Knife Gate Valve - T700 | Zubi | Philippopoulos s.a.
Knife Gate Valve - T700 | Zubi | Philippopoulos s.a.

Knife Gate Valve - T700 | Zubi

Knife Gate Valve Zubi T700

The Zubi T700 is a bidirectional knife gate valve, full bore, with a monoblock body. It is primarily used for clean fluids or fluids with a small amount of suspended solids, where tight isolation is required in both flow directions. Available in wafer and lug designs.

Operating Limits and Connections

  • Range: DN50–DN250, pressure 10 kg/cm² / 10 bar.
  • Additional: DN300: 6 bar.
  • Flanges: PN6/10/16/25/40, ANSI 125/150, BST D/E, JIS 5K/10K, AS-2129 D/E.
  • Testing: UNE-EN 12266-1.
  • Directives: 2006/42/EC Machinery, 2014/68/EU PED, ATEX upon application review.

Sealing Design

The T700 employs a perimeter elastic seat U-profile with internal metal reinforcement. The blade is polished on both sides to reduce seat and packing wear. Internal guides support the blade throughout its travel and act as cleaning surfaces during movement.

Materials

  • Body: GG25 / GGG40
  • Seat: EPDM, NBR, Viton, Natural Rubber
  • Blade: AISI304L, AISI316L, 254SMO, Hardox, AISI310, 904L, Duplex, Superduplex, AISI316Ti
  • Packing: Synt+PTFE, PTFE, Graphite, Ceramic, greased cotton

Applications

Typical uses: water and wastewater, power plants, chemical industry, mining, biomass, pulp, and bulk handling. For highly abrasive slurry or high solid concentration, other series like sleeve-type slurry valves are usually considered.

Actuation and Maintenance

Available with handwheel, lever, gearbox, chain wheel, pneumatic, hydraulic, and electric actuators. For pneumatic operation, 5–6 bar dry, filtered, and lubricated air is recommended. The electric actuator is recommended at 45 rpm.

Installation requires parallel flanges, clean bore, and cross-tightening. The gland is adjusted only as needed to stop leakage, as over-tightening increases operating force and reduces packing life.

Datasheet and documents

Description

Main Features

  • Special seal housing and design avoiding any build-up.
  • U-profile perimeter resilient seat with internal reinforced steel core to increase durability.
  • Stainless steel both sides polished gate to avoid seat damage and lengthening packing durability.
  • Internal gate guides provide support through the entire range of travel eliminating both lateral movement and deflection. Additionally, they scrape & clean the knife so no fluid can reach the surrounding environment.

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: 6 bar

(Higher design pressures on request)

TIGHTNESS

  • Watertight

MATERIALS

BODY  GG25, GGG40

SEAT EPDM, NITRILE (NBR), VITON, NATURAL RUBBER. 

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, locking devices, extension, etc.