Knife Gate Valve - T400 - SILO TYPE | Zubi | Philippopoulos s.a.
Knife Gate Valve - T400 - SILO TYPE | Zubi | Philippopoulos s.a.

Knife Gate Valve - T400 - SILO TYPE | Zubi

Knife Gate Valve Zubi T400 Silo Type

The Zubi T400 is a knife gate valve wafer, unidirectional, monoblock, designed for silo discharge, hopper outlets, and bulk handling lines with powders or granular solids. It is not intended for precise flow regulation; its primary function is isolation or controlled discharge of solid materials.

Operating Principle

The valve is typically installed in reverse position, with the seat facing the upstream side, to reduce material buildup in the body, seat wear, and closing difficulty. The body features 4 flushing holes as standard, for cleaning internal residues and preventing solid entrapment. Installation direction is indicated by an arrow on the body.

Pressure, Sizes, and Connections

  • Dimensions: DN100–DN600
  • DN100–DN250: 3 bar
  • DN300–DN400: 2 bar
  • DN500–DN600: 1 bar / 1.5 bar depending on technical version
  • Flanges: EN1092 PN10/16, ANSI B16.5 or ANSI 125/150, JIS 5K/10K, AS-2129 D/E
  • Testing: UNE-EN 12266-1

Applications

Typical use in:

  • cement and mortar silos,
  • biomass,
  • mining and mineral materials,
  • chemical powders,
  • bulk handling,
  • power plants and cement plants.

Materials and Sealing

Body: GG25/GJL250, GGG40, A216 WCB, CF8, CF8M, CF3M, 254SMO, 904L, Duplex SAF2205, Superduplex SAF2507.
Blade: AISI304L, AISI316L, Hardox or special alloys.
Seat: EPDM, NBR, Silicone, Viton, PTFE, RPTFE, Graphite or Flucast.
Packing: Synt+PTFE, pure PTFE, Graphite, Ceramic or greased cotton.

Actuation

Available with handwheel, gearbox, chain wheel, pneumatic cylinder, electric or hydraulic actuator. Optional: limit switches, inductive sensors, solenoid valves, positioner 4–20 mA, locking device, extension, and bonnet.

Datasheet and documents

Description

Main Features

  • The special design of the body allows for easy passage of the fluid and makes it ideal for use as silo discharge valve.
  • The valve is normally installed in the reverse position (seat upstream OFF seat) in order to avoid problems like solid accumulation, seat wear, difficult closing…
  • Flushing holes (x4) integrated on the body as standard. These purge port allow internal cleaning of the valve and avoid solids trapping.
  • Directional arrow in the body showing correct mounting position.

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

  • DN100 to DN250: 3 bar
  • DN300 to DN400: 2 bar
  • DN500 to DN600: 1,5 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.