General Description: The PTA™ (Passive Thermal Actuator) developed and manufactured by MEWASA A Swiss Manufacturing Company) is a self-operating device that changes its length according to temperature fluctuations and serves as a linear actuator in various applications. The metal Passive Thermal Actuator is designed for various specified temperature ranges and allows the user to design Mechanical, Cryogenic and Electro-optical systems with precise movement as required. The PTA™ unique sturdy construction design provides a maintenance free linear movement with an extremely high reliability. The PTA™ is designed for more than 1 million operational cycles. Principle Operation: The PTA™ is a stainless steel sealed welded metal construction is based on the precision Edge Welded Bellows that are designed and Manufactured by MEWASA. The sealed actuator is filled with thermal fluid which expands and retracts according to the fluid/environment temperature changes. Thus, generating precise repeatable linear movement; pushing and pulling the required mechanism under a specified load. The Expansion Rate (defined as the fractional change in length per degree change in temperature) is customized and tested at MEWASA’s in-house laboratory per our rigid Q.A. standards prior to shipment. The PTA™ is designed to move within several microns (thousands of an inch) and will work in any temperature range between –40°c and +80ºc (-40°F to 176°F). This cost effective PTA™ is a leak tight actuator which maintains its repeatability in a wide range of temperatures and pressures. The PTA™ frictionless structure and compact design functions as the ultimate solution for systems where external power is undeliverable. The Passive Thermal Actuator designed and manufactured by MEWASA is capable to meet your parameters. Product Features: • Highly accurate linear movement in a wide range of temperatures and pressures. • Eliminates the need for external power. • Maintenance free operation – no elastomeric seals required. • Flexible design that can be installed in either horizontal or vertical orientation. • Hermetically sealed and environmentally protected. • Complete stainless steel construction to resist corrosion. • Frictionless operation. • Designed to customer specific functional needs • No calibration required – preset at factory (plug and play). • Designed to deliver extremely precise and highly repeatable linear activation. • Sizes: from Ø13mm (Ø ½") • Materials: St.St. 316, AM350, Titanium Gr. 2, Inconel, Hastelloy C-276. (Note: material selection should take into account the environment and application) • Available Lengths: From 12mm (½") according to design • End Piece Standards: Threads, flanges to fit customer design • Installation Position: Vertical or Horizontal • Thermal Expansion Coefficient: from 0.01mm/°C (0.0008"/°F) • Actuation Force: from 1kg (2.2 lb.)