How do I verify rotation if the original markings are gone

This unit provides critical high-limit protection while functioning as the primary switching relay for both burner and circulator motors

The tape can act as an insulator and interfere with the continuity required for the LWCO circuit to function safely

this general service valve is engineered to handle air

Versatile Compatibility: Designed for both slab-sensing and aerial retrofit installations

Parker Refrigeration Specialties CK4A-8 Check Valve R-448A How do I verify rotationThe Parker Refrigeration Specialties CK4A 8 Check Valve is a rugged, 2 inch ODS inline check valve engineered for heavy duty industrial refrigeration applications. Built with a ductile iron body (GGG 40. 3), this spring closing check valve provides a positive shut off to prevent refrigerant backflow in liquid lines, suction lines, and hot gas discharge lines. As a veteran preferred component for screw compressor systems, the CK4A 8 is particularly