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KNIFE GATE VALVE WB14

Product catalog summary

Overview: The document provides detailed specifications and configurations for the Stafsjö WB14 knife gate valve, highlighting its superior flow characteristics, bi-directional zero leakage shut-off, and suitability for various fluids including water, sludge, biomass, and light slurry. The valve is modular and customizable with different materials and actuators.

Specifications: The WB14 features a robust one-piece valve body in nodular iron for sizes up to DN 300, and a two-piece version from DN 350. It includes integrated flange gaskets for simplified installation and is suitable for dead-end services. The valve is available in different materials such as EPDM, Nitrile, and FEPM for the seat, and stainless steel for the gate.

Sealing System: The WB14 valve's sealing system is designed for efficiency and safety, featuring Stafsjö's TwinPack braids for external sealing, which offer high mechanical strength and chemical resistance. The system ensures a tight shut-off independent of pressure direction.

Configurations: The standard version is available in sizes DN 50 - DN 600 with a maximum working pressure of 10 bar. High-pressure versions are available for DN 350 - DN 600. The valve body is made from nodular iron, and the gate from stainless steel or duplex stainless steel.

Design Standards: The valve complies with various design standards, including EN558-1, ISO 5752, and MSS-SP81. It meets the pressure equipment directive 2014/68/EU and is CE marked where applicable. Pressure tests are conducted according to EN 12266-1:2003.

Options and Accessories: The valve can be equipped with various actuators, including hand wheel, chain wheel, pneumatic cylinders, and electric actuators. Additional accessories include limit switches, solenoid valves, and positioners.

Dimensions and Flange Drilling: Detailed dimensions and flange drilling specifications are provided for different standards, including EN 1092 PN10/PN16, ASME/ANSI B16.5 Class 150, and AS 2129 Table D and E.

Catalog excerpts

Data is only for informational purpose. All specifications are subject to change without notice. First in knife gate solutions 2020-10-15 issue 11

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Knife gate valve WB14 Stafsjö's WB14 knife gate valve offers superior flow characteristics and bi-directional zero leakage shut-off. It is suitable for fluids such as water, sludge, bio mass and light slurry. Integrated flange gaskets simplify installation works and the fully lugged body makes it also suitable for dead-end services. The WB14 valve is modular designed and it can easily be customized in materials, with actuators and related automation accessories to different process conditions. It is supplied with a robust one piece and fully lugged valve body in nodular iron up to DN 300 and...

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The WB14 sealing system up to 260 °C. The gland (2) and gland bolts ensure even distribution of the gland force as the nuts are tightened. The valves' integrated flange (3) gaskets simplify the installation works and preserve a tight flange sealing. The perimeter resilient seat guarantee a tight sealing independent of pressure direction and the steel reinforcement (4) makes it steady and enhance durability. The linear locks (5) on the gland up to DN 300 securely hold the steel reinforced seat in position as the gate strokes. From DN 350 the seat is locked between the valve body halves. The WB14...

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Pressure class Max working pressure at 20 °C High pressure 10 bar version Sizes: DN 50 - DN 600 Valve body: Nodular iron EN 5.3105, EN-JS1050, GGG50 Gate: Stainless steel EN 1.4301, AISI 304 Box packing: TwinPack Top works: Stainless steel tie rods encapsulated in aluminium beams including stainless steel gate guards on automated valves Options and others from below. Sizes: DN 350 - DN 600 Valve body: Nodular iron EN 5.3105 Gate: Duplex stainless steel EN 1.4462, S32205 Box packing: TwinPack Top works: Stainless steel tie rods encapsulated in aluminium beams including stainless steel gate guards...

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One piece valve body: DN 50 - DN 300 Two piece valve body: DN 350 - DN 600 Hand wheel Coated cast iron Anodized aluminium Coated carbon steel ASTM A216 WCB, coated nodular iron EN-JS1050, GGG50 Slide washer Valve body Flange sealing Valve body boltings Zinc plated steel Gate guards Pneumatic cylinder See separate data sheet 1) Recommended spare parts

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One piece valve body: DN 50 - DN 300 M S Two piece valve body: DN 350 - DN 600 I 1) Face-to-face dimension according to EN558-1 series 20/ISO 5752 series 20 for valves DN 50 - DN 350 with flange drilling according to EN 1092 PN 10, EN 1092 PN 16, AS 2129 Table D and E. 2) Face-to-face dimension according to MSS-SP81 for valves DN 50 - DN 600 valves with flange drilling according to ASME/ANSI B 16.5 Class 150 and for valves DN 350 - DN 600 with flange drilling according to EN 1092 PN 10, EN 1092 PN 16, AS 2129 Table D and E. 3) Dimensions for standard pressure rated valve. 4) Recommended sizing...

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Flange drilling according to EN 1092 PN10 DN Bolt circle diameter (mm) Number of throughgoing bolts Number of tapped holes/side Boltsize Bolt lengths (mm) 1) Flange drilling according to EN 1092 PN16 DN Bolt circle diameter (mm) Number of throughgoing bolts Number of tapped holes/side Boltsize Bolt lengths (mm) 1) Flange drilling according to ASME/ANSI B 16.5 Class 150 DN Bolt circle diameter (mm) Number of throughgoing bolts Number of tapped holes/side Boltsize Bolt lengths (mm) 1) Flange drilling according to AS 2129 Table D DN Bolt circle diameter (mm) Number of throughgoing bolts Number of...

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