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

Knife Gate Valve - T200 - LUG | Zubi

Zubi T200 Lug Knife Gate Valve

The Zubi T200 Lug is a full bore isolation knife gate valve with a monoblock body and internal guides for the blade. The primary configuration is unidirectional: full pressure is applied towards the seat, while in reverse operation, the allowable pressure is limited to approximately 1/3 of the nominal.

Operating Areas

  • Sizes: DN50–DN1200
  • Operating Pressure: DN50–DN250 10 bar, DN300–DN450 6 bar, DN500–DN600 4 bar, DN700–DN1200 2 bar
  • Media: water, wastewater, dilute slurries, liquids with solids up to approximately 5%
  • Testing: UNE-EN 12266-1
  • Flanges: EN1092 PN10/16, with other drillings available upon request

Industrial Applications

Used in water and wastewater treatment plants, chemical facilities, mining, pulp, biomass, bulk handling, and auxiliary circuits in power generation plants. Not selected as a throttling valve, but as an on/off isolation in lines where suspended solids would cause issues in conventional valves.

Materials and Sealing

The body is available in GG25, GGG40/50, CF8, CF8M, 904L, Duplex, and Superduplex. The blade can be AISI304L, AISI316L, or a special alloy. Seats in EPDM, NBR, Viton, Silicone, PTFE, RPTFE, Graphite, or Flucast are selected based on chemical compatibility, temperature, and required tightness. Packing: Synt+PTFE, PTFE, or graphite.

Actuation and Instruments

Available with handwheel, lever, gearbox, chain wheel, single or double-acting pneumatic cylinder, electric or hydraulic actuator. For pneumatic operation, 5–6 bar dry and filtered air is recommended. Optional: limit switches, proximity switches, solenoid valves, positioner 4–20 mA, locking device, and stem extension.

Maintenance

Flange alignment is critical. Body deformation increases operating torque and affects sealing. After line pressure, check the gland; excessive tightening reduces packing lifespan.

Datasheet and documents

Description

Main Features

  • Cast body of one integral piece with internal guides to support the knife.
  • Provides high flow rates with low pressure drop.
  • Recommended for water with maximum solid concentration of 5%.
  • Polished gate with rounded edges prolongs the working life of the rings and packing.
  • Short FTF dimensions as per manufacturer standard. Other standards such as DIN3202 K1 and MSS-SP-81 under demand.
  • Ideal as end of line valve.

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.