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Water Pressure Safety Valves
Series
740

No. Model Size Height Length Weight (Lbs.)
740 M1 3/4"" x 1"" 5 5/8 3 1 7/8
740 M 1"" x 1 1/4"" 7 1/4 3 1/2 3 1/8
740 M 1 1/4"" x 1 1/2"" 8 3/4 4 5/8 6 1/8
740 M 1 1/2"" x 2"" 9 1/4 5 1/4 7 1/2
740 M 2"" x 2 1/2"" 11 5/8 6 3/4 16 1/2

Settings and Relieving Capacities
(National Board Certified Ratings) BTU Steam Discharge Capacities
No. Size 30 lbs. 45 lbs. 50 lbs. 75 lbs.
740 3/4"" x 1"" 925,000 1,245,000 1,352,000 1,886,000
740 1"" x 11/4"" 1,300,000 1,750,000 1,899,000 2,649,000
740 1 1/4"" x 1 1/2"" 2,105,000 2,830,000 3,075,000 4,285,000
740 1 1/2"" x 2"" 2,900,000 3,903,000 4,237,000 5,909,000
740 2"" x 2 ½ 5,250,000 7,067,000 7,672,000 10,700,000
Valve settings, other than shown above, are available in 5 lb. increments within the pressure ranges shown.

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