Table of Contents
Advertisement
Quick Links
Thank you for purchasing GD-46 series product. To correctly and safely use your GD-46, read
through the document attached to the product and keep it for later reference.
－－ －－ Informational items that require to take proper safety operating procedure are given as WARNING or CAUTION:－－－－
This symbol indicates a potentially hazardous situation that, if not avoided,
WARNING
could result in death or serious injury.
This symbol indicates a hazardous situation that, if not avoided, may result
in minor or moderate injury. ("Caution" may also be used to indicate other
CAUTION
unsafe practices or risks of property damage.)
GD-46 Series
Home Water Pressure Reducing Valve
Instruction Manual
Handling Precautions
１ ．Applications · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · １
２ ．Model
2.1 Composition of model name · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · １
2.2 Model list · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · １
３ ．Specifications · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ２
4.1 Dimensions and weights · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ３
4.2 Dimensions of heat insulating material · · · · · · · · · · · · · · · · · · · · · · ４
4.3 Dimensions with pressure gauge (option) · · · · · · · · · · · · · · · · · · ４
５ ．Flow characteristic curve · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ５
６ ．Noise characteristic curve ( w/o check valve) · · · · · · · · · · · · · · · · · · · · · · · · · · · · ５
７ ．Pressure characteristic curve · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ６
８ ．Operational description · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ６
9.1 Piping example · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ７
9.2 Precautions for installation ································· ８～９
10.1 Precaution for operation ······································· １１
11.1 Troubleshooting guide ········································· １２
11.2 Precaution for maintenance and inspection ····················· １２
11.3 Disassembling ··················································· １３
11.4 Troubleshooting ················································· １３
11.5 Precaution for assembly ······································· １３
11.6 Precaution for cleaning and how to clean ························ １４
12．Exploded drawing · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · １ ５
Part table · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · １ ６
13.1 Packing figure ················································· １７
13.2 Contents of packing ········································· １７
After Sale Service
Contents
■EPDT-166f■
Advertisement
Table of Contents
Troubleshooting
Related Manuals for Yoshitake GD-46 Series
Summary of Contents for Yoshitake GD-46 Series
-
Page 1: Table Of Contents
Instruction Manual Handling Precautions Thank you for purchasing GD-46 series product. To correctly and safely use your GD-46, read through the document attached to the product and keep it for later reference. －－ －－ Informational items that require to take proper safety operating procedure are given as WARNING or CAUTION:－－－－... -
Page 2: １ ．Applications
Female thread (Rc3/4) without tube end core Ｓ Water shut off valve female thread (Rc3/4) Ｄ Female thread (Rc3/4) with Reduce Valve body ２ ．２ Model list GD-46 series Water shut Body Inlet connection/joint W/o union Male union Female union off valve Female Ｇ... -
Page 3: ３ ．Specifications
３ ．Specifications ２０Ａ Nominal diameter Application City water Inlet pressure 1.0 MPa or less 0.05～0.10MPa （Ａ） （Standard setting: 0.09MPa ） 0.10～0.22MPa （Ｂ） Reduced pressure （Standard setting: 0.20MPa ） 0.20～0.30MPa （Ｃ） （Standard setting: 0.25MPa ） Minimum differential ０.０２ＭＰａ pressure Maximum pressure １０：１... -
Page 4: ４ ．Dimensions
４ ．Dimensions ４ ．１ Dimensions and weights Inlet Outlet Model GD-46PP Inlet Outlet Model GD-46SD P joint P joint L joint L joint joint (w/ check valve) (w/ check valve) Note: Connections and joints depend on model. Joint Mass Ｌ Model （... -
Page 5: Dimensions Of Heat Insulating Material
４ ．２ Dimensions of heat insulating material Heat insulating material Model GD-46PP Heat insulating material Model GD-46SD Note: The heat insulating material is two types for GD-46D,SD or the others. Water shut off valve has no insulating material. ４ ．３ Dimensions with pressure gauge (option) With type A pressure gauge With type D pressure gauge Pressure gauge... -
Page 6: ５ ．Flow Characteristic Curve
５． Flow characteristic curve ６ ．Noise characteristic curve (w/o check valve) －5－ ■EPDT-166f■... -
Page 7: ７ ．Pressure Characteristic Curve
７ ．Pressure characteristic curve This chart shows variation in reduced pressure when the inlet pressure of 0.5 MPa is changed between 0.22 MPa and 1.0 MPa while the reduced pressure is set at 0.2 MPa. ８ ．Operational description ⑱ Name of part Name of part №... -
Page 8: ９ ．Installation
９ ．Installation ９ ．１ Piping example 〔 Example.１ 〕 〔 Example.2〕 －7－ ■EPDT-166f■... -
Page 9: Precautions For Installation
９ ．２ Precautions for installation CAUTION （１）Do not disassemble the reducing valve unless it must be disassembled. ※The product has been strictly inspected at the factory. Incorrectly disassembled, the reducing valve cannot function, as it should. （２）Before connecting the reducing valve to the piping, remove the foreign materials from the piping. - Page 10 Standard number of Standard tightening torque Normal Standard screwed thread depth screwed threads diameter (mm) (N・m) (ridges) （10）Use the polystyrene foam as the thermal insulating material. （11）The band on the insulating material also serves as instruction. Attach it to the product after piping for future reference.
-
Page 11: Precaution And Procedure For Water Pressure Inspection
９ ．３ Precaution and procedure for water pressure inspection CAUTION (1) Wear protective gloves e.g. cotton work gloves when removing/installing the cap (17). ※Hand protection is required. (2) If perform pneumatic inspection with the concave position upward (Fig.1), do not sprinkle forming liquid to the O-ring (18). -
Page 12: 10．Operation
１ ０．Operation １ ０ ． １ Precaution for operation WARNING Never directly touch the product with bare hands when hot fluid is running. ※Hot fluid may cause burns. CAUTION (１）Do not disassemble the product unnecessarily. The product is adjusted to the standard set pressure at factory before shipment. -
Page 13: 11．Maintenance 11.1 Troubleshooting Guide
１ １．Maintenance １ １． １ Troubleshooting guide Problem Possible cause Corrective action １．The cap (17) is left in water pressure １．Invert the cap (17) so that its flat surface is on check status. upside. ２．Diaphragm (7) is damaged. ２．Replace the diaphragm with a new set. Reduced pressure ３．Spindle O ring (6) is damaged. -
Page 14: Disassembling
１ １． ３ Disassembling (１ ) Remove the cap (17). Unscrew the adjusting screw (15) to free the adjusting spring (14) from the load. (２ ) Remove 6 round head screws (23) from the spring cover (11). Remove the cover (11) and adjusting spring (14). -
Page 15: Precaution For Cleaning And How To Clean
１ １． ６ Precaution for cleaning and how to clean WARNING (１) Completely discharge the pressure inside of the product and piping before disassembly and inspection. Disassembly and inspection must be conducted by an experienced professional. ※Residual pressure, if any, may blow out the fluid, causing bodily injury or bringing pollution to equipment and facilities. -
Page 16: 12．Exploded Drawing
１ ２．Exploded drawing ● Refer to the following page for a part table. －15－ ■EPDT-166f■... -
Page 17: Part Table
● Part table Part No. Name of Part Part No. Name of Part 1 Body 22 O ring 2 Valve 23 Set Screw 3 Washer 24 Pressure Gauge Joint 4 Nut 26 Label 5 Spindle 27 Label 6 O ring 30 Gasket 7 Diaphragm 32 Union Nipple... -
Page 18: 13．Packing
１ ３．Packing １ ３．１ Packing figure １ ３． ２ Contents of packing Joint The main part Model P joint with L joint with K joint with Gasket of a product P joint L joint K joint check valve check valve check valve １...