Selection of stud bolts and nuts
•
Select all fasteners (nuts and studs) used in a hydrostatic test according to the flange
size and quantity listed in ASME ANSI B16.5.
•
Use the shortest stud bolt that permits full engagement of the thread through the
nut by hand-tightening.
•
Use only clean, rust-free nuts and stud bolts.
Note
Ensure that once the nut is tightened two threads outside the nut are exposed. The only exception is
when a flange requires hydraulic bolt tensioning. The manufacturer of the hydraulic bolt tensioning
equipment will specify number of exposed threads outside the nut.
•
Do not use damaged or worn stud bolts or nuts.
•
Do not use nuts or stud bolts that do not fit together correctly.
•
Do not use nuts or stud bolts without grade or type identification.
•
Do not mix nuts or stud bolts of different coatings. Different nut and stud bolt
coatings require different torques to achieve the same bolt tension.
•
Do not assemble nuts with the identification hard stamp against the back face of the
flange
Stud bolt and nut storage
Remove each nut and bolt as a pair. Thread the matching nut back onto the bolt. Stack
them in a fashion that will not cause thread damage.
Reuse of stud bolts and nuts
The reuse of threaded fasteners is permitted on Daniel control valves under the following
conditions:
•
Fasteners are clean, free of corrosion, paint, thread damage, cracks, teeth marks
(caused by wrenches) or other signs of damage.
•
Fasteners are not tightened to or beyond their yield strength.
•
Fasteners have not lost their coating.
Compare the threads of a used stud bolt with the thread of a new stud bolt. Finger-tighten
the nut over the entire thread length of the bolt.
6.2
Oil filling procedure for valve with drain port
The oil reservoir is supplied with two sight gauges. When properly filled and the valve
closed, the oil level will be half way between the two sight gauges. In the closed valve
position oil is visible only at the lower sight gauge. Oil visible in the upper sight gauge
indicates that the valve is in the open position or that the line product is present in the oil
reservoir.
1.
a) Locate NPT plug on the Cylinder Head as shown in
.
Installation procedure
74
Daniel Models 762, 763, 765, 766 and 767 Control Valves
Summary of Contents for Daniel 762
Page 8: ......
Page 12: ...Plan 2 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 47: ...Models 762 763 765 766 and 767 Control Valves NPS 16 Figure 1 6 Introduction User manual 37 ...
Page 52: ...Introduction 42 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 72: ...Prepare the control valve for use 62 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 74: ...Install 64 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 82: ...Installation prerequisites 72 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 88: ...Testing the product 78 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 89: ...Part III Operate Operate User manual 79 ...
Page 90: ...Operate 80 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 96: ...Maintain 86 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 112: ...Decommission 102 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 113: ...Decommission User manual 103 ...
Page 114: ...Decommission 104 Daniel Models 762 763 765 766 and 767 Control Valves ...
Page 115: ...Decommission User manual 105 ...