Emerson Fisher 122A Series Instruction Manual Download | Manualshive

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Type 122A

3

Figure 2.

Type 122A Three-Way Switching Valve Operational Schematic

INLET PRESSURE
OUTLET PRESSURE

ATMOSPHERIC PRESSURE

A2606

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

INLET PRESSURE

OUTLET PRESSURE

ATMOSPHERIC PRESSURE

ADJUSTING SCREW

UPPER VALVE SEAT

LOWER VALVE SEAT

DIAPHRAGM

SPRING

STEM

PORT D

PORT A

PORT C

PORT B

VALVE

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Summary of Contents for Fisher 122A Series

Page 1: ...lation operation and maintenance procedures performed by unqualified personnel may result in improper adjustment and unsafe operation Either condition may result in equipment damage or personal injury Only qualified personnel shall install operate and maintain the Type 122A three way switching valve Introduction Scope of the Manual This Instruction Manual includes installation adjustment maintenan...

Page 2: ...ients Cg 2 Connection A to B 138 Connection A to C 131 C1 Connection A to B 28 0 Connection A to C 32 5 Control Connection 1 4 NPT Approximate Weight 5 lbs 2 3 kg 1 The pressure temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded 2 At an inlet pressure of 25 psig 1 7 bar and with full pressure drop across the body Principle of Operati...

Page 3: ...ematic INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE A2606 INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE INLET PRESSURE OUTLET PRESSURE ATMOSPHERIC PRESSURE ADJUSTING SCREW UPPER VALVE SEAT LOWER VALVE SEAT DIAPHRAGM SPRING STEM PORT D PORT A PORT C PORT B VALVE ...

Page 4: ...h proper installation completed and downstream equipment properly adjusted slowly open the upstream and downstream shutoff valve when used while using pressure gauges to monitor pressure WARNING To avoid personal injury property damage or equipment damage caused by bursting of pressure containing parts or explosion of accumulated gas never adjust the control spring to produce an outlet pressure hi...

Page 5: ...e upper seat ring key 24 Assembly 1 Screw the upper seat ring key 24 into the body key 23 2 Install the back up rings and O rings keys 13 and 12 into each end of the diaphragm case key 2 3 Install the washer key 17 and three felt washers key 18 into the valve end of the diaphragm case Replace the guide bushings key 15 in each end of the diaphragm casing Carefully insert the stem key 5 through the ...

Page 6: ...022 18 Washer Neoprene CR Felt 3 required 1K787206992 19 Union Nut Ductile iron 1E471119062 Recommended spare parts 20 Snap Ring Plated steel 1A832648722 21 Body Gasket Composition 1A832504032 22 Disk Holder Assembly Aluminum Nitrile NBR 1R1772000A2 Stainless steel Nitrile NBR 1R1772X00A2 Stainless steel Fluorocarbon FKM 1R1772X0032 23 Body Cast iron 3 4 NPT 1D3124X0022 1 NPT 1D3125X0022 WCC Steel...

Page 7: ...Type 122A 7 Figure 3 Type 122A Three Way Switching Valve Assembly 20A9801 A 7 1 3 5 29 9 12 10 13 15 2 19 C A B 24 37 36 23 22 18 21 17 13 12 14 16 4 26 8 6 4 25 28 31 30 20 ...

Page 8: ...ntenance of any Emerson Process Management Regulator Technologies Inc product remains solely with the purchaser Industrial Regulators Emerson Process Management Regulator Technologies Inc USA Headquarters McKinney Texas 75070 USA Tel 1 800 558 5853 Outside U S 1 972 548 3574 Asia Pacific Shanghai 201206 China Tel 86 21 2892 9000 Europe Bologna 40013 Italy Tel 39 051 419 0611 Middle East and Africa...

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