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

Knife Gate Valve - T200 - BIDIRECTIONAL | Zubi

Zubi T200 Bidirectional Knife Gate Valve

The Zubi T200 Bidirectional is a knife gate isolation valve featuring a monoblock cast body, internal knife guides, and wedges on both sides, allowing it to operate with equal differential pressure in both directions. It is selected when pressure direction may reverse or when line section isolation is required from either side.

Operating Ranges

  • DN50–DN250: 10 bar
  • DN300–DN450: 6 bar
  • DN500–DN600: 4 bar
  • DN700–DN1600: 2 bar
  • Flange Connections: PN6/10/16/25/40, ANSI 125/150, JIS 5K/10K, AS-2129 D/E
  • Standards: 2006/42/CE, 2014/68/EU PED, 2014/34/EU ATEX Area 2 & 22

Fluids and Applications

Suitable for water and industrial fluids with suspended solids up to approximately 5%. Typical applications include water/wastewater facilities, pulp, chemical industry, mining, power plants, biomass, and bulk handling. The full bore design reduces pressure drop, while the body geometry limits solid accumulation in the seat area.

Materials and Sealing

Body: GG25, GGG40, WCB, CF8, CF8M, CF3M, 904L, Duplex, Superduplex, 254SMO.
Knife: AISI304L, AISI316L, Hardox or special alloys.
Seats: EPDM, NBR, Silicone, Viton/FKM, Graphite, Flucast, PTFE.
Packing: Synt+PTFE, PTFE, Graphite, Ceramic or greased cotton. Selection is based on temperature, pH, corrosiveness, solids, and required tightness.

Actuation and Instruments

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

Maintenance

Installation requires clean, parallel flanges and cross-tightening. The gland is adjusted only as needed to stop leakage; excessive tightening increases torque and reduces packing lifespan.

Datasheet and documents

Description

Main Features

  • Cast body of one integral piece with internal guides to support the knife and with wedges on both sides to work with fluids in both directions with the same pressure.
  • Provides high flow rates with low pressure drop.
  • The internal design of the body avoids any build-up of solids in the seat area.
  • During the working time of the valve, the knife is in contact with the joints.
  • Recommended for water with maximum solid concentration of 5%.
  • Two directional arrows in the body show the correct mounting position.
  • 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.