Design and Technical Manual

6. SYSTEM DESIGN
Handling precautions for the valves
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Mounted part of Blank cap is sealed for protection. ●
Fasten blank cap tightly after opening valves. ●
Blank cap
[in. (mm)]
Tightening torque
[lbf· ft (N·m)]
1/4 (6.35) 14.8 to 18.4 (20 to 25)
3/8 (9.52) 14.8 to 18.4 (20 to 25)
1/2 (12.70) 18.4 to 22.1 (25 to 30)
5/8 (15.88) 22.1 to 25.8 (30 to 35)
3/4 (19.05) 25.8 to 29.5 (35 to 40)
Operating the valves
Use a hexagon wrench [size 3/16 in. (4 mm)]. ●
Opening (1) Insert the hexagon wrench into the valve shaft, and turn it counterclockwise. ●
(2) Stop turning when the valve shaft can no longer be turned. (Open position)
Closing (1) Insert the hexagon wrench into the valve shaft, and turn it clockwise. ●
(2) Stop turning when the valve shaft can no longer be turned. (Closed position)
Opening direction
Opening direction
Hexagon wrench
Liquid pipe
Gas pipe
Seal (blank cap installation portion)
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SYSTEM DESIGN SYSTEM DESIGN