Leser 526 API - Purpose of LESER Global Standard; Scope of Application

LESER Global Standard
Assembly instructions for type 526 API
LGS 4104
Page 2/45
disclosure cat.:
II
proofread:
SSt
published date:
06/14/18
effect. date:
05/18
author:
Nieh
released by:
KUW
replaces:
initial
status:
Published
resp. depart.:
IE
date of release:
06/14/18
revision No.:
2
doc. type:
LGS
change rep. No.:
NA
retention period:
10
protected
Contents
1 Purpose ............................................................................................................... 2
2 Scope .................................................................................................................. 2
3 References .......................................................................................................... 3
4 Disclaimer ............................................................................................................ 3
5 Qualified fitting personnel .................................................................................... 3
6 General Information ............................................................................................. 3
7 General illustration .............................................................................................. 4
8 Preparation for valve assembly ........................................................................... 5
8.1 Emboss the punch numbers (if requested in the order). ............................... 5
9 Assembly of type 526 .......................................................................................... 5
9.1 Assembly of the nozzle and blow down ring ................................................. 5
9.2 Screw the studs into the body. ..................................................................... 7
9.3 Installation of the locking screw and screw plug ........................................... 7
9.4 Assembly of disc assembly .......................................................................... 9
9.5 Assembly of spindle/disc assembly ............................................................ 13
9.6 Assembly of the bonnet .............................................................................. 24
9.7 Determination and installation of the lift stopper ......................................... 25
9.8 Assembly of the adjusting screw ................................................................ 28
9.9 Adjusting the set pressure .......................................................................... 30
9.10 Testing the seat tightness P12 ................................................................... 31
9.11 Assembly of the cap / lever ........................................................................ 31
9.12 Assembly of the lift indicator ....................................................................... 38
9.13 Installation of the test gag (possible for H2 and H4) ................................... 40
9.14 Installation of the different O-ring dampers ................................................ 41
9.15 Adjusting the set pressure .......................................................................... 45
9.16 Testing the seal tightness of the back seal P21 ......................................... 45
9.17 Sealing the valve ........................................................................................ 45
1 Purpose
This LESER Global Standard (LGS) describes the assembly procedure for a LESER
safety valve type 526 API.
2 Scope
This document must be applied to the assembly of an API safety valve in agencies
and subsidiaries of LESER GmbH & Co. KG.