Parker’s push-to-connect fittings line has seen some changes over the years including part numbering system modifications, new product additions, as well as combining various part series'. The last big change took place in January 2012. Engineers and maintenance managers are still wondering what push-to-connect fittings are available, and which particular Parker push-to-connect fitting best fits their application. Below is the short summary. For more detail, read our original post.
Parker PLII fittings (Parker Prestolok II) Replaced by PLP
Parker PLII Prestolok fittings are replaced by the more compact Prestolok PLP line. Here are the differences:PLII vs. PLP
- PLP fittings are more compact than PLII
- PLP fittings offer 14 more configurations than PLII line
- PLP cost about 10% to 25% less than their PLII counterparts, depending on configuration
- PLP part numbering nomenclature is consistent from inch to metric sizes
- Part numbering nomenclature - inch
- PLII: 364PL-4
- PLP: 364PLP-4
- Part numbering nomenclature - metric
- PLII: JPK-6
- PLP: 364PLP-6M
- PLP offers higher pressure rating
- PLII: 150 PSI
- PLP: 290 PSI
- Operating temperature range is virtually the same
- PLII: 0°F – 150°F
- PLP: -4°F – 150°F
Parker’s Push-To-Connect Fittings Selection (as of January 2012):
- PLP – Parker brass or composite push-to-connect fittings for general industrial applications
- PLM – Parker electroless nickel-plated brass push-to-connect fittings for cost-effective wash-down applications
- PLS – Parker stainless steel push-to-connect fittings for caustic wash-down applications
- TrueSeal – Acetal, Polypropylene and Kylar fittings for potable water applications
- Liquifit – Second generation potable water fittings ideal for beverage applications
- GS – Parker’s economical push-to-connect fittings for global markets
