Select branch and language

Select language

Personal AI assistant

Do you have any questions? Start a conversation.

Internal sales

For all sales-related matters:

Tel: +49 7940 123 8509

Send an enquiry

Service helpline

For all after-sales matters:

Tel: +49 7940 123 450

Contact the helpline

Electromotive 2/2-way diaphragm valve with metal body

GEMÜ 638

ConfigureTechnical data sheet
Electrically operated diaphragm valve with flange connection and handwheel – ideal for the chemical industry, water treatment, and process automation.

High-flow deep-seated diaphragm valve with AUMA actuator

Product information

The GEMÜ 638 2/2-way diaphragm valve has AUMA motor and control units and is motorized. The valve body is a full bore design.

Key features

  • High mechanical stability
  • High flow rate due to straight through flow
  • Optional flow direction
  • Valve can be cleaned without disassembly of actuator
  • Proven motorized actuators and control units in modular design
Electrically operated diaphragm valve with flange connection and handwheel – ideal for the chemical industry, water treatment, and process automation.

Technical details

Parameters
Value
Media temperature
0 Up to 100 °C
Ambient temperature
0 Up to 50 °C
Operating pressure
0 Up to 7 bar
Nominal sizes
DN 25 Up to 150
Connection types
Flange
Body materials
EN-GJL-250, cast iron material
EN-GJL-250, cast iron material with hard rubber lining
EN-GJL-250, cast iron material with soft rubber lining
Conformities
EAC

Downloads

9 Results
  • Datenblatt GEMÜ 638

    pdf (1 MB) -
    DE

  • Product certificate RoHS - GEMÜ product collection

    pdf (450 KB) -
    DE/EN

  • Certificat du produit machinery - GEMÜ product collection

    pdf (341 KB) -
    FR

  • Produktzertifikat machinery - GEMÜ product collection

    pdf (315 KB) -
    DE

  • Herstellererklaerung-Verordnung-EU-2024-590-de-2026-02-25

    pdf (84 KB) -
    DE

  • Fiche technique GEMÜ 638

    pdf (1 MB) -
    FR

  • Betriebsanleitung / Operating instructions GEMÜ 638

    pdf (1 MB) -
    DE/EN

  • Data sheet GEMÜ 638

    pdf (1 MB) -
    EN

  • Manufacturers-Declaration-Regulation-EU-2024-590-gb-2026-02-24

    pdf (39 KB) -
    EN

Suitable services

  • Expert knowledge
    for your applications

    Training

    Deepen your expertise in valve technology and plant control. Our training courses provide practical content to help you design processes that are safe, efficient, and compliant with standards.

  • Ensure longevity
    and reliability

    Maintenance

    Regular maintenance ensures consistently stable processes. Our service teams ensure the availability of your systems and reliably extend the service life of your components.

  • Fast, efficient and
    precise in operation

    Repair

    When it comes to repairs, every minute counts. Our experts analyze, repair, and test reliably - using original spare parts, technical precision, and a focus on minimizing downtime.

  • Intelligent networking with GEMÜ CONEXO

    Digital support

    CONEXO makes maintenance digital: RFID technology and mobile apps enable the unique identification of your components and document maintenance processes transparently.