Emerson Fisher 644 and 645 Installation Manual download pdf

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Fisherr 644 and 645 Differential Pressure Pump

Governors

Contents

Introduction 1.................................

Scope of Manual 1.............................

Description 1.................................

Specifications 2...............................

Educational Services 3.........................

Installation 3..................................

Direct-Acting Actuators 4.......................

Reverse-Acting Actuators 5.....................

Overpressure 6.................................

Startup 6......................................

Adjustment 6.................................

Principle of Operation 7.........................

Maintenance 7.................................

Disassembly 8................................

Reassembly 8.................................

Parts Ordering 10...............................

Parts List 10...................................

Figure 1. Fisher 644 Actuator Mounted on a Typical

easy-e™ Valve

W2265-1

Introduction

Scope of Manual

This instruction manual provides information on installation, adjustment, maintenance, and parts ordering for the

Fisher 644 and 645 differential pressure pump governors. Refer to separate instruction manuals for information about

the valve and other accessories used with these governors.

Do not install, operate, or maintain 644 or 645 governors without being fully trained and qualified in valve, actuator,

and accessory installation, operation, and maintenance. To avoid p ersonal injury or property damage, it is important

to carefully read, understand, and follow all the contents of this manual, including all safety cautions and warnings. If

you have any questions about these instructions, contact your Emerson Process Management sales office before

proceeding.

Description

644 and 645 actuators are used in combination with any of several sliding-stem valves to automatically control

steam-driven boiler feedwater pumps (reciprocating or turbine). The 644 or 645 actuator (see figures 1 and 2), when

used in combination with one of several push-down-to-close sliding-stem valves, forms a pump governor.

644 and 645 actuators may also be combined with push-down-to-open valves to be used as relief governors. Relief

governors are used to divert excess pump discharge back to the suction side of the pump.

Instruction Manual

D100302X012

644 and 645 Pump Governors

February 2014

1 2 3 4 5 6 ... 11 12

Summary of Contents

Page 1 - Governors

www.Fisher.comFisherr 644 and 645 Differential Pressure PumpGovernorsContentsIntroduction 1...Scope of Manual 1...

Page 2 - Specifications

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 201410Parts OrderingEach actuator has a serial number stamped on the nameplate. Always

Page 3 - Installation

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 201411Figure 5. Equalizing Piping Configuration10A8251-AFigure 6. Fisher 644 Actuator

Page 4 - Direct-Acting Actuators

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 201412Figure 7. Fisher 645 Actuator AssemblyDF9840-APARTS NOTSHOWN: KEY 28Emerson Proc

Page 5 - Reverse-Acting Actuators

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 20142Table 1. SpecificationsActuator SizesSee table 2Actuator TravelChloroprene Diaphr

Page 6 - Overpressure

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 20143Educational ServicesFor information on available courses for Fisher 644 and 645 p

Page 7 - Maintenance

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 20144To avoid personal injury or property damage caused by bursting of pressure-retain

Page 8 - Reassembly

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 20145Figure 4. Typical Installation for a Relief GovernorSUCTIONPUMPDISCHARGE14A2789-A

Page 9 - 645 (figure 7)

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 20146OverpressureWARNINGOverpressuring any portion of this equipment may cause damage

Page 10 - Parts List

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 20147Principle Of OperationFigure 3 shows a 645-ED being used to directly maintain a d

Page 11 - Instruction Manual

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 20148DisassemblyRefer to figures 6 and 7.1. Remove the control line from the upper cas

Page 12

Instruction ManualD100302X012644 and 645 Pump GovernorsFebruary 201493. Lubricate the packing flange studs (key 8) and the faces of the packing flange

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Emerson Fisher 644 and 645 Installation Manual

Browse online or download Installation Manual for Motor vehicle accessories & components Emerson Fisher 644 and 645. Emerson Fisher 644 and 645 Installation Instructions User Manual

Summary of Contents

Comments to this Manuals

Related products and manuals for Motor vehicle accessories & components Emerson Fisher 644 and 645