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EPDT-166f

 

GD-46 Series

 

Home Water Pressure Reducing Valve

 

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:

---- 

 

WARNING

 

This symbol indicates a potentially hazardous situation that, if not avoided, 
could result in death or serious injury.

 

 

 

CAUTION

 

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 
unsafe practices or risks of property damage.) 

     

Contents

 

 
1 .

Applications

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

2 .

Model

 

2.1 

Composition of model name

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

2.2 

Model list

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

3 .

Specifications

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

4 .

Dimensions

 

4.1 

Dimensions and weights

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

4.2 

Dimensions of heat insulating material

 · · · · · · · · · · · · · · · · · · · · · ·  

 

4.3 

Dimensions with pressure gauge (option) 

 · · · · · · · · · · · · · · · · · ·  

 

5 .

Flow characteristic curve

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

6 .

Noise characteristic curve ( w/o check valve)

 · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

7 .

Pressure characteristic curve

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

8 .

Operational description

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

9 .

Installation

 

9.1 

Piping example

 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·  

 

9.2 

Precautions for installation

 ································· 

8~9

 

9.3 

Precaution and procedure for water pressure inspection

 ········ 

10

 

10

Operation

 

10.1 

Precaution for operation

 ······································· 

11

 

10.2 

Precaution and procedure for pressure adjustment

 ······· 

11

 

11

Maintenance

 

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

Packing

 

13.1 

Packing figure

 ················································· 

17

 

13.2 

Contents of packing

 ········································· 

17 

After Sale Service

 

Summary of Contents for GD-46 Series

Page 1: ...property damage Contents Applications Model 2 1 Composition of model name 2 2 Model list Specifications Dimensions 4 1 Dimensions and weights 4 2 Dimensions of heat insulating material 4 3 Dimensions...

Page 2: ...for inlet outlet Parallel male thread G1 for pipes attached to meter socket etc Male thread R3 4 compatible with cores for P V or P Female thread Rc3 4 with built in P V compatible tube end core Femal...

Page 3: ...ream of the valve 0 10 MPa or more w check valve 30 L min Pressure difference between upstream and downstream of the valve 0 10 MPa or more Pressure check function Pressure gauge joint JIS Rc1 8 Press...

Page 4: ...6KK 46KKC Rc3 4 Rc3 4 214 1 5 GD 46PL 46PLC 46PK 46PKC R3 4 Rc3 4 216 1 4 GD 46LP 46LPC 46KP 46KPC Rc3 4 R3 4 216 1 4 GD 46PG R3 4 G1 165 1 2 GD 46GP 46GPC G1 R3 4 165 1 2 GD 46LG 46KG Rc3 4 G1 163 1...

Page 5: ...Water shut off valve has no insulating material Dimensions with pressure gauge option With type A pressure gauge With type D pressure gauge Note Secure the space at least shown above before pressure...

Page 6: ...5 EPDT 166f Flow characteristic curve Noise characteristic curve w o check valve...

Page 7: ...cap nut 21 Strainer cap 11 Spring cover 44 Heat insulating material 14 Adjusting spring Before applying fluid the adjusting spring 14 compressed by the adjusting screw 15 presses down the diaphragm 7...

Page 8: ...7 EPDT 166f Installation Piping example Example Example 2...

Page 9: ...Larger the space easier the maintenance and inspection works When piping synthetic tube like polyvinyl chloride never introduce the adhesive material into the product The adhesive material can cause t...

Page 10: ...the fluid caused by temperature increase 14 If fluid remains inside the reducing valve for a long time the sliding parts become stuck resulting in malfunction of the valve 15 Do not apply excessive lo...

Page 11: ...al pressure in the piping before water pressure inspection If internal pressure remains inside remove it Remove the cap and turn it out make concave portion upward and screw it firmly onto the spring...

Page 12: ...it into the pressure gauge joint Fig 3 Remove the cap By checking the pressure gauge turn the adjusting screw to adjust the reduced pressure to a desired level Fig 4 The reduced pressure increases whe...

Page 13: ...ace the O ring 22 with a new one Retighten the union nut 33 34 and 41 Replace the gasket 30 43 Remove the pressure gauge joint 24 Apply seal tape to the threads and attach the joint to the valve body...

Page 14: ...shut off valve 41 strainer 19 and the pressure setting If they are OK follow the procedure described in 11 3 Disassembling steps 1 5 and check the diaphragm set and valve body External leakage Locate...

Page 15: ...performance When removing the strainer cap place a suitable receiver under it See Fig 6 When cleaning the strainer do not remove it from the strainer cap Disassembling the strainer may cause damage t...

Page 16: ...15 EPDT 166f Exploded drawing Refer to the following page for a part table...

Page 17: ...Gasket 7 Diaphragm 32 Union Nipple 8 Diaphragm Shell 33 Union Nut 9 Washer 34 Union Socket 10 Domed Cap Nut 35 Tube end core 11 Spring Cover 37 Nipple for Check valve 12 Valve Cap 38 Socket for Check...

Page 18: ...with check valve K joint with check valve GD 46 GD 46PP GD 46LL GD 46KK GD 46PL GD 46LP GD 46PK GD 46KP GD 46PG GD 46GP GD 46LG GD 46GL GD 46KG GD 46GK GD 46PPC GD 46LLC GD 46PLC GD 46LPC GD 46KKC GD...

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