Teflon lined butterfly valves

Garlock PTFE-lined butterfly valves are intended for the reliable control of corrosive, toxic, abrasive, and explosive media.

Garlock valves are known in the chemical, petrochemical, process, food industry, and many other industries for their quality, performance, and reliable functioning even in under the most difficult conditions. Garlock valves are manufactured in compliance with TA-Luft and FDA requirements; they are SIL 2 certified according to the standard EN 61508.

A PTFE (polytetrafluoroethylene) lining is used in Garlock valves owing to its excellent chemical resistance. At the Garlock production facility in Neuss, Germany, the isostatic moulding process (granulates are pressed evenly from all sides) is used for ensuring the quality and durability of the r products.

Garlock GmbH Neuss (Germany) is EN ISO 9001:2008 and EN ISO 14001:2004 certified.

Garlock butterfly valve product lines:


GAR-SEAL valves are used extensively in various applications where corrosive, abrasive or toxic media need to be reliably controlled. GAR-SEAL valves are used for flow throttling or shut-off duties in the chemical, petrochemical, and paper industries, for example. GAR-SEAL butterfly valves offer reduced maintenance requirements and increased operational reliability.


MOBILE-SEAL butterfly valves are used on road tanker vehicles, railway wagons, silos and other transportation and storage containers where special safety requirements have been established for the relevant equipment. MOBILE-SEAL valves are EN 14432 approved.


SAFETY-SEAL valves are generally used in applications where electrostatic charges must be avoided. This is achieved through use of conductive linings and earthing.


STERILE-SEAL butterfly valves are used in sterile processes in the pharmaceutical and food industries, for example. The special characteristic of this valve is its external steriliszation capability. The design is such that the critical ‘dead’ areas of the valve can be steriliszed with steam without coming into contact with the process medium.


For emissions control in chemical, hazardous, or toxic applications where leakage of gasifying media into the environment must be prevented. The Garlock TOXI-SEAL butterfly valve suits such applications owing to its leakage prevention chamber and gland pressure sealing.


Garlock also offers a full range of valve accessories, such as special locking levels and gears. A comprehensive automation accessories range is also available, including valve installation kits, actuators, limit switch devices, and valve positioners.