Yoshitake GD-46 Series Instruction Manual page 10

（10）Use the polystyrene foam as the thermal insulating material.
（11）The band on the insulating material also serves as instruction. Attach it to the product after
piping for future reference.
（12）To attach union joint to the reducing valve, fasten the union nut by hand till it touches the
gasket (①), and then screw it in by approximately 1/3 turn (②), as shown below.
※Do not apply a torque more than the above-specified. Overtightening causes outside
leakage.
（13）When installed in a closed piping, the reducing valve is damaged due to volume expansion of
the fluid caused by temperature increase.
（14）If fluid remains inside the reducing valve for a long time, the sliding parts become stuck
resulting in malfunction of the valve.
（15）Do not apply excessive load, torque or vibration to the reducing valve.
（16）Do not connect the reducing valve to a dissimilar metal pipe that can cause a potential
difference, to avoid corrosion of the valve or its parts.
（17）Choose a proper reducing valve considering usage conditions including use frequency and the
durability of the valve.
（18）In the case where a cross-linked polyethylene pipe with casing is used for a header, support
the pipe with metal fittings. Otherwise, outside leakage may occur due to excessive load
applied to the union packing.
（19）Be sure to install the pressure gauge only after confirming the water pressure is lowered after
the pressure test.
・ Space required for disassembly and inspection
Standard number of
Normal
screwed threads
diameter
(ridges)
20A 6
Standard screwed thread depth
(mm)
11
－9－
Standard tightening torque
(N・m)
60
■EPDT-166f■