| These valves are designed to handle most process conditions in
the Pulp and Paper Industries, Chemical Plants, Waste Water Treatment Plants,
Sewerage Works, Mineral Processing, Mining and Food Processing Industries. |
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| The design and the materials used in this valve have been very
carefully selected to allow the company to offer one product range, which will
handle 80% of all knife gate enquiries. This is the product that is to be
considered first when evaluating the correct product that should be offered
against any customer enquiry.
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| The design of the valve could not be simpler. It consists of only five major
components:
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A one piece body
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Dual seats
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A blade or knife gate
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A simple closing mechanism
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Also, variations to the basic product are confined to a choice of stainless
steel blade, body coating and a full bore or “V” port seat. As a result, the
product lends it self to volume production and this has enabled the company to
market this product at highly competitive prices.
The valve is “Bi-directional” and in the fully opened position there is little
or no restriction in the flow of the pipeline medium, also, because the blade is
wider than the pipeline internal diameter, it seals on the flat face rather than
its edge, as is the case with many competitive products.
This offers positive sealing in direct proportion to the increase in line
pressure. Therefore the higher the pressure, the greater closure force
generated. In addition to isolating the upstream and down stream conditions, the
gate has a knife like leading edge, which allows it to cut through suspended
solids or stock when closing.
The field replaceable, pop-in style polyurethane seats feature a large section
and seating area, which allows the design to provide a seating surface that is
far removed from the flow stream. These replaceable seats offer a unique
advantage of high wear resistance, long seat life, and the convenience of easy
seat replacement. Also, it is not necessary for flange gaskets to be fitted when
these seats are used.
Caution: The adjacent pipe flange retains replaceable seats, therefore end
system valves must be fitted with a loose flange to retain the seat |
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| High Performance Heavy Duty Wafer Knife Gate Valves incorporating Field
Replaceable Seats: |
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High Quality at highly competitive prices
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Field replaceable seats extend in-line service and lowers
maintenance costs
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Dual Seats for full bore flow and positive
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Bi-Directional shut off
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'V' Port Seats available for metering service |
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Line pressure assists positive shut off |
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Solid one piece body for robustness and long service life |
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Sizes 50mm through 600mm |
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Working pressure 1000kPa through out the size range |
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Only the best non-corrosive materials are used in the operating
mechanism for reliable hand wheel operation |
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Specially profiled knife gate assures non-clogging shut off on
suspended solids and prevents blade deflection |
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Body |
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Gate |
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Ductile Iron |
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304 Stainless Steel |
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Lined (Specify) |
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316 Stainless Steel |
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Super Structure |
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Seat |
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Mild Steel |
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Polyurethane |
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| *For other materials and sizes, please consult our factory
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| Critical Dimensions and Weights: |
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Valve Size |
50 |
80 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
600 |
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Face to Face |
40 |
50 |
50 |
60 |
60 |
70 |
70 |
80 |
90 |
100 |
110 |
130 |
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Centre to Top Open |
345 |
450 |
510 |
690 |
890 |
1050 |
1180 |
1340 |
1540 |
1720 |
1860 |
2200 |
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Hand wheel |
150 |
200 |
200 |
300 |
300 |
400 |
400 |
500 |
500 |
500 |
500 |
500 |
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Weights |
10 |
12 |
14 |
26 |
40 |
63 |
85 |
130 |
180 |
250 |
300 |
340 |
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*Specifications subject to change without notice |
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Bi-Directional Knife Gate Valve (Replaceable Seats) |
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1. |
Larger Ductile Iron hand wheels reduce rim pull |
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Grease fitting for stem nut assembly (not shown) |
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Single lead thread for easier hand wheel operation reduces rim
pull |
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Stainless steel thrust washer prevents seizure of steel hub and
bronze stem nut |
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One piece fabricated yoke accepts even the heaviest actuator |
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Multiple rows of packing eliminates leakage around gate |
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Minimum clearance between gate and chest prevents clogging |
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Field replaceable seats |
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Precision polished knife gate |
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Notched gate eliminates build up of material in chest area |
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Bevelled gate with knife sharp edge for shearing action |
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