Diaphragm valve - T85/99 | Zubi | Philippopoulos s.a.
Diaphragm valve - T85/99 | Zubi | Philippopoulos s.a.

Diaphragm valve - T85/99 | Zubi

Diaphragm Valve Zubi T85/99

The Zubi T85/99 is a straight-through diaphragm valve with threaded connections, featuring a monoblock cast body and bolted bonnet. It is bidirectional and primarily used as an isolation valve in industrial liquid networks, where diaphragm replacement is required without removing the body from the pipeline. This type does not accommodate an elastomeric lining, a critical factor for selection in corrosive or abrasive media.

Technical Specifications

  • Connections: BSP / GAS or NPT, with other connections available upon request.
  • Sizes: DN20–DN65.
  • Manual version pressure: 8 bar for DN20–DN50, 6 bar for DN65.
  • Pneumatic version pressure: 7 bar for DN20–DN50, 5 bar for DN65.
  • Body materials: GGG50 or CF8M / AISI 316, depending on the version.
  • Bonnet: GG25.
  • Standards: PED 2014/68/EU, Machinery Directive 2006/42/CE, ATEX 2014/34/EU for Area 2 & 22.

Diaphragms and Media Compatibility

Available diaphragms: Butyl, reinforced Butyl, Natural Rubber, EPDM, Hypalon, Neoprene, Nitrile, Silicone, and Viton. Selection is based on pH, temperature, chemical compatibility, presence of solids, and frequency of operations. For corrosive media, CF8M body is preferred, while GGG50 can be considered for water/wastewater networks if the medium is compatible.

Applications

Suitable for:

  • water and wastewater treatment,
  • chemical auxiliary circuits,
  • pulp and paper industry,
  • mining and general industrial supplies,
  • food and beverages, only with appropriate diaphragm and compatibility confirmation.

Handling and Automation

Available with handwheel, pneumatic actuator air-to-open, air-to-close, or double acting, electric actuator, and gearbox. Automation options: position indicators, limit switches, solenoid valves, padlock, and positioner 4–20 mA.

FAQ

When is the T85/99 chosen over the flanged T85?
When the line is threaded and the DN/pressures remain within the type's limits.

Is it suitable for abrasive slurry?
Only after checking speed, solids, and body material, as the T85/99 lacks body lining.

Standard (Options)
  • DIN
Connection (Options)
  • BSP
  • NPT
Material (Options)
  • EN-GJS-500
  • AISI 316 (Stainless Steel)
Pressure Rating (Options)
  • PN 6
  • PN 8

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:
  • DN20 to DN50: 8 bar
  • DN65: 6 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)
  • 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.