Page 293 - Peter Paul 2019 Catalog

SEAL MATERIAL
Food-Grade Valve Applications
Vending Machines
NSF criteria C-2 covers sanitation requirements for equipment and devices used in storing, preparing or handling foods and beverages. EPDM and Santoprene® are materials that meets the FDA requirements for non- metallic material that comes in contact with food–type media. Fluorel®
is used where higher temperatures exist.
Swell-Resistant Printers Gum Seals
We have an elastomer with customized nitrile rubber and unique for use of water-based printing inks. We are supplying this in conventional plungers and disk compensated plungers and media isolation diaphragms for ink dispensing and retrieval system, some in high-speed ink jet printers.
Normal elastomers and printer inks can sometimes combine and swell causing the lettering and logo to become distorted. This special elastomer molds well in existing tooling and is economical, performing well for the water-based inks. This product is available in Series 50 and 20 sizes in the diaphragm media isolation valves.
Solenoid Valves for Low Temperature
Applications
Our solenoid valves are also widely employed at low temperatures to
-40°C involving gaseous and liquid compounds including refrigerants and liquid nitrogen. For these uses, the full range of our 2-way and 3-way valves can be specified with the Teflon or Kel-F seals required for processing semi corrosives; typically all valves must be cleaned for oxygen service to remove oil and other surface contaminants. In many applications a compressed liquid is metered by the valve. Many of the valves will be UL recognized
and CSA listed.
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