Series 98 & 98H Scotch Yoke Actuator
Installation, Operation and Maintenance Manual
© 2020 BRAY INTERNATIONAL, INC. ALL RIGHTS RESERVED. BRAY.COM The Information contained herein shall not be copied, transferred,
conveyed, or displayed in any manner that would violate its proprietary nature without the express written permission of Bray International, Inc.
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Table of Contents
1.0 - Definition of Terms 5
1.1 Hazard-free Use 5
2.0 Introduction 5
2.1 Storage 6
3.0 Installation 6
4.0 Operation Guidelines 7
5.0 Assembly Drawing and Materials of Construction 8
5.1 Spring Return Pneumatic Actuator Assembly Drawing and Materials of Construction 8
5.2 Spring Return Hydraulic Actuator Assembly Drawing and Materials of Construction 10
6.0 Maintenance 12
6.1 Lubricants and Maintenance Consumables 12
6.2 Disassembly, Service & Reassembly of Modules 12
6.3 Spring Module 12
6.3.1 Removing the Spring Module 12
6.3.2 Service & Reassembly of the Spring Module 13
6.4 Pressure Module 14
6.4.1 Removing the Pressure Module from Actuator 14
6.4.2 Disassembling the Pneumatic Pressure Module 15
6.4.3 Service & Reassembly of the Pneumatic Pressure Module 15
6.4.4 Disassembling the Hydraulic Pressure Module 16
6.4.5 Service & Reassembly of the Hydraulic Pressure Module 16
6.5 Torque Module 18
6.5.1 Disassembling the Torque Module 18
6.5.2 Service & Reassembly of the Torque Module 18
6.6 Reassembly of Actuator 19
7.0 Field Conversions 20
7.1 Fail Safe Condition (for Spring Return Actuators) 20
7.2 Double Acting to Spring Return 20
7.3 Spring Return to Double Acting 20
8.0 Assembly and Materials of Construction - Double acting single cylinder 22
8.1 Pneumatic Actuator - Double Acting, Single Cylinder Assembly and Materials of Construction 22
8.2 Hydraulic Actuator - Double Acting, Single Cylinder Assembly and Materials of Construction 24
9.0 Assembly and Materials of Construction - Double Acting Dual Cylinder 26
9.1 Pneumatic Actuator - Double Acting, Dual Cylinder Assembly and Materials of Construction 26
9.2 Hydraulic Actuator - Double Acting, Dual Cylinder Assembly and Materials of Construction 28
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