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DOKUMENTACJA TECHNICZNO RUCHOWA 

03-2016 

 

3

 

1 TECHNICAL DESCRIPTION 
 
1.1 PRODUCT DESIGNATION AND IDENTIFICATION 

 

        The subject of this Operation and Maintenance Manual is
Type 2005, 2905 two-way flange-to-flange knife gate valve 

- full bore design 
- stainless steel knife (closer) 
- available with rising or stationary spindle  
- soft gland seal of the closer and the body 

              - drive gear guard. 
 

1.2 USE 
 

The  Type  2005,  2905  two-way  flange-to-flange  knife  gate  valves  are  intended  for  water  supply 

systems, and especially sewage systems, and industrial processing systems. The valves can be operated both 
in underground and overground installations as installed in vertical or horizontal pipelines. 

 
CAUTION 
 

Due  to  the  limitations  causes  by  application  of  specific  materials  in  various  operating 

environment  types,  it  is  critical  to  precisely  determine  the  operating  conditions,  i.e.  the  temperature, 
pressure and medium characteristics. This will eliminate any problems during operation of the valve. 

 
1.3 TECHNICAL CHARACTERISTICS 

 

         The flange-to-flange knife gate valves are intended for transfer of potable water, process water and  
   sewage, as  well as other liquids as approved by the manufacturer. 
 

- Operating temperature:  to +70

°

 

- Nominal diameter (dimension) range: D50 to DN1000 [mm] 
- Maximum medium flow rate: 

- liquid: max. 4 [m/s] 

                                                                      - gas: max. 30 [m/s] 
 

- The driving torque at opening start and closing end is as listed below: 

 

DN 
[mm] 

40 

50 

65 

80 

100  125  150  200  250  300  350  400  450  500  600  700 

800  900 

1000 

Mmax 
[Nm]
 

20 

20 

25 

30 

40 

50 

55 

55 

60 

80 

105  150  160  200  280  480 

510  600 

680 

 

- Valve control mode: the standard version of knife gate has the clockwise closing sense of rotation. 

The closing sense of rotation can be opposite on special order. 

- The knife valves are designed for installation between flange end faces acc. to PN-EN 1092-2: 1999 

with bolt holes for the pressure rating of PN10. 

- Installation length: per the technical file, see for sizes. 
- Nominal pressure PN values: - per size: 

DN40 to DN400  - 

1.0 MPa 

DN500 to DN600 

- 0.6 MPa 

DN700 to DN1000 

- 0.25 MPa 

 

2 DESIGN 
 
2.1 DESCRIPTION OF THE VALVE DESIGN 

 

         The Type 2005, 2905 two-way flange-to-flange knife gate valves supplied by F.A. „JAFAR”S.A.  
feature a full bore body, a stationary spindle (in the standard version) or a rising spindle, the closure seal  
with a square section with a knife guide and placed in the body seat. The knife seal is reinforced by a  
stainless steel bar which prevents washing the seal from the seat. The body seal of the knife is a multi-  

Summary of Contents for 2005

Page 1: ...t of the JAFAR S A factory The user s failure to follow the guidelines and regulations provided in the following operating and maintenance manual releases the manufacturer from obligations and warrant...

Page 2: ...ALVE DESIGN 3 2 2 MATERIALS 4 2 3 DIMENSIONS 5 2 4 STANDARDISATION 7 2 5 ORDERING 7 2 6 PRODUCTION AND ACCEPTANCE 7 2 7 MARKING 7 3 PROTECTION STORAGE TRANSPORT 8 3 1 PROTECTIVE COATINGS 8 3 2 PACKAGI...

Page 3: ...liquids as approved by the manufacturer Operating temperature to 70 C Nominal diameter dimension range D50 to DN1000 mm Maximum medium flow rate liquid max 4 m s gas max 30 m s The driving torque at...

Page 4: ...able lists the structural materials of the flange to flange knife gate valves Item Part designation Material Reference standard 1 Body Cast iron EN GJS 400 15 PN EN 1563 2012 2 Gland Cast iron EN GJS...

Page 5: ...250 350 395 319 23x8 680 5665 52 52 300 400 445 370 23x8 794 8755 62 63 350 460 505 430 23x10 M20x6 890 11640 72 83 400 515 565 480 28x10 M24x6 86 990 15520 68 98 500 620 670 582 28x12 M24x8 1820 2231...

Page 6: ...460 505 430 23x10 M20x6 1180 72 106 400 515 565 480 28x10 M24x6 86 1286 68 146 500 620 670 582 28x12 M24x8 1520 85 282 600 725 780 682 31x12 M27x8 1725 102 332 700 840 895 794 31x14 M27x10 165 2018 11...

Page 7: ...screw threads Tolerances Principles and basic data PN ISO 2903 1996 ISO metric trapezoidal screw threads Tolerances PN EN ISO 4762 2006 Hexagon socket head cap screws PN ISO 1629 2005 Rubber and lati...

Page 8: ...OTECTIVE COATINGS All internal and external cast iron surfaces are protected with epoxy paint applied using the electrostatic method The paint has a certificate allowing for its use in contact with fo...

Page 9: ...d for mounting between flange ends of the pipelines sized for the PN10 bolt hole layout acc to PN EN 1092 2 1999 The gland on the delivered valve is loose and must be tightened before installation 4 2...

Page 10: ...M33 1630 1940 2700 M36 2100 2490 3500 M39 2720 3220 4550 Table of maximum tightening torques for individual bolts for tightening the knife gate valve gland Note that the system must not expose the val...

Page 11: ...DOKUMENTACJA TECHNICZNO RUCHOWA 03 2016 11 1 Knife gate 2 Pipeline flange end 3 Assembly bolt 4 Seal 5 Nut 6 Washer...

Page 12: ...5 K mm 125 145 160 180 210 240 295 350 400 lxn 4x18 4x18 6x18 6x18 6x18 6x22 10x22 8x22 8x22 Thread in bolts l x M x length 4 M16 x25 4 M16 x25 4 M16 x30 4 M16 x30 4 M16 x40 4 M20 x40 4 M20x 40 8 M20...

Page 13: ...and closed Lubricate the knife for a better slip with a dry Teflon grease in spray e g Pulsar or Kontaflon 85 Relubricate every 20 full cycles more frequently in harsh operating conditions Coat the k...

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