Oil Filling Procedure For Valve With Drain Port - DANIEL 762 User Manual

Table of Contents

Installation procedure

Selection of stud bolts and nuts

•

Select all fasteners (nuts and studs) used in a hydrostatic test according to the flange

size and class listed in ASME 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