Leser 526 API - User Manual

LESER Global Standard
Assembly instructions for type 526 API
LGS 4104
Page 1/45
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
Type 526 API

Summary

Purpose of LESER Global Standard

Scope of Application

References for Assembly Instructions

Disclaimer and Liability Information

Qualified Fitting Personnel Requirements

General Information for Assembly

General Illustration of API 526

Preparation for Valve Assembly

Emboss the Punch Numbers

Instructs on marking the valve flange with specific codes as per order.

Section 9.1: Assembly of the Nozzle and Blow Down Ring

Section 9.2: Screw the Studs into the Body

Section 9.3: Installation of Locking Screw and Screw Plug

Section 9.4: Assembly of Disc Assembly

9.4.1 Metal Seat Assembly

Describes the assembly process for the metal seat component of the disc.

9.4.2 O-ring Seal Installation

Details the procedure for installing the O-ring seal onto the disc assembly.

9.4.3 Disc with Sealing Plate

Guides the assembly of the disc component with its associated sealing plate.

Section 9.5: Assembly of Spindle;Disc Assembly

9.5.1 Spindle;Disc Assembly (Without Bellows)

Specific instructions for assembling the spindle and disc without bellows.

9.5.2 Spindle;Disc Assembly (With Stainless Steel Bellows)

Specific instructions for assembling the spindle and disc with stainless steel bellows.

9.5.3 Spindle;Disc Group (No Balanced Piston)

Assembly steps for the spindle/disc group without a balanced piston.

9.5.4 Spindle;Disc Group (With Balanced Piston)

Assembly steps for the spindle/disc group with a balanced piston.

9.5.5 Insert Construction Group (Without Bellow)

Details the insertion of the spindle/disc assembly into the valve body.

9.5.6 Inserting Spindle;Disc Assembly (With Stainless Steel Bellows)

Describes inserting the spindle/disc assembly with bellows into the valve body.

Section 9.6: Assembly of the Bonnet

Section 9.7: Determination and Installation of the Lift Stopper

9.7.1 Lift Stopper with Ring;Sleeve

Details the procedure for determining and installing a lift stopper using a ring and sleeve.

9.7.2 Lift Stopper with Set Screw

Explains the installation process for a lift stopper utilizing a set screw.

Section 9.8: Assembly of the Adjusting Screw

Section 9.9: Adjusting the Set Pressure

Section 9.10: Testing the Seat Tightness P12

Section 9.11: Assembly of the Cap; Lever

9.11.1 Assembly of Cap H2

Specific instructions for the assembly of the H2 type cap.

9.11.2 Assembly of Lever H3

Specific instructions for the assembly of the H3 type lever.

9.11.3 Special Assembly of the Cap H3

Details the various configurations and assembly steps for the H3 cap.

9.11.4 Test of the Lifting Fork Position

Describes the test to verify the correct position of the lifting fork on the H4 cap.

9.11.5 Assembly of Lever H4

Specific instructions for the assembly of the H4 type lever.

9.11.6 Special Assembly of the Cap H4

Details the various configurations and assembly steps for the H4 cap.

Section 9.12: Assembly of the Lift Indicator

Section 9.13: Installation of the Test Gag (H2 and H4)

Section 9.14: Installation of O-ring Dampers

9.14.1 O-ring Damper H2 Installation

Details the installation procedure for the H2 type O-ring damper.

9.14.2 O-ring Damper H4 Installation

Details the installation procedure for the H4 type O-ring damper.

Section 9.15: Adjusting the Set Pressure (Final Check)

Section 9.16: Testing Seal Tightness of Back Seal P21

Section 9.17: Sealing the Valve

Leser 526 API Specifications

General

Standard	API 526
Connection Type	Flanged
Type	Safety Valve
Material	Stainless Steel, Carbon Steel
Size Range	1" to 8"