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Low Pressure Motor Valves Slide 2 Single Acting Motor Valve Single soft seat Tight shut-off Full line size opening Removable valve seat Optional opening assist spring Available in sizes 1 through 6 Pressure Closing Slide 3 Pressure Closing Valve Slide 4 MT Single Acting Motor Valves Pressure Closing Full Sized Port High Capacity Reduced Port Closes Against Higher Pressure Slide 5 Double Acting Motor Valve Single soft seat Tight shut-off Full line size opening Removable valve seat Optional diaphragm spring rates Available in sizes 1 through 6 Pressure Opening Slide 6 Pressure Opening Valve Burner Valve Slide 7 Double Acting Motor Valves Pressure Opening Full Sized Port High Capacity Reduced Port Closes Against Higher Pressure Slide 8 Tight shut-off Full line size opening Adjustable shut-off pressure Available in cast iron, ductile iron, or steel Available in sizes 1 through 3 Adjustable Double Acting Motor Valves Slide 9 Tight shut-off Full line size opening Adjustable shut-off pressure Available in cast iron, ductile iron, or steel Available in sizes 1 through 3 Slide 10 2 Spring Loaded Back Pressure Valves Slide 11 Spring adjustment: 0 10 psi 10 20 psi 15 30 psi 25 50 psi 30 65 psi 40 85 psi Reduced Inner Valve Spring adjustment: 0 10 psi 10 25 psi 20 40 psi 40 65 psi 65 90 psi 80 125 psi