Sanitary Valves And Fittings
Sanitary Butterfly Valve
Manual or pneumatic butterfly valves DN15 to DN200 in SS304 or SS316L.
View specifications →Sanitary Valves And Fittings
Sanitary Diaphragm Valve
A flexible diaphragm separates the product from the stem and bonnet, which is why these valves are specified on sterile and aggressive duty.
Overview
What This Pump Does
Sanitary diaphragm valves in SS304 or SS316L, models SK-GV001 and SK-GV002, with manual handwheel or pneumatic actuator. The diaphragm seals the flow path from the operating mechanism, so there is no stem passing into the product.
Sizes run DN15 to DN200 with weld, clamp or threaded connections to DIN, SMS, 3A, ISO and IDF, polished to Ra below 0.4 um, with working pressure to 1.0 MPa and a temperature band of minus 5 to 95 degrees Celsius.
| Finish | Mirror or Matt Polish; Ra<0.5um |
|---|---|
| Standard | DIN, SMS, 3A, ISO, IDF |
| Connection Type | Weld, Clamp |
| Polish | Mirror Polish Ra<0.5um |
| Max. Working pressure | 1.0 MPa (10 bar) |
| Min.Working pressure | Vacuum |
Key Benefits
What The Diaphragm Buys You
No Stem In The Product
The diaphragm isolates the operating parts, which removes the leak path and the crevice a stem creates.
Sterile Duty
Widely specified in pharmaceutical and biotechnology lines for exactly that reason.
Simple Maintenance
The diaphragm is a replaceable element, so servicing is a planned change rather than a valve replacement.
Manual Or Actuated
Handwheel or pneumatic actuator on the same body.
Application Scenarios
Where It Is Installed
Pharmaceutical Lines
Sterile and purified water duty where crevice free construction is required.
Aggressive Products
Media that would attack a conventional stem seal.
Sampling And Point Of Use
Small valves where tight shut off and clean geometry matter more than pressure drop.
Who It Is For
- Pharmaceutical and biotech manufacturers
- Food producers with sterile requirements
- Fine chemical plants
- Skid builders on regulated projects
Problems It Solves
Stem seals leak and trap product
A diaphragm removes the stem from the flow path entirely.
Cleaning cannot reach the mechanism
With the mechanism outside the wetted area there is nothing for cleaning solution to have to reach.
Frequent valve replacement
Replacing the diaphragm restores the valve rather than scrapping it.
Technical Features
How It Is Built
- Models SK-GV001 and SK-GV002
- Diaphragm isolates the operating mechanism from the product
- SS304 or SS316L body
- Size DN15 to DN200
- Mirror or matt polish, Ra below 0.4 um
- Manual handwheel or pneumatic actuator
Specifications
Technical Data
Published valve data. Diaphragm material is chosen for the product, the temperature and the cleaning cycle.
| Finish | Mirror or Matt Polish; Ra<0.5um |
|---|---|
| Standard | DIN, SMS, 3A, ISO, IDF |
| Connection Type | Weld, Clamp |
| Polish | Mirror Polish Ra<0.5um |
| Max. Working pressure | 1.0 MPa (10 bar) |
| Min.Working pressure | Vacuum |
| Working Temperature | -5 to 95 degrees Celsius |
| Other Parts | Adopt |
| Application | Dairy, beer, food, beverage, pharmacy, biotechnology, etc |
| Working principle | manual operation or driving device operation |
| Operation | Manual or pneumatic |
Materials And Process
What Goes Into Every Unit
Materials
- SS304 or SS316L body
- EPDM, silicone or fluoroelastomer diaphragm
- Polished wetted surfaces
Manufacturing And Assembly
- Body machining and polishing
- Diaphragm and bonnet assembly
- Leak testing before dispatch
- Documentation with the order
Quality Control
- Seat and diaphragm leak tested
- Surface finish verified
- Documentation issued with the order
Customization Options
- Manual or pneumatic operation
- Diaphragm material
- Connection type and standard
- Body material SS304 or SS316L
Compared With Other Options
| Sanitary butterfly valve | A butterfly valve is cheaper and has lower pressure drop. A diaphragm valve suits sterile duty and aggressive media. |
|---|---|
| Ball valve | A ball valve has a cavity around the ball. A diaphragm valve has no such trap in the flow path. |
Use Guide
Getting Long Life From A Diaphragm Valve
Match The Diaphragm
Select the diaphragm compound against product, temperature and cleaning chemistry together.
Do Not Overtighten
Closing force is set by the design. Overtightening shortens diaphragm life sharply.
Install With Correct Orientation
Mount so the valve drains, which matters in sterile lines.
Replace On Schedule
Change diaphragms at planned intervals, keeping a spare set on site.
Answers
Sanitary Diaphragm Valve FAQ
Why choose a diaphragm valve?
Because the diaphragm keeps the stem and bonnet out of the product, which suits sterile duty and aggressive media.
Which sizes are available?
DN15 to DN200 with weld, clamp or threaded connections.
Is a pneumatic version available?
Yes, manual handwheel and pneumatic actuator versions are both supplied.
What is the pressure rating?
Up to 1.0 MPa, which is 10 bar, with vacuum on the low side.
How often should the diaphragm be changed?
On a planned interval set from your duty. Steam sterilisation and hot caustic shorten life, so log the changes.
Related Equipment
Related Equipment From The Same Line
Other valves and fittings for hygienic lines.
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View specifications →Need Sanitary Diaphragm Valve Sized For Your Duty Point
Send the product, the temperature and the cleaning cycle and we will confirm the diaphragm material.