B AP JIS B AP JIS B AP JIS B AP JIS B AP 8 O-ring JIS B BP JIS B BP JIS B BP JIS B BP JIS B BP JIS B BP JIS B BP JIS B BP 9 O-ring JIS B BP JIS B BP JIS B BP JIS B BP O-ring JIS B BP JIS B BP JIS B BP JIS B BP O-ring JIS B BP JIS B BP JIS B BP JIS B BP Part specifications Part No. Name Quantity JGBC-F JGB-T JGBC-T JGB-G JGBC-G JGBC-F JGBC-F O-ring JIS B BG JIS B BG JIS B BG JIS B BG JIS B BG JIS B BG JIS B BG O-ring JIS B AP JIS B AP JIS B AP JIS B AP JIS B AP JIS B AP JIS B AP 8 O-ring / (F) JIS B BP JIS B BP JIS B BP JIS B BP JIS B BP JIS B BP 9 O-ring JIS B BP JIS B BP JIS B BP JIS B BG JIS B BP8 O-ring JIS B BP JIS B BP O-ring JIS B BG JIS B BG O-ring JIS B BG JIS B BG JIS B BG -