background image

Diaphragm Pressure Keeping Valve 
 

 
Operating Instructions

 

 

 

TA  49 

Rev. 

13  en 

05/2016 

Technical modifications reserved! 

www.sera-web.com 

 

3.5 

Intended use 

 
 

sera

  diaphragm  pressure  keeping  valves  are  only  to  be  de-

ployed  according  to  the  intended  purpose  stated  in  the  order 
confirmation. 

sera

 does not assume any responsibility for damage resulting 

from  an  operation  which  does  not  conform  with  the  intended 
use. 
If the diaphragm pressure keeping valve is to be used for other 
applications, then the suitability of the valve for the new operat-
ing conditions must be discussed with 

sera

 beforehand! 

 
 
Criteria  for  proper  operation  of  the  diaphragm  pressure  keep-
ing valve: 
 

 

Max. operating pressure of the diaphragm pressure keep-
ing valve 

 

Observe  characteristics  of  the  pumped  medium  (please 
see safety-  and  product  data  sheet  of  the  pumped  medi-
um 

– the safety data sheet is to be provided by the sup-

plier of the chemical) 

 

Resistance  of  the  materials  which  come  in  contact  with 
the pumped medium 

 

Operating conditions at the place of installation 

 

Temperature of the pumped medium 

 
 

sera

  does  not  assume  any  responsibility  if  these  criteria  are 

not or only partly observed by the owner / operator. 
 
 

 

CAUTION ! 

 
The  structural  design  of  the  diaphragm  pressure  keeping 
valve must not be changed! 
 

 
 
 

3.6 

Approved installation-, maintenance and 
operating personnel 

 
 
The  system  operator  may  only  approve  persons to  operate  or 
maintain the unit, who are at least eighteen years old and suit-
ably  qualified,  and  of  a  physical  and  mental  state  to  perform 
the  tasks  entrusted  to  them.  These  persons  must  be  properly 
instructed and act responsibly, properly and reliably. The oper-
ating  personnel  must  be  familiar  with  all  applicable  accident 
prevention and safety instructions and regulations. 
 
 
 
 

3.7 

Personal protection for maintenance and 
service 

 
 
In order to avoid risks to health, the provisions of the German 
Ordinance  on  Hazardous  Substances  (GefStoffV)  (§14  Safety 
Data  Sheet)  and  relevant  national  safety  regulations  for  the 
pumped  medium  and  the  operating  conditions  of  the  dia-
phragm pressure keeping valves must strictly be adhered to. 
 
 
 

 

CAUTION ! 

 
Wear  protective  clothing,  gloves,  and  a  face  protecting 
mask. 
 

 
 
 

 

CAUTION ! 

 
Personal  protective  equipment  must  be  provided  by  the 
owner! 
 

 
 

Summary of Contents for 620.D

Page 1: ...ype and serial number of your diaphragm pressure keeping valve can be read off the type plate on the diaphragm pressure keeping valve Type Serial No These data are important in case of queries or for...

Page 2: ...al protection for maintenance and service 5 4 Areas of application and function 6 5 Test identification 6 6 Checking the packaging at the place of destination 6 7 Storage 6 8 Technical specifications...

Page 3: ...side of the pump 2 Types 2 1 Type plate Each sera diaphragm pressure keeping valve is factory pro vided with a type plate The following information can be found on this type plate 1 2 3 4 5 6 Fig 01 T...

Page 4: ...orresponding accident pre vention measures to protect operating personnel from danger through the pumped media used 3 2 Marking of notes 3 2 1 Marking of notes in these operating instructions Special...

Page 5: ...e of installation Temperature of the pumped medium sera does not assume any responsibility if these criteria are not or only partly observed by the owner operator CAUTION The structural design of the...

Page 6: ...2 6 Checking the packaging at the place of destination On delivery immediately check the packaging for damage Report any external damage immediately to the transport company and fill in a damage repor...

Page 7: ...oose flange Fig 03 Dimensions Type DN G A B H L1 n g 1 i 1 p 1 L2 D k s d PP PVC 620 D 8 G 50 38 80 80 13 M5 15 5 110 90 60 12 10 14 622 D 15 G 1 72 54 90 115 15 M8 17 8 145 95 65 12 11 14 623 D 20 G...

Page 8: ...eserved TA 49 Rev 13 en 05 2016 L g DN n H p i G q B q A 8 1 2 1 4581 design Connection Thread pipe connection Fig 04 Dimensions Type DN G A B H L n g 1 i 1 p 1 620 D 8 G 50 38 80 110 13 M5 10 5 622 D...

Page 9: ...cording to DIN 2501 PN 10 ANSI 150 lbs sq in Fig 05 Dimensions Type DN A B H L D 1 D 2 k 1 k 2 l 1 l 2 623 D 20 80 60 125 150 105 99 75 70 14 16 624 D 25 90 68 130 160 115 108 85 79 14 16 625 D 32 100...

Page 10: ...4000 4 0 626 D 10 1 0 7 0 7000 6 7 627 D 10 1 0 7 0 10000 9 12 Table 05 Technical data 9 Installation The diaphragm pressure keeping valve is to be installed in the pressure line The cover is to be mo...

Page 11: ...nction of the diaphragm pressure keeping valve installed in the pressure line of the dosing pump is as follows The diaphragm closes the inlet channel by the pressure spring initial tension and thus th...

Page 12: ...ssure keeping valves are factory set to the set pressure stated in the order confirmation A seal ing wax seal is located on the transition piece between lid and cover 12 Operation in explosion hazardo...

Page 13: ...alve Operating Instructions TA 49 Rev 13 en 05 2016 Technical modifications reserved www sera web com 13 13 1 Spare and wearing parts kit Fig 12 Spare and wearing parts kit 2 3 4 5 9 7 8 10 11 12 13 1...

Page 14: ...ose flange Item Designation 1 Hexagon screws 2 Disks 3 Lid 4 O ring 6 Cover 15 O rings 16 Valve body 17 Disks 18 Nuts Valve body kit 1 4581 Item Designation 1 Hexagon screws 2 Disks 3 Lid 4 O ring 6 C...

Page 15: ...opened Observe the EC safety data sheets CAUTION The diaphragm may only be replaced by authorized and qualified personnel 14 2 Changing the diaphragm Unscrew the lid Measure dimension T of the set sc...

Page 16: ...mp system and secure it against restart ing Make sure that all pipes with diaphragm pressure keeping valves are depressurized Drain the diaphragm pressure keeping valve and the connected pipes using d...

Page 17: ...ations for pre vention of accidents and the environmental protection regula tions such as the Waste Management Act and the German Household Water Act to protect their employees or man and the environm...

Page 18: ...Diaphragm Pressure Keeping Valve Operating Instructions 18 www sera web com Technical modifications reserved TA 49 Rev 13 en 05 2016...

Page 19: ...Diaphragm Pressure Keeping Valve Operating Instructions TA 49 Rev 13 en 05 2016 Technical modifications reserved www sera web com 19 Notes...

Page 20: ...Diaphragm Pressure Keeping Valve Operating Instructions 20 www sera web com Technical modifications reserved TA 49 Rev 13 en 05 2016 Notes...

Reviews: