The Parker Sporlan Type DDR differential pressure regulating valves have a cast iron painted body with copper connections and the (O)LDR) differential pressure regulating valves have a brass body with copper connections. These valves are adjustable.  The DDR creates a differential pressure between its inlet (discharge) pressure and the receiver pressure to allow reverse flow during the defrost cycle.  The (O)LDR creates a differential pressure between the receiver and liquid header to allow reverse flow during the defrost cycle. Each valve is factory tested to ensure positive leak-free performance.

Markets:
• Refrigeration

Features/Benefits:
• Able to maintain a differential pressure between the defrost header and the liquid header, allowing reverse flow during the defrost cycle.
• Combines a liquid differential valve and a solenoid valve into one component, thus reducing piping costs.
• Ability to adjust the differential setting.
• Design working pressure for the DDR and (O)LDR valves is 400 psi (27.6 bar),

Applications:
• Refrigeration – Supermarket racks

For over 80 years the Sporlan Division of Parker Hannifin has set the industry standard for the development and manufacture of leading edge HVACR components. Our outside technical sales force and application engineering team focuses on refrigeration system applications and troubleshooting for service technicians, distribution channel partners, and original equipment manufacturers.