Burkert Type 2031 - Handbuch (Seite 9)

2030/2031 - 9
english
Caution!
Observe torque (see table)!
• Examine valve for reliable operation and tightness.
Table: Diaphragm packaged
orifice
(Diaphragm
size)
Dn [mm]
order numbers for diaphragms
epDM
(aB)
epDM
(aD)
fkM
(ff)
ptfe
(ea)
advanced
ptfe
(eu)
laminated
advanced
ptfe (et)
8 677 663 688 421 677 684 677 674 679 540 677 694
15 677 664 688 422 677 685 677 675 679 541 677 695
20 677 665 688 423 677 686 677 676 679 542 677 696
25 677 667 688 424 677 687 677 677 679 543 677 697
32 677 668 688 425 677 688 677 678 679 544
40 677 669 688 426 677 689 677 679 679 545 677 698
50 677 670 688 427 677 690 677 680 679 546 677 699
65 677 671 688 428 677 691 677 681 679 743
Table: Torque
orifice
(Diaphragm
size)
Dn [mm]
tightening torques for diaphragm
(approx. values) [Nm]
EPDM / FKM
PTFE / advanced PTFE /
laminated advanced PTFE
8 2,5 2,5
15 3,5 4
20 4 4,5
25 5 6
32 6 8
40 8 10
50 12 15
65 20 30