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Pneumatic metal butterfly valve

GEMÜ 491 Edessa

ConfigureTechnical data sheet
Pneumatically controlled shut-off valve with PTFE lining, stainless steel valve disc, and flange connection – ideal for the chemical, pharmaceutical, and food industries.

PTFE-sealing, centrally mounted butterfly valve

Product information

The GEMÜ 491 Edessa PTFE lined butterfly valve has a metal actuator and is pneumatically operated. The "Normally Closed", "Normally Open" and "Double Acting" control functions are available. Disc and shaft are one piece, body and liner are available in different designs. The butterfly valve is available in nominal sizes DN 25 Up to 600 and in standard installation lengths ISO 5752/20 | EN 558-1/20 | API 609 category A (DIN 3202 K1) in wafer and lug body versions.

Key features

  • Suitable for chemically corrosive media
  • Bubble tight sealing acc. to EN 12266-1/P12, leakage rate A
  • High-quality selection of materials can be combined in different ways
  • High level of plant reliability thanks to one-piece shaft and spring-washer-supported seal system
  • Long service life thanks to shaft bearings and special disc and liner geometry
  • Optional accessories are installed, set and tested so they are ready for operation
Pneumatically controlled shut-off valve with PTFE lining, stainless steel valve disc, and flange connection – ideal for the chemical, pharmaceutical, and food industries.

Technical details

Parameters
Value
Media temperature
-20 to 200 °C
Ambient temperature
-20 Up to 95 °C
Operating pressure
0 Up to 10 bar
Nominal sizes
DN 25 to 600
Housing configurations
Lug
Wafer
Connection standards
AS
ASME
DIN
EN
ISO
JIS
Body materials
1.4404, block material
EN-GJS-400-18-LT (GGG 40.3)
S355J2 + N, cast steel material
VE Duroplast, reinforced
Body coating
Epoxy
Liner materials
PTFE/EPDM
PTFE/FKM
PTFE/silicone
Disc materials
1.4404 (316L), forged material
1.4469, Duplex cast steel material
2.4602 (alloy 22), block material
3.7035, titan
Disc coating
PFA
Conformities
ATEX
EAC
FDA
FMEDA
TA Luft (German Clean Air Act)

Downloads

40 Results
  • Produktzertifikat ATEX_491_498_Y

    pdf (669 KB) -
    DE

  • Datenblatt GEMÜ 490, 491, 497, 498

    pdf (2 MB) -
    DE

  • bs_a_IND_13_mining_industry_pt

    pdf (2 MB) -
    PT

  • bs_a_IND_03_sludge-drying-and-vapour-condensation_en

    pdf (634 KB) -
    EN

  • Product certificate RoHS - GEMÜ product collection

    pdf (450 KB) -
    DE/EN

  • Produktbroschüre Für hohe chemische Anforderungen Baureihe 490 Edessa

    pdf (606 KB) -
    DE

  • 02_Data_2021_01
    ValveSizer
    Version: 01.2021
    Interface: -
    Date: 2020-12-31T23:00:00Z

    zip (1 MB)

  • bs_a_IND_13_mining_industry_en

    pdf (2 MB) -
    EN

  • Käyttöohje GEMÜ 490, 491, 497, 498

    pdf (973 KB) -
    FI

  • Product brochure For aggressive chemical applications 490 Edessa series

    pdf (606 KB) -
    EN

  • Fiche technique GEMÜ 490, 491, 497, 498

    pdf (2 MB) -
    FR

  • z_Data_2019_02
    ValveSizer
    Version: 02.2019
    Interface: -
    Date: 2019-01-31T23:00:00Z

    zip (1 MB)

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