GEMU 658 Diaphragm Valve Two Stage Actuator, Metal on Gemu Valves Gemu Valves - GEMU 658 Diaphragm Valve Two Stage Actuator, Metal
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All Categories > Industrial Diaphragm Valves > Two Stage Actuator Metal Diaphragm Valves > GEMU 658 Diaphragm Valve Two Stage Actuator, Metal 

GEMU 658 Diaphragm Valve Two Stage Actuator, Metal
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Nominal size 3/4” with stainless steel actuator, two stage actuation for end of cycle flow reduction 3/8”- 3/4” connections

Standard Features
  • External mechanical adjustment 0-100%
  • Stainless steel actuator
  • Compact low maintenance design
  • Fail closed function only
  • EHEDG certified sealing concept
  • Second generation PTFE or EPDM diaphragms
  • 316L stainless steel valve body
  • Integral buttweld tube extensions or triclamp
Available Options
  • Stroke limiter (adjustable travel stop open)
  • Electrical position indicators
Special connections
-  VCR®, hose barb, welded extensions (tube or pipe),
-   ISO, DIN and other international standards

Fabrications
Cluster valve assemblies, Zero Static T-valves, Duplex, Multiported, Tank Bottom/Side Sampling,  and Custom Multiported block valves upon request.

Materials
AL-6XN® , Hastelloy® , and others available upon request.

Typical Applications
  • Pharmaceutical manufacturing
  • Bioprocessing
  • Cosmetic
  • Brewery Service
  • Food and Beverage
  • Semiconductor
  • High Purity Chemicals


GEMU 658, 688 Diaphragm Valve, Metal

larger image

Actuator Dimensions

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Specifications · Working Medium · Control Medium · Note

Specifications

Type

Type 658 pneumatic, SS Two Stage actuator for Filling applications, SS Sanitary internals, Visual Indicator

Nominal Size

1/2"
3/4"
3/8"

Body Configuration

Standard
Standard 2-Way
Tank Bottom

Connection

Butt-Weld
Butt-Weld Extension
Clamp x Butt-Weld
Clamp x Butt-Weld Extension
Clamp x Clamp

Body Material

316L Stainless Steel

Diaphragm Material

EPDM Diaphragm, Code 17, EPDM Diaphragm Compliant to USP Class VI, Chapter <87>, <88> and 21 CFR 177.2600,
EPDM Diaphragm, Code 3A, EPDM Diaphragm Compliant to USP Class VI, Chapter <87>, <88> and 21 CFR 177.2600,
EPDM Diaphragm, Code 6A, EPDM Diaphragm Compliant to USP Class VI, Chapter <87>, <88> and 21 CFR 177.2600,
TFM / EPDM Laminated, Code 5A, TFM / EPDM Diaphragm Compliant to USP Class VI, Chapter <87>, <88> and 21 CFR 177.1550,

Control Function

Pneumatic Air to Air,
Pneumatic Normally Closed,
Pneumatic Normally Open,

Design

Diaphragm size 10
Diaphragm size 25
Diaphragm size 40+50

Surface Finish1

15µ-in max EP SFV4
20µ-in max SFV1
20µ-in max EP SFV5
25µ-in max SFV2
25µ-in max EP SFV6
30µ-in max SFV3
35µ-in avg
35µ-in avg EP
1 Ra acc. to DIN 4768; at defined reference points


Working Medium

Working Medium1

Corrosive, inert, liquid and gaseous media which have no negative impact on the physical and chemical properties of the body and diaphragm material.

Working Temperature2

Max. 150 ºC
1 Depending on medium wetted materials.
2 Depending on the application.


Control Medium

Control Medium

Inert Gases

Max. Perm. Temperature of Control Medium

60 ºC

Note
The valve will seal against flow in either direction up to full working pressure (gauge pressure).


 MORE IMAGES 

· Application Example

 DOWNLOADS 

width= 658, 688 Data sheet
(PDF)

width= Stroke Limiters, Seal Adjusters, Optical Position Indicators, and Manual Overrides
(PDF)
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