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NDL Diaphragm Valve

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NDL Diaphragm Valve

The NDL (Non Dead Leg T Valve) diaphragm valves, manually or pneumatically operated, are specially designed for use on aseptic processes in the pharmaceutical industry. The valves are widely used at points of use in the loops of purified water (PW) or water for injections (WFI).

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NDL Diaphragm Valve

Operating principle

The diaphragm provides the body seal as well as the seat seal. There are no paths to the outside environment and, as such, the valve is suitable for aseptic processes. When the valve is being closed, a pressure pad which supports the diaphragm moves towards the sealing face on the body. As the pressure plate moves, the diaphragm flexes and is forced down onto the seat area in the centre of the body, thus, closing off the flow path through the body.
The valve can be actuated either manually or pneumatically and controlled by control units and solenoid valves.
A standard diaphragm valve is used to shut the flow of a line, an NDL type valve shuts only one outlet of the main line.

Design and features

Comparing with a traditional diaphragm valve, the dead leg of an NDL valve is reduced to a minimum due to the design of the valve, and the pharmaceutical normatives like ASME BPE prioritise this condition.

Broad flexible range based upon a modular design concept with key components being common with other valves.
Autoclavable stainless steel bonnets and handles.
Handle with stroke limiter.
Hygienic design of the handles.
The valve body is machined out of a stainless steel block.
Completely drainable design.
Traceability of components.

Materials

Parts in contact with the product Stainless steel AISI 316L (1.4404)
Other stainless steel parts Stainless steel AISI 304 (1.4301)
Plastic parts PP + 30 GF
Diaphragm EPDM (according to FDA 177.2600 and USP Class VI)

Surface finish:
Internal Ra ≤ 0,5 μm
External Bright polish

Options

Diaphragm: FPM, VMQ (according to FDA 177.2600 and USP class VI) and PTFE / EPDM separate (according to FDA 177.2600).
Stainless steel bonnet with plastic or stainless steel handle.
Pneumatic actuator with stroke limiter.
Pneumatic actuator with external switch.
Control box with switches and solenoid valves.
Materials and roughness certificates.

Documents

Operating principle

The diaphragm provides the body seal as well as the seat seal. There are no paths to the outside environment and, as such, the valve is suitable for aseptic processes. When the valve is being closed, a pressure pad which supports the diaphragm moves towards the sealing face on the body. As the pressure plate moves, the diaphragm flexes and is forced down onto the seat area in the centre of the body, thus, closing off the flow path through the body.
The valve can be actuated either manually or pneumatically and controlled by control units and solenoid valves.
A standard diaphragm valve is used to shut the flow of a line, an NDL type valve shuts only one outlet of the main line.

Materials and Options

Parts in contact with the product Stainless steel AISI 316L (1.4404)
Other stainless steel parts Stainless steel AISI 304 (1.4301)
Plastic parts PP + 30 GF
Diaphragm EPDM (according to FDA 177.2600 and USP Class VI)

Surface finish:
Internal Ra ≤ 0,5 μm
External Bright polish

Diaphragm: FPM, VMQ (according to FDA 177.2600 and USP class VI) and PTFE / EPDM separate (according to FDA 177.2600).
Stainless steel bonnet with plastic or stainless steel handle.
Pneumatic actuator with stroke limiter.
Pneumatic actuator with external switch.
Control box with switches and solenoid valves.
Materials and roughness certificates.

Document № FTphNDL.3_ES
Title Válvula de Diafragma NDL
File type .pdf
Summary Las válvulas de diafragma NDL (Non Dead Leg T Valve) de accionamiento manual o neumático, están especialmente diseñadas para usos en procesos asépticos en la industria farmacéutica.
    Download
  • E-mail
Document № FTphNDL.3_EN
Title Diaphragm Valve NDL
File type .pdf
Summary The NDL (Non Dead Leg T Valve) diaphragm valves, manually or pneumatically operated, are specially designed for use on aseptic processes in the pharmaceutical industry.
    Download
  • E-mail
Document № FTphNDL.3_IT
Title Valvola a Membrana NDL
File type .pdf
Summary Le valvole a membrana NDL (Non Dead Leg T Valve) ad azionamento manuale o pneumatico, sono specialmente progettate per usi nei processi asettici nell’industria farmaceutica.
    Download
  • E-mail
Document № FTphNDL.3_DE
Title Membranventil NDL
File type .pdf
Summary Die Membranventile NDL (Non Dead Leg T Valve), manuell oder pneumatisch betätigt, sind speziell für den Einsatz in aseptischen Prozessen in der Pharmaindustrie konzipiert
    Download
  • E-mail
Document № FTphNDL.3_RU
Title Мембранный Клапан NDL
File type .pdf
Summary Мембранные клапаны NDL (Non Dead Leg T Valve), с ручным или пневматическим приводом, были специально спроектированы для асептических процессов фармацевтической промышленности.
    Download
  • E-mail
Document № 10.300.30.02ES_revB
Title INSTRUCCIONES DE INSTALACIÓN, SERVICIO Y MANTENIMIENTO VEEVALV ’09
File type .pdf
Summary Este manual de instrucciones contiene aquellas indicaciones básicas que se deberán cumplir durante la instalación, puesta en marcha y mantenimiento.
    Download
  • E-mail
Document № 10.300.30.02EN_revB
Title INSTALLATION, SERVICE AND MAINTENANCE INSTRUCTIONS VEEVALV ‘09
File type .pdf
Summary This instruction manual contains basic operations which should be fulfilled during the installation, starting and maintenance.
    Download
  • E-mail
Document № 10.300.30.02FR_revB
Title INSTRUCTIONS D’INSTALLATION, DE SERVICE ET D’ENTRETIEN VEEVALV ’09
File type .pdf
Summary Ce manuel d’instructions contient les indications de base à appliquer pendant l’installation, la mise en service et l’entretien.
    Download
  • E-mail

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