Knife Gate Valve - T200 - UNIDIRECTIONAL | Zubi | Philippopoulos s.a.
Knife Gate Valve - T200 - UNIDIRECTIONAL | Zubi | Philippopoulos s.a.
Knife Gate Valve - T200 - UNIDIRECTIONAL | Zubi | Philippopoulos s.a.
Knife Gate Valve - T200 - UNIDIRECTIONAL | Zubi | Philippopoulos s.a.

Knife Gate Valve - T200 - UNIDIRECTIONAL | Zubi

Knife Gate Valve Zubi T200 Unidirectional

The Zubi T200 Unidirectional is a full bore isolation knife gate valve with a cast monoblock body and internal knife guides. It provides unidirectional sealing; the installation must ensure that the higher pressure pushes the knife towards the seat. In the opposite direction, allowable pressure is limited to approximately 1/3 of the nominal.

Operating Limits

  • DN50–DN250: 10 bar
  • DN300–DN450: 6 bar
  • DN500–DN600: 4 bar
  • DN700–DN1200: 2 bar
  • Suspended solids: up to approximately 5%
  • Testing: UNE-EN 12266-1
  • Flanges: EN1092 PN10/16 as standard, with other drillings available upon request.

Fluids and Applications

Used for isolation in water, wastewater, pulp, biomass, mining, bulk handling, chemical circuits, and auxiliary power plant lines. Not a control valve; primarily selected for on/off isolation where fibers, sludge, or low solid content are present.

Materials and Sealing

Body: GG25, GGG40/50, CF8, CF8M, 904L, Duplex, Superduplex, and special alloys.
Knife: AISI304L, AISI316L, 254SMO, Hardox, or special alloys.
Seats: EPDM, NBR, Viton, Silicone, PTFE, RPTFE, Graphite, Flucast.
Packing: Synt+PTFE, pure PTFE, or graphite. Seat selection based on pH, temperature, corrosiveness, and sealing requirements.

Actuation

Available with handwheel, lever, gearbox, chain wheel, single or double-acting pneumatic cylinder, electric or hydraulic actuator. For pneumatic cylinders, 5–6 bar dry, filtered, and lubricated air is recommended.

Maintenance

Flange alignment, cross-tightening, and gland packing inspection are required after line pressure. Excessive tightening increases operating torque and reduces packing lifespan.

Datasheet and documents

Description

Main Features

  • Made in one strong piece casted Monoblock body
  • Seating wedges help the knife to close against the body and seat.
  • Directional arrow in the body showing the correct mounting position.
  • High flow rates with low pressure drop.
  • Internal design avoids any build up of solids that would prevent valve from closing.
  • Polished gate with rounded edges prolongs the working life of the rings and packing.

DIRECTIVAS

  • DIR 2006/42/CE (machinery)
  • DIR 2014/68/EU (PED) Fluid Group 1(b), 2 (Cat. I. mod. A)
  • DIR 2014/34/EU (ATEX) Area 2&22

Technical Data

FLANGE CONNECTION

  • PN6/PN10/PN16/PN25/PN40
  • ANSI125/150
  • BST E / BST D
  • JIS 5K JIS10K
  • AS-2129-D/E

SIZES & PRESSURES

  • DN50 to DN250: 10 bar
  • DN300 to DN450: 6 bar
  • DN500 to DN600: 4 bar
  • DN700 to DN1600: 2 bar

(Higher design pressures on request)

TIGHTNESS

  • Metal/Metal
  • PTFE
  • Watertight

MATERIALS

BODY GG25, GGG40, A216 WCB, CF8 (AISI304), CF8M (AISI316), CF3M (AISI316L), 254SMO, 654SMO, AISI310, AISI904, DUPLEX SAF2205, SUPERDUPLEX SAF2507, AISI316Ti.

SEAT EPDM, NITRILE (NBR), SILICONE, VITON, GRAPHITE, FLUCAST, PTFE.

GATE AISI304L, AISI316L, 254SMO, HARDOX, AISI310, AISI904L, DUPLEX SAF2205, SUPERDUPLEX SAF2507, AISI316Ti.

PACKING SYNT+PTFE, Pure PTFE, GRAPHITE, CERAMIC, Greased COTTON.

ACTUATORS

Manual, pneumatic, hydraulic, electric, gear box, hand lever, square end, chain-wheel, pneumatic with security hand wheel, pneumatic with security gear box.

ACCESSORIES AND OPTIONS

Limit switches, proximity sensors, solenoid valves, positioner 4/20mA, sleeves, locking devices, extension, regulation v-ports, cleaning holes, bonnet, etc.