Knife Gate Valves Type A
The Knife Gate Valve is a uni-directional wafer valve for general industrial application.
The nominal widths available range from DN050 to DN1200 with flange connections complying with EN 1092-2 PN10 or alternatively, ANSI B16.5.
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Knife Gate Valves Overview.
Applications of Knife Gate Valve type A
It is predominantly used in the paper and pulp, chemical, and mining industries, in power station technology and the food industry.
However, it is increasingly being used in biogas plants, sewage treatment plants, and in the sugar, steel and animal feed sectors.
Actuators of Knife Gate Valve type A
Drive variants include a manually actuated handwheel model with rising or non-rising stem, or alternatively a hand lever drive unit, or double-and single-acting pneumatic cylinders (spring return) and electric actuators.
- Knife Gate Valve, solenoid actuated
- Knife Gate Valve, pneumatically actuated
- Knife Gate Valve, handwheel actuated
- Knife Gate Valve, handwheel actuated
- Knife Gate Valve, hand lever actuated
The structure of the unidirectional Knife Gate Valves encompasses a so-called wafer style cast monoblock body, with raised face and reinforced ribs for larger nominal diameters for extra body strength.
The monoblock body is available in either grey cast iron (GG25) or alternatively in stainless steel AISI 1.4408 (CF8M).
The slide plate is manufactured using stainless steel AISI 304 or AISI 316 as standard. The plate radius of the slide gate has a bevelled cutting edge. As a result, solids can be cut through, achieving a tight seal in the closed position. On request, the thickness of the Knife Gate Valves plate can be increased for higher operating pressures and/or higher quality material can be used.
The slide plate's seat in the monoblock body is sealed tight by an elastomer seal in a stainless steel retainer ring; however, this can also be achieved without the elastomer seal (sealed with metal).
The standard material used for the Knife Gate Valve elastomer seal is EPDM.
Alternatively, nitrile, viton, PTFE or silicone (conformed to FDA) are available.
The gland packing consists of several layers of braided fibre.
An EPDM o-ring is additionally integrated into the layers gland packing as standard.
In addition to greased cotton, a PTFE-coated synthetic fibre, braided PTFE, graphite, ceramic fibre or Dynapack can be used for the braided fibre.
Maximal operating pressures for AKO Knife Gate Valve type A:
DN050-DN250: 10 bar
DN300-DN400: 6 bar
DN450: 5 bar
DN500-DN600: 4 bar
DN700-DN1200: 2 bar
Adam-Opel-Str. 5
65468 Trebur-Astheim, Germany
Phone: +49 (0) 6147-9159-0
Fax: +49 (0) 6147-9159-59
13 Alvis Way
Royal Oak Trading Estate
Daventry, Northants NN11 8PG
Great Britain
Phone: +44 (0) 13 27 31 27 47
Fax: +44 (0) 13 27 31 25 65
sales@ako-valves.com 
www.pinch-valve.com
Contact for sales in Great Britain and Ireland.
Data sheets:
Knife Gate Valve type A.pdf (1.5 MB)
Instructions:
Type A-Installation, Operation and Maintenance Manual.pdf (1.3 MB)