​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Chesterton 1725A Food Process Packing is constructed with expanded PTFE yarn and a specially-designed lubricant to provide superior sealing capability in rotating equipment. Its interbraid construction ensures maximum strength as well as minimal wicking of fluid through the packing. 
Chesterton 1725A complies with the USDA requirements for minimal food contact and FDA specification 21 CFR, 178.3297, 177.2800, and 177.1550. ​This packing has been approved by NSF International; it meets the requirements of Standard 61 for use in potable drinking water systems, as well as the ACS Certification​ for drinking water.
1725A is applicable for use in pumps, agitators, mixers, and other rotary and reciprocating equipment.