






Transversal gasket

Peripheral gasket

Flushing points
Knife Gate Valve DN450-500
![]() | The knife gate valve is an ON-OFF gate valve for mudded waters. Its bevelled rectangular shovel, sliding inside a body with a circular outlet as well as its tightness system WEY®, fit particularly well the transport of mudded fluids. This valve is used for raw waste waters, mud, water with sediments, in sewage works and sewage pipes under pressure. |
Range
The knife gate valve is available from DN50 to DN1200 for a setting between flanges.
DN | PFA | Drilling template |
mm | bar | |
450-500 | 4 | ISO PN 10 |
For the other diameters refer to
RASRV28VAG700
andRASRV28VAG900
Motorized version
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Dimensional particularity for installation
The bolt holes ref. B are threaded.
The length of the bolts (B) must be adapted to the maximum screw depth on the valve, so that the gate is not blocked.
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DN | Valve assembly | Nbre de boulons par vanne Repère C | |||
Nb of screwed bolt holes (case B) | Nb of bolts per valve (case B) | Maximum screw depth | Threaded | ||
450 | 6 | 12 | 14 | M 24 | 14 |
500 | 6 | 12 | 14 | M 24 | 14 |
Material and coating
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Item | Designation | Material | Coating |
1 | Hand wheel | Epoxy power average thickness 75µm, grey colour | |
1b | Actuator Auma | Epoxy power average thickness 75µm, grey colour | |
2 | Column | Steel | Epoxy power average thickness 75µm, grey colour |
3 | Body | Cast iron Ft 25 | Epoxy power average thickness 175µm, grey colour |
4 | Screw | Steel Type Z13CF17 | |
5 | Operating nut | Bronze | |
6 | Transversal gasket | Nitrile | |
7 | Gate | Steel Type Z7CN18.09 | |
8 | Hemispherical Joint | Nitrile |
Specificity
Transversal gasket![]() |
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Peripheral gasket![]() |
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Flushing points![]() |
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Conformity to Standards
Dimensional
- distance between flanges: - ISO 5752 - NF E 29305-1 - DIN 3202
- drilling template of flanges: - ISO 7005 PN 10-16 - NF E 29206 - DIN 2532
Operating stem under frame, according to the regulation on personnel security.
Functional
- tightness test on every valve to1.1 PFA according to: - ISO 5208 - NF E 29311 - DIN 3230 Part 3
Marking
A marking of foundry is present on the body. The indication PN10 or PN16 refers to the drilling template whereas PB 4 or PB 6 corresponds to PFA 4 or 6 bars.
An identification plate PAM S.A. indicates the type, the serial number, the DN as well as the PN.
Accessories
The gate valve can be equipped with a contactor that stops the flow.
Setting, servicing, maintenance
- Assembly direction: place the bevelled part of the gate upstream.
- The knife valve is integrated between flanges. Provide the self-restrained dismantling joint type PF and flange gaskets. Note: for the setting, see absolutely that screws respect the maximum screwing depth so as they do not block the gate.
- During the use, it is possible to compress the superior transversal gasket thanks to side screws.