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High performance knife gate valves
Knife gate valves in stainless steel, cast iron or nodular iron, equipped with automatic or manual actuators, bi- or uni-directional - we have knife gate valves ready to be customized to your needs.
Our product range consists of 14 different models in sizes DN 50 up to DN 1600. Our valves are known by their quality, tight and reliable shut-off and flexible design. Simple maintenance makes it easy to uphold excellent operation year after year.
MV
Stafsjö’s knife gate valve MV is designed for a wide range of applications. Principally, it’s made to handle fluids and suspensions up to 5%.
Sizes: DN 50 – DN 1200
Valve body: Stainless steel (E), Nodular iron (L) or
Carbon steel (C)
Qualities: all-round, flexible design, safe and reliable shut off and maintenace friendly
Further information... | |
HL/HG/HP/HPT
Stafsjö’s knife gate valves HL, HG, HP and HPT are equipped with a through-going gates for secure shut-off of static and high concentrated media, which often is a problematic duty for traditional valves. All types are bi-directional and tight in both pressure directions. The valves are developed for similar process conditions, but they are designed to work in different pressure classes.
Sizes: see technical data sheets for available sizes
Valve body materials: Stainless steel (E), cast iron (A) and titanium
Qualities: Through-going gate for reliable shut-off of high media concentrations, bi-directional sealing and maintenance friendly
Further information...
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XV
Stafsjö’s knife gate valve XV is a compact bi-directional valve and tight in both pressure directions. It’s specially designed with regards to good flow characteristics and simple maintenance which makes it suited for both liquids and dry media.
Sizes: DN 80 – DN 800 (PN10), 2" – 12" (ANSI)
Valve body: Stainless steel (E)
Qualities: Bi-directional sealing, compact, good flow characteristics and maintenance friendly
Further information... | |
RKO
Stafsjö’s knife gate valve RKO is a reliable solution at problematic installations. It’s ideal valve for junk traps, coarse reject and cleaners. A circular inlet and a square outlet counteract clogging and blockages of the valve. If needed, the valve can be supplied with an adaptor to a circular flange.
Sizes: DN 100 – DN 600
Valve body: Stainless steel (E) or cast iron (A)
Qualities: Square outlet, reliable in extreme operating conditions and maintenance friendly
Further information... | |
D2G
Stafsjö’s knife gate valve HG is equipped with two hard chromed gates working towards each other in the bore for fast opening and closing action. It has bi-directional sealing and is tight in both pressure directions. The valve is suitable for contaminated media and reject handling duties.
Sizes: DN 100 – DN 700
Valve body: Stainless steel (E)
Qualities: Extremely fast manouvering, Bi-directional sealing, double gates
Further information... | |
JT
Stafsjö’s JT (Junk Trap) is developed to cope with reject media in the pulp and paper industry. It consists of two types of knife gate valves: a standard RKO at the inlet and a JTV at the outlet. In between these two valves is a specially designed reject tank installed.
Sizes: DN 100-DN 150/DN 250
Material: stainless steel (E)
Qualities: Reliable and flexible solution for reject duties together with a design that minimizes wear on inner parts | |
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SLV
Stafsjö’s knife gate valve SLV is designed for slurry and abrasive applications. It is a full bore valve with minimal seat cavity for maximum flow capacity. The seat and its material composition together with embedded reinforcement rings guarantee safe actuation during tough operating conditions.
Sizes: DN 80 – DN 600
Valve body: Cast iron (A) for DN 80 – DN 300 and Nodular iron for DN 350 – DN 600
Qualities: Unique seat construction for long life-service, minimal cavity in the bore even with a fully open valve, reliable shut-off, integrated flange gaskets and maintenance friendly
Further information...
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WB
Stafsjö’s knife gate valve WB is bi-directional and tight in both pressure directions. It has full bore with very small cavities. The valve has integrated flange gaskets for simple installation. It’s developed primarily for biogas industries and water and waste water plants.
Sizes: DN 50 – DN 1000
Valve body: Cast iron (A)
Qualities: Bi-directional sealing, integrated flange gaskets, small cavities in the bore
Further information... | |
BV
Stafsjö’s knife gate valve BV is bi-directional and tight in both pressure directions. It’s designed for water and waste water segement. The valve is available in PN10- och ANSI-version with fully lugged body in many sizes.
Sizes: DN 50 – DN 600 (PN10), 80”-600” (ANSI)
Valve body: Cast iron (A)
Qualities: Bi-directional sealing, fully lugged sizes, robust
Further information... | |
RKS
Stafsjö’s knife gate valve RKS is an isolating valve designed for low pressure systems in water supply, sewer systems and other applications such as wet and dry sludge handling, pellets or similar where a quadratic in- and outlet is needed.
Sizes: 200x200 mm – 1000x1000 mm
Valve body: Stainless steel (E)
Qualities: Quadratic in- and outlet, many available sizes and combinations, robust welded construction
Further information... | |
TV
Stafsjö’s knife gate valve TV is used as an isolation valve for a transmitter or sensor on a tank for which a short face-to-face length is required.
Sizes: DN 80
Valve body: Stailess steel (E)
Qualities: short face-to-face, unique flange drilling, fast maneuvered
Further information... | |
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