Knife Gate Valve - T200 - TAPPI (MSS SP-81) | Zubi | Philippopoulos s.a.
Knife Gate Valve - T200 - TAPPI (MSS SP-81) | Zubi | Philippopoulos s.a.

Knife Gate Valve - T200 - TAPPI (MSS SP-81) | Zubi

Knife Gate Valve Zubi T200 TAPPI / MSS-SP-81

The Zubi T200 TAPPI is a full bore lugged knife gate valve with a monoblock body, designed for flow isolation in lines with suspended solids, slurries, and viscous fluids. Available in unidirectional or bidirectional configurations; pressure direction is indicated by an arrow on the body. Sizes range from DN50 to DN600, with an operating pressure of 10 bar.

Applications and Media

Suitable for:

  • pulp and TAPPI circuits,
  • water and wastewater treatment,
  • chemical industry,
  • mining, biomass, and bulk handling,
  • sludges, slurries, and liquids with solids.

The internal design limits solid accumulation in the seating area, while the polished knife reduces wear on the seat and packing.

Standards, Connections, Materials

  • Face-to-face and pressure rating: MSS-SP-81 / TAPPI TIS 405-8.
  • Flanges: EN1092 PN10/16, ANSI B16.5, PN6–PN40, JIS, AS-2129 upon request.
  • Testing: UNE-EN 12266-1.
  • Directives: 2006/42/EC, 2014/68/EU PED, ATEX 2014/34/EU report available.

Seats, Sealing, and Selection

Body: GG25, GGG40, WCB, CF8, CF8M, 316L, Duplex, Superduplex, 904L, and other materials.
Seat: EPDM, NBR, Viton/FKM, Silicone, PTFE, RPTFE, Graphite, Flucast.
Packing: Synt+PTFE, pure PTFE, Graphite, Ceramic, or greased cotton. Selection is based on chemical compatibility, temperature, solid content, and required leakage.

Actuation and Instruments

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

Maintenance

Installation requires clean and parallel flanges, proper alignment, and gradual cross-tightening. After line pressure, check the packing gland; 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 DN600: 10 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.