KG8

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Description

PTFE-lined lug type butterfly valve, centric design, for installation between flanges DIN EN 1092-1, PN 10/16, ANSI 150 lbs.
Two-piece body, self-centering, one-piece disc/stem, tight up to 10 bar.
DN 50 – DN 300

GEFA-MULTITOP
Automation system
Exchangeable flange for direct mounting of actuators

Approvals

 

  • Production monitored by TÜV WO/TRD 100

  • TA-Luft – Stemsealing based on the new VDI 2440 directive

  • CE safety requirements of the European pressure equipment directive PED 97/23/EC are met

  • GOST-R Certificate for the Russian Federation

  • Pressure test:

    DIN EN12266-1, P10/P11/P12-A

    DIN 3230,T3 – BA/BO-1, DIN3230,T5,T6

  • Approvals:

    Germanischer Lloyd, Lloyd´s Register of Shipping, Det Norske Veritas (DNV)

Product features

On the numbered markings you receive further information.

1. Automation

Automation system GEFA-MULTITOP
  • Standard flange acc. to DIN 3337
  • Direct actuator mounting without interruption of the stem
  • Variable and exchangeable for any actuator size
  • Actuator protection against leakage

2. Two-piece body

Standard length; highly service friendly, simple exchange of internal parts possible because of the two-piece body construction

3. Bearing

with O-ring

4. PTFE seat

in solid design (3mm), diffusion stable, lined on all sites, ensures permanent sealing at the stem gate, in the shut-off and to the flanges

5. Elastomer spring element

exactly fitted ring of silicone or EPDM behind the PTFE seat ensures flexible sealing of the shutt-off

6. PTFE-disc

solid (4mm) sintered PTFE coated stainless steel carrier PTFE-lined stem in the area of the primary seal

7. Primary seal

integrated in the seat, provides cavity-free and pressure stable sealing to the outside. Pressure is applied by the spring loaded thrust bearings.

8. Rational and safe

The cylindrical screws fix the mounting flange without transferring torques (driving torques)

9. Guarantee a free of play connection

The cylindrical screws fix the mounting flange without transferring torques (driving torques)

Product advantages

Very maintenance friendly
Easy exchange of wearing parts due to the two-piece body and therefore low maintenance costs

Excellent diffusion and corrosion resistance
due to PTFE seat-ring in solid version according to DIN 3354, lined all the way round, thus guaranteeing permanent sealing at the stem output and in the bore

Very aggressive and corrosive media are safely shut-off and controlled

Valve design cavity-free
makes simple sterile cleaning possible and choice of body material independent from the medium

Long service life
seals tightly at full differential pressure even with very high switching cycles and varying temperatures

Excellent bubble-tightness
Body lined completely with PTFE (at least 3 mm) with the seat-ring as a multi-functional sealing element, easily exchangeable, maintenance-free, with long service life

No frictional electricity (ATEX)
due to the neutral characteristic of the PTFE/PFA materials touching the product

Absolutely maintenance-free seal system
The spring-loaded pressure bearings, integrated in the seat-ring, ensure a pressure-stable sealing to the outside
the bearing with O-ring prevents foreign substances from penetrating from the outside

Independent primary and secondary seal
guarantees maximum tightness to the atmosphere according to TA-Luft requirements

Universal range of application
thanks to the absolutely cavity-free structure and the physiologically neutral characteristic of the PTFE/PFA materials touching the product, which makes its use typical in the food and pharmeceutical industries

Economic and easy assembly of all actuator types
The GEFA-MULTITOP automation system allows direct mounting of all actuators with the interface according to DIN 3337

Application range

Applications & Industries

  • Water / Sewage

  • Engineering

  • Food industry

  • Chemical and petrochemical industry

  • Colouring, Varnish, Dyeing factories

Technical data

Nominal sizes:
DN 50 – DN 300

PTFE-lined lug type butterfly valve for installation between flanges
DIN EN 1092-1, PN 10/16, ANSI 150 lbs

Two-piece body
self-centering, one-piece disc/stem

Temperature range:
-30 °C to +180 °C
depending on the seat material

Control range:
10° -90° opening angle
15° -70° opening angle linear

Bubble-tight
at full differential pressure, in dead-end service up to a differential pressure of 10 bar depending on the working temperature

Face-to-face dimension:
EN 558-1 line 20
DIN 3202-K1

Top flange:
ISO 5211 – DIN 3337
GEFA-MULTITOP Automation system

Materials

Body:

Material:

Code:

Stainless steel 1.4301/1.4308

63

Stainless steel 1.4571/1.4408

66

Grey cast iron GG 25

22

Grey cast iron, Gotekplast-coated

72

Ductile iron GGG 40.3

24

Cast steel GS-C25

44

   

Disc:

Material:

Code:

Alloy C

93

Alloy C 22

92

Stainless steel 1.4581/1.4408

66

Stainless steel, polished

31

PTFE-lined

77

Titanium

94

   

Seat ring:

Material:

Code:

PTFE

T

PTFE / carbon

TK

UHMWPE

U

 

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