Is the Seal set for ISO 21287 actuator, LINER series, fi 80, 100, polyurethane compatible with both single- and double-acting compact actuators?

Yes. The Seal set for ISO 21287 actuator, LINER series, fi 80, 100, polyurethane is compatible with both single-acting and double-acting compact actuators, provided the actuator conforms to ISO 21287 dimensions and the specified diameters (Ã80 or Ã100). Polyurethane seals in this set are designed for the standard geometries and sealing requirements of LINER series compact actuators and can be used in spring-return (single-acting) units as well as in double-acting units where seals must withstand bidirectional pressure and dynamic movement. Ensure you select the correct diameter (80 or 100) and verify any specific temperature, media or pressure limits of your application to confirm material suitability.

Does the Seal set for ISO 21287 actuator, LINER series, fi 80, 100, polyurethane include spare rings for maintenance?

Seal set for ISO 21287 actuator, LINER series, fi 80, 100, polyurethane does not explicitly state inclusion of spare rings for maintenance. Description "Set of interchangeable seals for compact actuator ISO 21287, LINER series. Material: polyurethane. Diameter: 80, 100." suggests the set contains the seals required for the actuator sizes listed, but it does not confirm additional spare rings beyond the interchangeables. For certainty about spare/extra rings for maintenance, please contact the supplier or check the detailed parts list.