Diaphragm valve - T99 | Zubi | Philippopoulos s.a.
Diaphragm valve - T99 | Zubi | Philippopoulos s.a.

Diaphragm valve - T99 | Zubi

Zubi T99 Weir Type Diaphragm Valve

The Zubi T99 is a threaded weir type diaphragm valve, bidirectional, featuring a one-piece cast body and bolted bonnet. The weir geometry is primarily intended for flow isolation in clean or moderately loaded fluids, offering a shorter diaphragm stroke compared to straight-through types. It lacks an internal elastomeric lining option, so chemical compatibility is mainly determined by the body and diaphragm materials.

Technical Specifications

  • Sizes: DN15 to DN80.
  • Connections: BSP or NPT, with other connections available upon request.
  • Manual version pressure: up to 10 bar.
  • Body: GGG50 or CF8M / AISI 316.
  • Bonnet: GG25.
  • Sealing: watertight shut-off.
  • Compliance: Machinery Directive 2006/42/CE, PED 2014/68/EU Fluid Group 1(b), 2 Cat. I Mod. A, and ATEX 2014/34/EU Area 2 & 22.

Diaphragms and Material Selection

Available diaphragms: Butyl, aliment butyl, reinforced butyl, Natural Rubber, aliment natural rubber, EPDM, Hypalon, Neoprene, Nitrile, Silicone, PTFE, and Viton. Selection is based on pH, temperature, oxidizing nature, solids content, and handling frequency. For corrosive fluids, CF8M/AISI 316 is typically considered, while GGG50 may be used for neutral waters or auxiliary networks.

Applications

Suitable for:

  • water and wastewater treatment,
  • chemical auxiliary circuits,
  • pulp & paper,
  • power generation,
  • mining and bulk handling with limited abrasiveness,
  • food/beverages only after material and hygiene requirements confirmation.

Handling and Automation

Available with handwheel, pneumatic actuator air open, air close, or double acting, electric actuator, and gearbox. Options: position indicators, limit switches, solenoid valves, padlocks, mechanical stops, and positioner 4–20 mA.

Difference from T85/99

The T99 is a weir type and preferred in threaded on/off lines with better diaphragm compression. The T85/99 is straight-through and preferred when freer passage or less solids retention is required.

Standard (Options)
  • DIN
Connection (Options)
  • BSP
  • NPT
Material (Options)
  • EN-GJS-500
  • AISI 316 (Stainless Steel)
Pressure Rating (Options)
  • PN 10

Description

Main Features

  • Monoblock body, one piece cast.
  • 100% leak tightness performance guaranteed.
  • The valve can be installed in any position.
  • High strength woven Diaphragm reinforced design.
  • Bolted bonnet design.
  • Easy maintenance: Three part design (Body, diaphragm and actuator) allows maintenance and actuator retrofitting without removing the valve body from the pipeline.
  • Bidirectional shut off design.

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

  • Thread NPT
  • Thread BSP

*Other connections on request

SIZES & PRESSURES

  • Manual valves:
  • DN15 to DN80: 10 bar

For actuated valves, please refer to the appropriate datasheets.

TIGHTNESS

  • Watertight

MATERIALS

BODY  GGG50, CF8M (AISI316) Others on request.

DIAPHRAGM 

  • Butyl (BU) Blue
  • Aliment butyl (BUA)
  • Reinforced butyl (BUR)
  • Natural rubber (BL) White
  • Natural aliment rubber (BLA)
  • EPDM (EP)
  • Hypalon (HY) Green
  • Neoprene (NE) Red
  • Nitrile (NI) Yellow
  • Silicone (SI)
  • PTFE (TE)
  • Viton (VI) Orange

*The abbreviations or the identification colours are in the flap of the diaphragm. *The pneumatic actuator diaphragm made in Natural rubber (BL).

BONNET GG25 Others on request.

ACTUATORS

Manual, air open actuator, air to close actuator, double acting actuator, electric, gear box.

ACCESSORIES AND OPTIONS

Position indicators, switches, solenoid valves, padlocks, mechanical limit switches, positioner 4/20mA.